MagickCore 7.1.2-26
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vision.c
1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% V V IIIII SSSSS IIIII OOO N N %
7% V V I SS I O O NN N %
8% V V I SSS I O O N N N %
9% V V I SS I O O N NN %
10% V IIIII SSSSS IIIII OOO N N %
11% %
12% %
13% MagickCore Computer Vision Methods %
14% %
15% Software Design %
16% Cristy %
17% September 2014 %
18% %
19% %
20% Copyright @ 1999 ImageMagick Studio LLC, a non-profit organization %
21% dedicated to making software imaging solutions freely available. %
22% %
23% You may not use this file except in compliance with the License. You may %
24% obtain a copy of the License at %
25% %
26% https://imagemagick.org/license/ %
27% %
28% Unless required by applicable law or agreed to in writing, software %
29% distributed under the License is distributed on an "AS IS" BASIS, %
30% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31% See the License for the specific language governing permissions and %
32% limitations under the License. %
33% %
34%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35%
36%
37*/
38␌
39#include "MagickCore/studio.h"
40#include "MagickCore/artifact.h"
41#include "MagickCore/blob.h"
42#include "MagickCore/cache-view.h"
43#include "MagickCore/color.h"
44#include "MagickCore/color-private.h"
45#include "MagickCore/colormap.h"
46#include "MagickCore/colorspace.h"
47#include "MagickCore/constitute.h"
48#include "MagickCore/decorate.h"
49#include "MagickCore/distort.h"
50#include "MagickCore/draw.h"
51#include "MagickCore/enhance.h"
52#include "MagickCore/exception.h"
53#include "MagickCore/exception-private.h"
54#include "MagickCore/effect.h"
55#include "MagickCore/gem.h"
56#include "MagickCore/geometry.h"
57#include "MagickCore/image-private.h"
58#include "MagickCore/list.h"
59#include "MagickCore/log.h"
60#include "MagickCore/matrix.h"
61#include "MagickCore/memory_.h"
62#include "MagickCore/memory-private.h"
63#include "MagickCore/monitor.h"
64#include "MagickCore/monitor-private.h"
65#include "MagickCore/montage.h"
66#include "MagickCore/morphology.h"
67#include "MagickCore/morphology-private.h"
68#include "MagickCore/opencl-private.h"
69#include "MagickCore/paint.h"
70#include "MagickCore/pixel-accessor.h"
71#include "MagickCore/property.h"
72#include "MagickCore/quantum.h"
73#include "MagickCore/resource_.h"
74#include "MagickCore/signature-private.h"
75#include "MagickCore/string_.h"
76#include "MagickCore/string-private.h"
77#include "MagickCore/thread-private.h"
78#include "MagickCore/token.h"
79#include "MagickCore/vision.h"
80␌
81/*
82%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
83% %
84% %
85% %
86% C o n n e c t e d C o m p o n e n t s I m a g e %
87% %
88% %
89% %
90%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
91%
92% ConnectedComponentsImage() returns the connected-components of the image
93% uniquely labeled. The returned connected components image colors member
94% defines the number of unique objects. Choose from 4 or 8-way connectivity.
95%
96% You are responsible for freeing the connected components objects resources
97% with this statement;
98%
99% objects = (CCObjectInfo *) RelinquishMagickMemory(objects);
100%
101% The format of the ConnectedComponentsImage method is:
102%
103% Image *ConnectedComponentsImage(const Image *image,
104% const size_t connectivity,CCObjectInfo **objects,
105% ExceptionInfo *exception)
106%
107% A description of each parameter follows:
108%
109% o image: the image.
110%
111% o connectivity: how many neighbors to visit, choose from 4 or 8.
112%
113% o objects: return the attributes of each unique object.
114%
115% o exception: return any errors or warnings in this structure.
116%
117*/
118
119static int CCObjectInfoCompare(const void *x,const void *y)
120{
121 CCObjectInfo
122 *p,
123 *q;
124
125 p=(CCObjectInfo *) x;
126 q=(CCObjectInfo *) y;
127 if (p->key == -5)
128 return((int) (q->bounding_box.y-(ssize_t) p->bounding_box.y));
129 if (p->key == -4)
130 return((int) (q->bounding_box.x-(ssize_t) p->bounding_box.x));
131 if (p->key == -3)
132 return((int) (q->bounding_box.height-p->bounding_box.height));
133 if (p->key == -2)
134 return((int) (q->bounding_box.width-p->bounding_box.width));
135 if (p->key == -1)
136 return((int) (q->area-(ssize_t) p->area));
137 if (p->key == 1)
138 return((int) (p->area-(ssize_t) q->area));
139 if (p->key == 2)
140 return((int) (p->bounding_box.width-q->bounding_box.width));
141 if (p->key == 3)
142 return((int) (p->bounding_box.height-q->bounding_box.height));
143 if (p->key == 4)
144 return((int) (p->bounding_box.x-(ssize_t) q->bounding_box.x));
145 if (p->key == 5)
146 return((int) (p->bounding_box.y-(ssize_t) q->bounding_box.y));
147 return((int) (q->area-(ssize_t) p->area));
148}
149
150static void PerimeterThreshold(const Image *component_image,
151 CCObjectInfo *object,const ssize_t metric_index,ExceptionInfo *exception)
152{
153 MagickBooleanType
154 status;
155
156 ssize_t
157 i;
158
159 status=MagickTrue;
160#if defined(MAGICKCORE_OPENMP_SUPPORT)
161 #pragma omp parallel for schedule(dynamic) shared(status) \
162 magick_number_threads(component_image,component_image,component_image->colors,1)
163#endif
164 for (i=0; i < (ssize_t) component_image->colors; i++)
165 {
166 CacheView
167 *component_view;
168
169 RectangleInfo
170 bounding_box;
171
172 size_t
173 pattern[4] = { 1, 0, 0, 0 };
174
175 ssize_t
176 y;
177
178 /*
179 Compute perimeter of each object.
180 */
181 if (status == MagickFalse)
182 continue;
183 component_view=AcquireAuthenticCacheView(component_image,exception);
184 bounding_box=object[i].bounding_box;
185 for (y=(-1); y < (ssize_t) bounding_box.height; y++)
186 {
187 const Quantum
188 *magick_restrict p;
189
190 ssize_t
191 x;
192
193 p=GetCacheViewVirtualPixels(component_view,bounding_box.x-1,
194 bounding_box.y+y,bounding_box.width+2,2,exception);
195 if (p == (const Quantum *) NULL)
196 {
197 status=MagickFalse;
198 break;
199 }
200 for (x=(-1); x < (ssize_t) bounding_box.width; x++)
201 {
202 Quantum
203 pixels[4];
204
205 size_t
206 foreground;
207
208 ssize_t
209 v;
210
211 /*
212 An Algorithm for Calculating Objects’ Shape Features in Binary
213 Images, Lifeng He, Yuyan Chao.
214 */
215 foreground=0;
216 for (v=0; v < 2; v++)
217 {
218 ssize_t
219 u;
220
221 for (u=0; u < 2; u++)
222 {
223 ssize_t
224 offset;
225
226 offset=v*((ssize_t) bounding_box.width+2)*
227 (ssize_t) GetPixelChannels(component_image)+u*
228 (ssize_t) GetPixelChannels(component_image);
229 pixels[2*v+u]=GetPixelIndex(component_image,p+offset);
230 if ((ssize_t) pixels[2*v+u] == i)
231 foreground++;
232 }
233 }
234 if (foreground == 1)
235 pattern[1]++;
236 else
237 if (foreground == 2)
238 {
239 if ((((ssize_t) pixels[0] == i) && ((ssize_t) pixels[3] == i)) ||
240 (((ssize_t) pixels[1] == i) && ((ssize_t) pixels[2] == i)))
241 pattern[0]++; /* diagonal */
242 else
243 pattern[2]++;
244 }
245 else
246 if (foreground == 3)
247 pattern[3]++;
248 p+=(ptrdiff_t) GetPixelChannels(component_image);
249 }
250 }
251 component_view=DestroyCacheView(component_view);
252 object[i].metric[metric_index]=ceil(MagickSQ1_2*pattern[1]+1.0*pattern[2]+
253 MagickSQ1_2*pattern[3]+MagickSQ2*pattern[0]-0.5);
254 }
255}
256
257static void CircularityThreshold(const Image *component_image,
258 CCObjectInfo *object,const ssize_t metric_index,ExceptionInfo *exception)
259{
260 MagickBooleanType
261 status;
262
263 ssize_t
264 i;
265
266 status=MagickTrue;
267#if defined(MAGICKCORE_OPENMP_SUPPORT)
268 #pragma omp parallel for schedule(dynamic) shared(status) \
269 magick_number_threads(component_image,component_image,component_image->colors,1)
270#endif
271 for (i=0; i < (ssize_t) component_image->colors; i++)
272 {
273 CacheView
274 *component_view;
275
276 RectangleInfo
277 bounding_box;
278
279 size_t
280 pattern[4] = { 1, 0, 0, 0 };
281
282 ssize_t
283 y;
284
285 /*
286 Compute perimeter of each object.
287 */
288 if (status == MagickFalse)
289 continue;
290 component_view=AcquireAuthenticCacheView(component_image,exception);
291 bounding_box=object[i].bounding_box;
292 for (y=(-1); y < (ssize_t) bounding_box.height; y++)
293 {
294 const Quantum
295 *magick_restrict p;
296
297 ssize_t
298 x;
299
300 p=GetCacheViewVirtualPixels(component_view,bounding_box.x-1,
301 bounding_box.y+y,bounding_box.width+2,2,exception);
302 if (p == (const Quantum *) NULL)
303 {
304 status=MagickFalse;
305 break;
306 }
307 for (x=(-1); x < (ssize_t) bounding_box.width; x++)
308 {
309 Quantum
310 pixels[4];
311
312 ssize_t
313 v;
314
315 size_t
316 foreground;
317
318 /*
319 An Algorithm for Calculating Objects’ Shape Features in Binary
320 Images, Lifeng He, Yuyan Chao.
321 */
322 foreground=0;
323 for (v=0; v < 2; v++)
324 {
325 ssize_t
326 u;
327
328 for (u=0; u < 2; u++)
329 {
330 ssize_t
331 offset;
332
333 offset=v*((ssize_t) bounding_box.width+2)*
334 (ssize_t) GetPixelChannels(component_image)+u*
335 (ssize_t) GetPixelChannels(component_image);
336 pixels[2*v+u]=GetPixelIndex(component_image,p+offset);
337 if ((ssize_t) pixels[2*v+u] == i)
338 foreground++;
339 }
340 }
341 if (foreground == 1)
342 pattern[1]++;
343 else
344 if (foreground == 2)
345 {
346 if ((((ssize_t) pixels[0] == i) && ((ssize_t) pixels[3] == i)) ||
347 (((ssize_t) pixels[1] == i) && ((ssize_t) pixels[2] == i)))
348 pattern[0]++; /* diagonal */
349 else
350 pattern[2]++;
351 }
352 else
353 if (foreground == 3)
354 pattern[3]++;
355 p+=(ptrdiff_t) GetPixelChannels(component_image);
356 }
357 }
358 component_view=DestroyCacheView(component_view);
359 object[i].metric[metric_index]=ceil(MagickSQ1_2*pattern[1]+1.0*pattern[2]+
360 MagickSQ1_2*pattern[3]+MagickSQ2*pattern[0]-0.5);
361 object[i].metric[metric_index]=4.0*MagickPI*object[i].area/
362 (object[i].metric[metric_index]*object[i].metric[metric_index]);
363 }
364}
365
366static void MajorAxisThreshold(const Image *component_image,
367 CCObjectInfo *object,const ssize_t metric_index,ExceptionInfo *exception)
368{
369 MagickBooleanType
370 status;
371
372 ssize_t
373 i;
374
375 status=MagickTrue;
376#if defined(MAGICKCORE_OPENMP_SUPPORT)
377 #pragma omp parallel for schedule(dynamic) shared(status) \
378 magick_number_threads(component_image,component_image,component_image->colors,1)
379#endif
380 for (i=0; i < (ssize_t) component_image->colors; i++)
381 {
382 CacheView
383 *component_view;
384
385 double
386 M00 = 0.0,
387 M01 = 0.0,
388 M02 = 0.0,
389 M10 = 0.0,
390 M11 = 0.0,
391 M20 = 0.0;
392
393 PointInfo
394 centroid = { 0.0, 0.0 };
395
396 RectangleInfo
397 bounding_box;
398
399 const Quantum
400 *magick_restrict p;
401
402 ssize_t
403 x;
404
405 ssize_t
406 y;
407
408 /*
409 Compute ellipse major axis of each object.
410 */
411 if (status == MagickFalse)
412 continue;
413 component_view=AcquireAuthenticCacheView(component_image,exception);
414 bounding_box=object[i].bounding_box;
415 for (y=0; y < (ssize_t) bounding_box.height; y++)
416 {
417 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
418 bounding_box.y+y,bounding_box.width,1,exception);
419 if (p == (const Quantum *) NULL)
420 {
421 status=MagickFalse;
422 break;
423 }
424 for (x=0; x < (ssize_t) bounding_box.width; x++)
425 {
426 if ((ssize_t) GetPixelIndex(component_image,p) == i)
427 {
428 M00++;
429 M10+=x;
430 M01+=y;
431 }
432 p+=(ptrdiff_t) GetPixelChannels(component_image);
433 }
434 }
435 centroid.x=M10*MagickSafeReciprocal(M00);
436 centroid.y=M01*MagickSafeReciprocal(M00);
437 for (y=0; y < (ssize_t) bounding_box.height; y++)
438 {
439 if (status == MagickFalse)
440 continue;
441 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
442 bounding_box.y+y,bounding_box.width,1,exception);
443 if (p == (const Quantum *) NULL)
444 {
445 status=MagickFalse;
446 break;
447 }
448 for (x=0; x < (ssize_t) bounding_box.width; x++)
449 {
450 if ((ssize_t) GetPixelIndex(component_image,p) == i)
451 {
452 M11+=(x-centroid.x)*(y-centroid.y);
453 M20+=(x-centroid.x)*(x-centroid.x);
454 M02+=(y-centroid.y)*(y-centroid.y);
455 }
456 p+=(ptrdiff_t) GetPixelChannels(component_image);
457 }
458 }
459 component_view=DestroyCacheView(component_view);
460 object[i].metric[metric_index]=sqrt((2.0*MagickSafeReciprocal(M00))*
461 ((M20+M02)+sqrt(4.0*M11*M11+(M20-M02)*(M20-M02))));
462 }
463}
464
465static void MinorAxisThreshold(const Image *component_image,
466 CCObjectInfo *object,const ssize_t metric_index,ExceptionInfo *exception)
467{
468 MagickBooleanType
469 status;
470
471 ssize_t
472 i;
473
474 status=MagickTrue;
475#if defined(MAGICKCORE_OPENMP_SUPPORT)
476 #pragma omp parallel for schedule(dynamic) shared(status) \
477 magick_number_threads(component_image,component_image,component_image->colors,1)
478#endif
479 for (i=0; i < (ssize_t) component_image->colors; i++)
480 {
481 CacheView
482 *component_view;
483
484 double
485 M00 = 0.0,
486 M01 = 0.0,
487 M02 = 0.0,
488 M10 = 0.0,
489 M11 = 0.0,
490 M20 = 0.0;
491
492 PointInfo
493 centroid = { 0.0, 0.0 };
494
495 RectangleInfo
496 bounding_box;
497
498 const Quantum
499 *magick_restrict p;
500
501 ssize_t
502 x;
503
504 ssize_t
505 y;
506
507 /*
508 Compute ellipse major axis of each object.
509 */
510 if (status == MagickFalse)
511 continue;
512 component_view=AcquireAuthenticCacheView(component_image,exception);
513 bounding_box=object[i].bounding_box;
514 for (y=0; y < (ssize_t) bounding_box.height; y++)
515 {
516 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
517 bounding_box.y+y,bounding_box.width,1,exception);
518 if (p == (const Quantum *) NULL)
519 {
520 status=MagickFalse;
521 break;
522 }
523 for (x=0; x < (ssize_t) bounding_box.width; x++)
524 {
525 if ((ssize_t) GetPixelIndex(component_image,p) == i)
526 {
527 M00++;
528 M10+=x;
529 M01+=y;
530 }
531 p+=(ptrdiff_t) GetPixelChannels(component_image);
532 }
533 }
534 centroid.x=M10*MagickSafeReciprocal(M00);
535 centroid.y=M01*MagickSafeReciprocal(M00);
536 for (y=0; y < (ssize_t) bounding_box.height; y++)
537 {
538 if (status == MagickFalse)
539 continue;
540 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
541 bounding_box.y+y,bounding_box.width,1,exception);
542 if (p == (const Quantum *) NULL)
543 {
544 status=MagickFalse;
545 break;
546 }
547 for (x=0; x < (ssize_t) bounding_box.width; x++)
548 {
549 if ((ssize_t) GetPixelIndex(component_image,p) == i)
550 {
551 M11+=(x-centroid.x)*(y-centroid.y);
552 M20+=(x-centroid.x)*(x-centroid.x);
553 M02+=(y-centroid.y)*(y-centroid.y);
554 }
555 p+=(ptrdiff_t) GetPixelChannels(component_image);
556 }
557 }
558 component_view=DestroyCacheView(component_view);
559 object[i].metric[metric_index]=sqrt((2.0*MagickSafeReciprocal(M00))*
560 ((M20+M02)-sqrt(4.0*M11*M11+(M20-M02)*(M20-M02))));
561 }
562}
563
564static void EccentricityThreshold(const Image *component_image,
565 CCObjectInfo *object,const ssize_t metric_index,ExceptionInfo *exception)
566{
567 MagickBooleanType
568 status;
569
570 ssize_t
571 i;
572
573 status=MagickTrue;
574#if defined(MAGICKCORE_OPENMP_SUPPORT)
575 #pragma omp parallel for schedule(dynamic) shared(status) \
576 magick_number_threads(component_image,component_image,component_image->colors,1)
577#endif
578 for (i=0; i < (ssize_t) component_image->colors; i++)
579 {
580 CacheView
581 *component_view;
582
583 double
584 M00 = 0.0,
585 M01 = 0.0,
586 M02 = 0.0,
587 M10 = 0.0,
588 M11 = 0.0,
589 M20 = 0.0;
590
591 PointInfo
592 centroid = { 0.0, 0.0 },
593 ellipse_axis = { 0.0, 0.0 };
594
595 RectangleInfo
596 bounding_box;
597
598 const Quantum
599 *magick_restrict p;
600
601 ssize_t
602 x;
603
604 ssize_t
605 y;
606
607 /*
608 Compute eccentricity of each object.
609 */
610 if (status == MagickFalse)
611 continue;
612 component_view=AcquireAuthenticCacheView(component_image,exception);
613 bounding_box=object[i].bounding_box;
614 for (y=0; y < (ssize_t) bounding_box.height; y++)
615 {
616 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
617 bounding_box.y+y,bounding_box.width,1,exception);
618 if (p == (const Quantum *) NULL)
619 {
620 status=MagickFalse;
621 break;
622 }
623 for (x=0; x < (ssize_t) bounding_box.width; x++)
624 {
625 if ((ssize_t) GetPixelIndex(component_image,p) == i)
626 {
627 M00++;
628 M10+=x;
629 M01+=y;
630 }
631 p+=(ptrdiff_t) GetPixelChannels(component_image);
632 }
633 }
634 centroid.x=M10*MagickSafeReciprocal(M00);
635 centroid.y=M01*MagickSafeReciprocal(M00);
636 for (y=0; y < (ssize_t) bounding_box.height; y++)
637 {
638 if (status == MagickFalse)
639 continue;
640 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
641 bounding_box.y+y,bounding_box.width,1,exception);
642 if (p == (const Quantum *) NULL)
643 {
644 status=MagickFalse;
645 break;
646 }
647 for (x=0; x < (ssize_t) bounding_box.width; x++)
648 {
649 if ((ssize_t) GetPixelIndex(component_image,p) == i)
650 {
651 M11+=(x-centroid.x)*(y-centroid.y);
652 M20+=(x-centroid.x)*(x-centroid.x);
653 M02+=(y-centroid.y)*(y-centroid.y);
654 }
655 p+=(ptrdiff_t) GetPixelChannels(component_image);
656 }
657 }
658 component_view=DestroyCacheView(component_view);
659 ellipse_axis.x=sqrt((2.0*MagickSafeReciprocal(M00))*((M20+M02)+
660 sqrt(4.0*M11*M11+(M20-M02)*(M20-M02))));
661 ellipse_axis.y=sqrt((2.0*MagickSafeReciprocal(M00))*((M20+M02)-
662 sqrt(4.0*M11*M11+(M20-M02)*(M20-M02))));
663 object[i].metric[metric_index]=sqrt(1.0-(ellipse_axis.y*ellipse_axis.y*
664 MagickSafeReciprocal(ellipse_axis.x*ellipse_axis.x)));
665 }
666}
667
668static void AngleThreshold(const Image *component_image,
669 CCObjectInfo *object,const ssize_t metric_index,ExceptionInfo *exception)
670{
671 MagickBooleanType
672 status;
673
674 ssize_t
675 i;
676
677 status=MagickTrue;
678#if defined(MAGICKCORE_OPENMP_SUPPORT)
679 #pragma omp parallel for schedule(dynamic) shared(status) \
680 magick_number_threads(component_image,component_image,component_image->colors,1)
681#endif
682 for (i=0; i < (ssize_t) component_image->colors; i++)
683 {
684 CacheView
685 *component_view;
686
687 double
688 M00 = 0.0,
689 M01 = 0.0,
690 M02 = 0.0,
691 M10 = 0.0,
692 M11 = 0.0,
693 M20 = 0.0;
694
695 PointInfo
696 centroid = { 0.0, 0.0 };
697
698 RectangleInfo
699 bounding_box;
700
701 const Quantum
702 *magick_restrict p;
703
704 ssize_t
705 x;
706
707 ssize_t
708 y;
709
710 /*
711 Compute ellipse angle of each object.
712 */
713 if (status == MagickFalse)
714 continue;
715 component_view=AcquireAuthenticCacheView(component_image,exception);
716 bounding_box=object[i].bounding_box;
717 for (y=0; y < (ssize_t) bounding_box.height; y++)
718 {
719 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
720 bounding_box.y+y,bounding_box.width,1,exception);
721 if (p == (const Quantum *) NULL)
722 {
723 status=MagickFalse;
724 break;
725 }
726 for (x=0; x < (ssize_t) bounding_box.width; x++)
727 {
728 if ((ssize_t) GetPixelIndex(component_image,p) == i)
729 {
730 M00++;
731 M10+=x;
732 M01+=y;
733 }
734 p+=(ptrdiff_t) GetPixelChannels(component_image);
735 }
736 }
737 centroid.x=M10*MagickSafeReciprocal(M00);
738 centroid.y=M01*MagickSafeReciprocal(M00);
739 for (y=0; y < (ssize_t) bounding_box.height; y++)
740 {
741 if (status == MagickFalse)
742 continue;
743 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
744 bounding_box.y+y,bounding_box.width,1,exception);
745 if (p == (const Quantum *) NULL)
746 {
747 status=MagickFalse;
748 break;
749 }
750 for (x=0; x < (ssize_t) bounding_box.width; x++)
751 {
752 if ((ssize_t) GetPixelIndex(component_image,p) == i)
753 {
754 M11+=(x-centroid.x)*(y-centroid.y);
755 M20+=(x-centroid.x)*(x-centroid.x);
756 M02+=(y-centroid.y)*(y-centroid.y);
757 }
758 p+=(ptrdiff_t) GetPixelChannels(component_image);
759 }
760 }
761 component_view=DestroyCacheView(component_view);
762 object[i].metric[metric_index]=RadiansToDegrees(1.0/2.0*atan(2.0*M11*
763 MagickSafeReciprocal(M20-M02)));
764 if (fabs(M11) < 0.0)
765 {
766 if ((fabs(M20-M02) >= 0.0) && ((M20-M02) < 0.0))
767 object[i].metric[metric_index]+=90.0;
768 }
769 else
770 if (M11 < 0.0)
771 {
772 if (fabs(M20-M02) >= 0.0)
773 {
774 if ((M20-M02) < 0.0)
775 object[i].metric[metric_index]+=90.0;
776 else
777 object[i].metric[metric_index]+=180.0;
778 }
779 }
780 else
781 if ((fabs(M20-M02) >= 0.0) && ((M20-M02) < 0.0))
782 object[i].metric[metric_index]+=90.0;
783 }
784}
785
786MagickExport Image *ConnectedComponentsImage(const Image *image,
787 const size_t connectivity,CCObjectInfo **objects,ExceptionInfo *exception)
788{
789#define ConnectedComponentsImageTag "ConnectedComponents/Image"
790
791 CacheView
792 *component_view,
793 *image_view,
794 *object_view;
795
796 CCObjectInfo
797 *object;
798
799 char
800 *c,
801 *d;
802
803 const char
804 *artifact,
805 *metrics[CCMaxMetrics];
806
807 double
808 max_threshold,
809 min_threshold;
810
811 Image
812 *component_image;
813
814 MagickBooleanType
815 status;
816
817 MagickOffsetType
818 progress;
819
820 MatrixInfo
821 *equivalences;
822
823 size_t
824 size;
825
826 ssize_t
827 background_id,
828 connect4[2][2] = { { -1, 0 }, { 0, -1 } },
829 connect8[4][2] = { { -1, -1 }, { -1, 0 }, { -1, 1 }, { 0, -1 } },
830 dx,
831 dy,
832 first,
833 i,
834 last,
835 n,
836 step,
837 y;
838
839 /*
840 Initialize connected components image attributes.
841 */
842 assert(image != (Image *) NULL);
843 assert(image->signature == MagickCoreSignature);
844 assert(exception != (ExceptionInfo *) NULL);
845 assert(exception->signature == MagickCoreSignature);
846 if (IsEventLogging() != MagickFalse)
847 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
848 if (objects != (CCObjectInfo **) NULL)
849 *objects=(CCObjectInfo *) NULL;
850 component_image=CloneImage(image,0,0,MagickTrue,exception);
851 if (component_image == (Image *) NULL)
852 return((Image *) NULL);
853 component_image->depth=MAGICKCORE_QUANTUM_DEPTH;
854 if (AcquireImageColormap(component_image,MaxColormapSize,exception) == MagickFalse)
855 {
856 component_image=DestroyImage(component_image);
857 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
858 }
859 /*
860 Initialize connected components equivalences.
861 */
862 size=image->columns*image->rows;
863 if (image->columns != (size/image->rows))
864 {
865 component_image=DestroyImage(component_image);
866 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
867 }
868 equivalences=AcquireMatrixInfo(size,1,sizeof(ssize_t),exception);
869 if (equivalences == (MatrixInfo *) NULL)
870 {
871 component_image=DestroyImage(component_image);
872 return((Image *) NULL);
873 }
874 for (n=0; n < (ssize_t) (image->columns*image->rows); n++)
875 (void) SetMatrixElement(equivalences,n,0,&n);
876 object=(CCObjectInfo *) AcquireQuantumMemory(MaxColormapSize,sizeof(*object));
877 if (object == (CCObjectInfo *) NULL)
878 {
879 equivalences=DestroyMatrixInfo(equivalences);
880 component_image=DestroyImage(component_image);
881 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
882 }
883 (void) memset(object,0,MaxColormapSize*sizeof(*object));
884 for (i=0; i < (ssize_t) MaxColormapSize; i++)
885 {
886 object[i].id=i;
887 object[i].bounding_box.x=(ssize_t) image->columns;
888 object[i].bounding_box.y=(ssize_t) image->rows;
889 GetPixelInfo(image,&object[i].color);
890 }
891 /*
892 Find connected components.
893 */
894 status=MagickTrue;
895 progress=0;
896 image_view=AcquireVirtualCacheView(image,exception);
897 for (n=0; n < (ssize_t) (connectivity > 4 ? 4 : 2); n++)
898 {
899 if (status == MagickFalse)
900 continue;
901 dx=connectivity > 4 ? connect8[n][1] : connect4[n][1];
902 dy=connectivity > 4 ? connect8[n][0] : connect4[n][0];
903 for (y=0; y < (ssize_t) image->rows; y++)
904 {
905 const Quantum
906 *magick_restrict p;
907
908 ssize_t
909 x;
910
911 if (status == MagickFalse)
912 continue;
913 p=GetCacheViewVirtualPixels(image_view,0,y-1,image->columns,3,exception);
914 if (p == (const Quantum *) NULL)
915 {
916 status=MagickFalse;
917 continue;
918 }
919 p+=(ptrdiff_t) GetPixelChannels(image)*image->columns;
920 for (x=0; x < (ssize_t) image->columns; x++)
921 {
922 PixelInfo
923 pixel,
924 target;
925
926 ssize_t
927 neighbor_offset,
928 obj,
929 offset,
930 ox,
931 oy,
932 root;
933
934 /*
935 Is neighbor an authentic pixel and a different color than the pixel?
936 */
937 GetPixelInfoPixel(image,p,&pixel);
938 if (((x+dx) < 0) || ((x+dx) >= (ssize_t) image->columns) ||
939 ((y+dy) < 0) || ((y+dy) >= (ssize_t) image->rows))
940 {
941 p+=(ptrdiff_t) GetPixelChannels(image);
942 continue;
943 }
944 neighbor_offset=dy*((ssize_t) GetPixelChannels(image)*(ssize_t)
945 image->columns)+dx*(ssize_t) GetPixelChannels(image);
946 GetPixelInfoPixel(image,p+neighbor_offset,&target);
947 if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
948 {
949 p+=(ptrdiff_t) GetPixelChannels(image);
950 continue;
951 }
952 /*
953 Resolve this equivalence.
954 */
955 offset=y*(ssize_t) image->columns+x;
956 neighbor_offset=dy*(ssize_t) image->columns+dx;
957 ox=offset;
958 status=GetMatrixElement(equivalences,ox,0,&obj);
959 while (obj != ox)
960 {
961 ox=obj;
962 status=GetMatrixElement(equivalences,ox,0,&obj);
963 }
964 oy=offset+neighbor_offset;
965 status=GetMatrixElement(equivalences,oy,0,&obj);
966 while (obj != oy)
967 {
968 oy=obj;
969 status=GetMatrixElement(equivalences,oy,0,&obj);
970 }
971 if (ox < oy)
972 {
973 status=SetMatrixElement(equivalences,oy,0,&ox);
974 root=ox;
975 }
976 else
977 {
978 status=SetMatrixElement(equivalences,ox,0,&oy);
979 root=oy;
980 }
981 ox=offset;
982 status=GetMatrixElement(equivalences,ox,0,&obj);
983 while (obj != root)
984 {
985 status=GetMatrixElement(equivalences,ox,0,&obj);
986 status=SetMatrixElement(equivalences,ox,0,&root);
987 }
988 oy=offset+neighbor_offset;
989 status=GetMatrixElement(equivalences,oy,0,&obj);
990 while (obj != root)
991 {
992 status=GetMatrixElement(equivalences,oy,0,&obj);
993 status=SetMatrixElement(equivalences,oy,0,&root);
994 }
995 status=SetMatrixElement(equivalences,y*(ssize_t) image->columns+x,0,
996 &root);
997 p+=(ptrdiff_t) GetPixelChannels(image);
998 }
999 }
1000 }
1001 /*
1002 Label connected components.
1003 */
1004 n=0;
1005 component_view=AcquireAuthenticCacheView(component_image,exception);
1006 for (y=0; y < (ssize_t) component_image->rows; y++)
1007 {
1008 const Quantum
1009 *magick_restrict p;
1010
1011 Quantum
1012 *magick_restrict q;
1013
1014 ssize_t
1015 x;
1016
1017 if (status == MagickFalse)
1018 continue;
1019 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1020 q=QueueCacheViewAuthenticPixels(component_view,0,y,component_image->columns,
1021 1,exception);
1022 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1023 {
1024 status=MagickFalse;
1025 continue;
1026 }
1027 for (x=0; x < (ssize_t) component_image->columns; x++)
1028 {
1029 ssize_t
1030 id,
1031 offset;
1032
1033 offset=y*(ssize_t) image->columns+x;
1034 status=GetMatrixElement(equivalences,offset,0,&id);
1035 if (id != offset)
1036 status=GetMatrixElement(equivalences,id,0,&id);
1037 else
1038 {
1039 id=n++;
1040 if (id >= (ssize_t) MaxColormapSize)
1041 break;
1042 }
1043 status=SetMatrixElement(equivalences,offset,0,&id);
1044 if (x < object[id].bounding_box.x)
1045 object[id].bounding_box.x=x;
1046 if (x >= (ssize_t) object[id].bounding_box.width)
1047 object[id].bounding_box.width=(size_t) x;
1048 if (y < object[id].bounding_box.y)
1049 object[id].bounding_box.y=y;
1050 if (y >= (ssize_t) object[id].bounding_box.height)
1051 object[id].bounding_box.height=(size_t) y;
1052 object[id].color.red+=QuantumScale*(double) GetPixelRed(image,p);
1053 object[id].color.green+=QuantumScale*(double) GetPixelGreen(image,p);
1054 object[id].color.blue+=QuantumScale*(double) GetPixelBlue(image,p);
1055 if (image->alpha_trait != UndefinedPixelTrait)
1056 object[id].color.alpha+=QuantumScale*(double) GetPixelAlpha(image,p);
1057 if (image->colorspace == CMYKColorspace)
1058 object[id].color.black+=QuantumScale*(double) GetPixelBlack(image,p);
1059 object[id].centroid.x+=x;
1060 object[id].centroid.y+=y;
1061 object[id].area++;
1062 SetPixelIndex(component_image,(Quantum) id,q);
1063 p+=(ptrdiff_t) GetPixelChannels(image);
1064 q+=(ptrdiff_t) GetPixelChannels(component_image);
1065 }
1066 if (n > (ssize_t) MaxColormapSize)
1067 break;
1068 if (SyncCacheViewAuthenticPixels(component_view,exception) == MagickFalse)
1069 status=MagickFalse;
1070 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1071 {
1072 MagickBooleanType
1073 proceed;
1074
1075 progress++;
1076 proceed=SetImageProgress(image,ConnectedComponentsImageTag,progress,
1077 image->rows);
1078 if (proceed == MagickFalse)
1079 status=MagickFalse;
1080 }
1081 }
1082 component_view=DestroyCacheView(component_view);
1083 image_view=DestroyCacheView(image_view);
1084 equivalences=DestroyMatrixInfo(equivalences);
1085 if (n > (ssize_t) MaxColormapSize)
1086 {
1087 object=(CCObjectInfo *) RelinquishMagickMemory(object);
1088 component_image=DestroyImage(component_image);
1089 ThrowImageException(ResourceLimitError,"TooManyObjects");
1090 }
1091 background_id=0;
1092 min_threshold=0.0;
1093 max_threshold=0.0;
1094 component_image->colors=(size_t) n;
1095 for (i=0; i < (ssize_t) component_image->colors; i++)
1096 {
1097 object[i].bounding_box.width=(size_t) ((ssize_t)
1098 object[i].bounding_box.width-(object[i].bounding_box.x-1));
1099 object[i].bounding_box.height=(size_t) ((ssize_t)
1100 object[i].bounding_box.height-(object[i].bounding_box.y-1));
1101 object[i].color.red/=(QuantumScale*object[i].area);
1102 object[i].color.green/=(QuantumScale*object[i].area);
1103 object[i].color.blue/=(QuantumScale*object[i].area);
1104 if (image->alpha_trait != UndefinedPixelTrait)
1105 object[i].color.alpha/=(QuantumScale*object[i].area);
1106 if (image->colorspace == CMYKColorspace)
1107 object[i].color.black/=(QuantumScale*object[i].area);
1108 object[i].centroid.x/=object[i].area;
1109 object[i].centroid.y/=object[i].area;
1110 max_threshold+=object[i].area;
1111 if (object[i].area > object[background_id].area)
1112 background_id=i;
1113 }
1114 max_threshold+=MagickEpsilon;
1115 n=(-1);
1116 artifact=GetImageArtifact(image,"connected-components:background-id");
1117 if (artifact != (const char *) NULL)
1118 background_id=(ssize_t) StringToLong(artifact);
1119 artifact=GetImageArtifact(image,"connected-components:area-threshold");
1120 if (artifact != (const char *) NULL)
1121 {
1122 /*
1123 Merge any object not within the min and max area threshold.
1124 */
1125 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1126 for (i=0; i < (ssize_t) component_image->colors; i++)
1127 if (((object[i].area < min_threshold) ||
1128 (object[i].area >= max_threshold)) && (i != background_id))
1129 object[i].merge=MagickTrue;
1130 }
1131 artifact=GetImageArtifact(image,"connected-components:keep-colors");
1132 if (artifact != (const char *) NULL)
1133 {
1134 const char
1135 *p;
1136
1137 /*
1138 Keep selected objects based on color, merge others.
1139 */
1140 for (i=0; i < (ssize_t) component_image->colors; i++)
1141 object[i].merge=MagickTrue;
1142 for (p=artifact; ; )
1143 {
1144 char
1145 color[MagickPathExtent];
1146
1147 PixelInfo
1148 pixel;
1149
1150 const char
1151 *q;
1152
1153 for (q=p; *q != '\0'; q++)
1154 if (*q == ';')
1155 break;
1156 (void) CopyMagickString(color,p,(size_t) MagickMin(q-p+1,
1157 MagickPathExtent));
1158 (void) QueryColorCompliance(color,AllCompliance,&pixel,exception);
1159 for (i=0; i < (ssize_t) component_image->colors; i++)
1160 if (IsFuzzyEquivalencePixelInfo(&object[i].color,&pixel) != MagickFalse)
1161 object[i].merge=MagickFalse;
1162 if (*q == '\0')
1163 break;
1164 p=q+1;
1165 }
1166 }
1167 artifact=GetImageArtifact(image,"connected-components:keep-ids");
1168 if (artifact == (const char *) NULL)
1169 artifact=GetImageArtifact(image,"connected-components:keep");
1170 if (artifact != (const char *) NULL)
1171 {
1172 /*
1173 Keep selected objects based on id, merge others.
1174 */
1175 for (i=0; i < (ssize_t) component_image->colors; i++)
1176 object[i].merge=MagickTrue;
1177 for (c=(char *) artifact; *c != '\0'; )
1178 {
1179 while ((isspace((int) ((unsigned char) *c)) != 0) || (*c == ','))
1180 c++;
1181 d=c;
1182 first=(ssize_t) strtol(c,&d,10);
1183 if (d == c)
1184 break;
1185 c=d;
1186 if (first < 0)
1187 first+=(ssize_t) component_image->colors;
1188 last=first;
1189 while (isspace((int) ((unsigned char) *c)) != 0)
1190 c++;
1191 if (*c == '-')
1192 {
1193 last=(ssize_t) strtol(c+1,&c,10);
1194 if (last < 0)
1195 last+=(ssize_t) component_image->colors;
1196 }
1197 step=(ssize_t) (first > last ? -1 : 1);
1198 for ( ; first != (last+step); first+=step)
1199 if ((first >= 0) &&
1200 (first < (ssize_t) component_image->colors))
1201 object[first].merge=MagickFalse;
1202 }
1203 }
1204 artifact=GetImageArtifact(image,"connected-components:keep-top");
1205 if (artifact != (const char *) NULL)
1206 {
1207 CCObjectInfo
1208 *top_objects;
1209
1210 ssize_t
1211 top_ids;
1212
1213 /*
1214 Keep top objects.
1215 */
1216 top_ids=(ssize_t) StringToLong(artifact);
1217 if (top_ids < 0)
1218 top_ids=0;
1219 if (top_ids >= (ssize_t) component_image->colors)
1220 top_ids=(ssize_t) component_image->colors-1;
1221 top_objects=(CCObjectInfo *) AcquireQuantumMemory(component_image->colors,
1222 sizeof(*top_objects));
1223 if (top_objects == (CCObjectInfo *) NULL)
1224 {
1225 object=(CCObjectInfo *) RelinquishMagickMemory(object);
1226 component_image=DestroyImage(component_image);
1227 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1228 }
1229 (void) memcpy(top_objects,object,component_image->colors*sizeof(*object));
1230 qsort((void *) top_objects,component_image->colors,sizeof(*top_objects),
1231 CCObjectInfoCompare);
1232 for (i=top_ids+1; i < (ssize_t) component_image->colors; i++)
1233 {
1234 ssize_t id = (ssize_t) top_objects[i].id;
1235 if ((id >= 0) && (id < (ssize_t) component_image->colors))
1236 object[id].merge=MagickTrue;
1237 }
1238 top_objects=(CCObjectInfo *) RelinquishMagickMemory(top_objects);
1239 }
1240 artifact=GetImageArtifact(image,"connected-components:remove-colors");
1241 if (artifact != (const char *) NULL)
1242 {
1243 const char
1244 *p;
1245
1246 /*
1247 Remove selected objects based on color, keep others.
1248 */
1249 for (p=artifact; ; )
1250 {
1251 char
1252 color[MagickPathExtent];
1253
1254 PixelInfo
1255 pixel;
1256
1257 const char
1258 *q;
1259
1260 for (q=p; *q != '\0'; q++)
1261 if (*q == ';')
1262 break;
1263 (void) CopyMagickString(color,p,(size_t) MagickMin(q-p+1,
1264 MagickPathExtent));
1265 (void) QueryColorCompliance(color,AllCompliance,&pixel,exception);
1266 for (i=0; i < (ssize_t) component_image->colors; i++)
1267 if (IsFuzzyEquivalencePixelInfo(&object[i].color,&pixel) != MagickFalse)
1268 object[i].merge=MagickTrue;
1269 if (*q == '\0')
1270 break;
1271 p=q+1;
1272 }
1273 }
1274 artifact=GetImageArtifact(image,"connected-components:remove-ids");
1275 if (artifact == (const char *) NULL)
1276 artifact=GetImageArtifact(image,"connected-components:remove");
1277 if (artifact != (const char *) NULL)
1278 for (c=(char *) artifact; *c != '\0'; )
1279 {
1280 /*
1281 Remove selected objects based on id, keep others.
1282 */
1283 while ((isspace((int) ((unsigned char) *c)) != 0) || (*c == ','))
1284 c++;
1285 d=c;
1286 first=(ssize_t) strtol(c,&d,10);
1287 if (d == c)
1288 break;
1289 c=d;
1290 if (first < 0)
1291 first+=(ssize_t) component_image->colors;
1292 last=first;
1293 while (isspace((int) ((unsigned char) *c)) != 0)
1294 c++;
1295 if (*c == '-')
1296 {
1297 last=(ssize_t) strtol(c+1,&c,10);
1298 if (last < 0)
1299 last+=(ssize_t) component_image->colors;
1300 }
1301 step=(ssize_t) (first > last ? -1 : 1);
1302 for ( ; first != (last+step); first+=step)
1303 if ((first >= 0) &&
1304 (first < (ssize_t) component_image->colors))
1305 object[first].merge=MagickTrue;
1306 }
1307 artifact=GetImageArtifact(image,"connected-components:perimeter-threshold");
1308 if (artifact != (const char *) NULL)
1309 {
1310 /*
1311 Merge any object not within the min and max perimeter threshold.
1312 */
1313 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1314 metrics[++n]="perimeter";
1315 PerimeterThreshold(component_image,object,n,exception);
1316 for (i=0; i < (ssize_t) component_image->colors; i++)
1317 if (((object[i].metric[n] < min_threshold) ||
1318 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1319 object[i].merge=MagickTrue;
1320 }
1321 artifact=GetImageArtifact(image,"connected-components:circularity-threshold");
1322 if (artifact != (const char *) NULL)
1323 {
1324 /*
1325 Merge any object not within the min and max circularity threshold.
1326 */
1327 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1328 metrics[++n]="circularity";
1329 CircularityThreshold(component_image,object,n,exception);
1330 for (i=0; i < (ssize_t) component_image->colors; i++)
1331 if (((object[i].metric[n] < min_threshold) ||
1332 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1333 object[i].merge=MagickTrue;
1334 }
1335 artifact=GetImageArtifact(image,"connected-components:diameter-threshold");
1336 if (artifact != (const char *) NULL)
1337 {
1338 /*
1339 Merge any object not within the min and max diameter threshold.
1340 */
1341 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1342 metrics[++n]="diameter";
1343 for (i=0; i < (ssize_t) component_image->colors; i++)
1344 {
1345 object[i].metric[n]=ceil(sqrt(4.0*object[i].area/MagickPI)-0.5);
1346 if (((object[i].metric[n] < min_threshold) ||
1347 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1348 object[i].merge=MagickTrue;
1349 }
1350 }
1351 artifact=GetImageArtifact(image,"connected-components:major-axis-threshold");
1352 if (artifact != (const char *) NULL)
1353 {
1354 /*
1355 Merge any object not within the min and max ellipse major threshold.
1356 */
1357 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1358 metrics[++n]="major-axis";
1359 MajorAxisThreshold(component_image,object,n,exception);
1360 for (i=0; i < (ssize_t) component_image->colors; i++)
1361 if (((object[i].metric[n] < min_threshold) ||
1362 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1363 object[i].merge=MagickTrue;
1364 }
1365 artifact=GetImageArtifact(image,"connected-components:minor-axis-threshold");
1366 if (artifact != (const char *) NULL)
1367 {
1368 /*
1369 Merge any object not within the min and max ellipse minor threshold.
1370 */
1371 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1372 metrics[++n]="minor-axis";
1373 MinorAxisThreshold(component_image,object,n,exception);
1374 for (i=0; i < (ssize_t) component_image->colors; i++)
1375 if (((object[i].metric[n] < min_threshold) ||
1376 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1377 object[i].merge=MagickTrue;
1378 }
1379 artifact=GetImageArtifact(image,"connected-components:eccentricity-threshold");
1380 if (artifact != (const char *) NULL)
1381 {
1382 /*
1383 Merge any object not within the min and max eccentricity threshold.
1384 */
1385 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1386 metrics[++n]="eccentricity";
1387 EccentricityThreshold(component_image,object,n,exception);
1388 for (i=0; i < (ssize_t) component_image->colors; i++)
1389 if (((object[i].metric[n] < min_threshold) ||
1390 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1391 object[i].merge=MagickTrue;
1392 }
1393 artifact=GetImageArtifact(image,"connected-components:angle-threshold");
1394 if (artifact != (const char *) NULL)
1395 {
1396 /*
1397 Merge any object not within the min and max ellipse angle threshold.
1398 */
1399 (void) MagickSscanf(artifact,"%lf%*[ -]%lf",&min_threshold,&max_threshold);
1400 metrics[++n]="angle";
1401 AngleThreshold(component_image,object,n,exception);
1402 for (i=0; i < (ssize_t) component_image->colors; i++)
1403 if (((object[i].metric[n] < min_threshold) ||
1404 (object[i].metric[n] >= max_threshold)) && (i != background_id))
1405 object[i].merge=MagickTrue;
1406 }
1407 /*
1408 Merge any object not within the min and max area threshold.
1409 */
1410 component_view=AcquireAuthenticCacheView(component_image,exception);
1411 object_view=AcquireVirtualCacheView(component_image,exception);
1412 (void) SetCacheViewVirtualPixelMethod(object_view,TileVirtualPixelMethod);
1413 for (i=0; i < (ssize_t) component_image->colors; i++)
1414 {
1415 RectangleInfo
1416 bounding_box;
1417
1418 size_t
1419 id;
1420
1421 ssize_t
1422 j;
1423
1424 if (status == MagickFalse)
1425 continue;
1426 if ((object[i].merge == MagickFalse) || (i == background_id))
1427 continue; /* keep object */
1428 /*
1429 Merge this object.
1430 */
1431 for (j=0; j < (ssize_t) component_image->colors; j++)
1432 object[j].census=0;
1433 bounding_box=object[i].bounding_box;
1434 for (y=0; y < (ssize_t) bounding_box.height; y++)
1435 {
1436 const Quantum
1437 *magick_restrict p;
1438
1439 ssize_t
1440 x;
1441
1442 if (status == MagickFalse)
1443 continue;
1444 p=GetCacheViewVirtualPixels(component_view,bounding_box.x,
1445 bounding_box.y+y,bounding_box.width,1,exception);
1446 if (p == (const Quantum *) NULL)
1447 {
1448 status=MagickFalse;
1449 continue;
1450 }
1451 for (x=0; x < (ssize_t) bounding_box.width; x++)
1452 {
1453 ssize_t
1454 k;
1455
1456 if (status == MagickFalse)
1457 continue;
1458 j=(ssize_t) GetPixelIndex(component_image,p);
1459 if (j == i)
1460 for (k=0; k < (ssize_t) (connectivity > 4 ? 4 : 2); k++)
1461 {
1462 const Quantum
1463 *q;
1464
1465 /*
1466 Compute area of adjacent objects.
1467 */
1468 if (status == MagickFalse)
1469 continue;
1470 dx=connectivity > 4 ? connect8[k][1] : connect4[k][1];
1471 dy=connectivity > 4 ? connect8[k][0] : connect4[k][0];
1472 q=GetCacheViewVirtualPixels(object_view,bounding_box.x+x+dx,
1473 bounding_box.y+y+dy,1,1,exception);
1474 if (q == (const Quantum *) NULL)
1475 {
1476 status=MagickFalse;
1477 break;
1478 }
1479 j=(ssize_t) GetPixelIndex(component_image,q);
1480 if (j != i)
1481 object[j].census++;
1482 }
1483 p+=(ptrdiff_t) GetPixelChannels(component_image);
1484 }
1485 }
1486 /*
1487 Merge with object of greatest adjacent area.
1488 */
1489 id=0;
1490 for (j=1; j < (ssize_t) component_image->colors; j++)
1491 if (object[j].census > object[id].census)
1492 id=(size_t) j;
1493 object[i].area=0.0;
1494 for (y=0; y < (ssize_t) bounding_box.height; y++)
1495 {
1496 Quantum
1497 *magick_restrict q;
1498
1499 ssize_t
1500 x;
1501
1502 if (status == MagickFalse)
1503 continue;
1504 q=GetCacheViewAuthenticPixels(component_view,bounding_box.x,
1505 bounding_box.y+y,bounding_box.width,1,exception);
1506 if (q == (Quantum *) NULL)
1507 {
1508 status=MagickFalse;
1509 continue;
1510 }
1511 for (x=0; x < (ssize_t) bounding_box.width; x++)
1512 {
1513 if ((ssize_t) GetPixelIndex(component_image,q) == i)
1514 SetPixelIndex(component_image,(Quantum) id,q);
1515 q+=(ptrdiff_t) GetPixelChannels(component_image);
1516 }
1517 if (SyncCacheViewAuthenticPixels(component_view,exception) == MagickFalse)
1518 status=MagickFalse;
1519 }
1520 }
1521 object_view=DestroyCacheView(object_view);
1522 component_view=DestroyCacheView(component_view);
1523 artifact=GetImageArtifact(image,"connected-components:mean-color");
1524 if (IsStringTrue(artifact) != MagickFalse)
1525 {
1526 /*
1527 Replace object with mean color.
1528 */
1529 for (i=0; i < (ssize_t) component_image->colors; i++)
1530 component_image->colormap[i]=object[i].color;
1531 }
1532 (void) SyncImage(component_image,exception);
1533 artifact=GetImageArtifact(image,"connected-components:verbose");
1534 if ((IsStringTrue(artifact) != MagickFalse) ||
1535 (objects != (CCObjectInfo **) NULL))
1536 {
1537 ssize_t
1538 key,
1539 order;
1540
1541 /*
1542 Report statistics on each unique object.
1543 */
1544 for (i=0; i < (ssize_t) component_image->colors; i++)
1545 {
1546 object[i].bounding_box.width=0;
1547 object[i].bounding_box.height=0;
1548 object[i].bounding_box.x=(ssize_t) component_image->columns;
1549 object[i].bounding_box.y=(ssize_t) component_image->rows;
1550 object[i].centroid.x=0;
1551 object[i].centroid.y=0;
1552 object[i].census=object[i].area == 0.0 ? 0.0 : 1.0;
1553 object[i].area=0;
1554 }
1555 component_view=AcquireVirtualCacheView(component_image,exception);
1556 for (y=0; y < (ssize_t) component_image->rows; y++)
1557 {
1558 const Quantum
1559 *magick_restrict p;
1560
1561 ssize_t
1562 x;
1563
1564 if (status == MagickFalse)
1565 continue;
1566 p=GetCacheViewVirtualPixels(component_view,0,y,component_image->columns,
1567 1,exception);
1568 if (p == (const Quantum *) NULL)
1569 {
1570 status=MagickFalse;
1571 continue;
1572 }
1573 for (x=0; x < (ssize_t) component_image->columns; x++)
1574 {
1575 size_t
1576 id;
1577
1578 id=(size_t) GetPixelIndex(component_image,p);
1579 if (x < object[id].bounding_box.x)
1580 object[id].bounding_box.x=x;
1581 if (x > (ssize_t) object[id].bounding_box.width)
1582 object[id].bounding_box.width=(size_t) x;
1583 if (y < object[id].bounding_box.y)
1584 object[id].bounding_box.y=y;
1585 if (y > (ssize_t) object[id].bounding_box.height)
1586 object[id].bounding_box.height=(size_t) y;
1587 object[id].centroid.x+=x;
1588 object[id].centroid.y+=y;
1589 object[id].area++;
1590 p+=(ptrdiff_t) GetPixelChannels(component_image);
1591 }
1592 }
1593 for (i=0; i < (ssize_t) component_image->colors; i++)
1594 {
1595 object[i].bounding_box.width=(size_t) ((ssize_t)
1596 object[i].bounding_box.width-(object[i].bounding_box.x-1));
1597 object[i].bounding_box.height=(size_t) ((ssize_t)
1598 object[i].bounding_box.height-(object[i].bounding_box.y-1));
1599 object[i].centroid.x=object[i].centroid.x/object[i].area;
1600 object[i].centroid.y=object[i].centroid.y/object[i].area;
1601 }
1602 component_view=DestroyCacheView(component_view);
1603 order=1;
1604 artifact=GetImageArtifact(image,"connected-components:sort-order");
1605 if (artifact != (const char *) NULL)
1606 if (LocaleCompare(artifact,"decreasing") == 0)
1607 order=(-1);
1608 key=0;
1609 artifact=GetImageArtifact(image,"connected-components:sort");
1610 if (artifact != (const char *) NULL)
1611 {
1612 if (LocaleCompare(artifact,"area") == 0)
1613 key=1;
1614 if (LocaleCompare(artifact,"width") == 0)
1615 key=2;
1616 if (LocaleCompare(artifact,"height") == 0)
1617 key=3;
1618 if (LocaleCompare(artifact,"x") == 0)
1619 key=4;
1620 if (LocaleCompare(artifact,"y") == 0)
1621 key=5;
1622 }
1623 for (i=0; i < (ssize_t) component_image->colors; i++)
1624 object[i].key=order*key;
1625 qsort((void *) object,component_image->colors,sizeof(*object),
1626 CCObjectInfoCompare);
1627 if (objects == (CCObjectInfo **) NULL)
1628 {
1629 ssize_t
1630 j;
1631
1632 artifact=GetImageArtifact(image,
1633 "connected-components:exclude-header");
1634 if (IsStringTrue(artifact) == MagickFalse)
1635 {
1636 (void) fprintf(stdout,"Objects (");
1637 artifact=GetImageArtifact(image,
1638 "connected-components:exclude-ids");
1639 if (IsStringTrue(artifact) == MagickFalse)
1640 (void) fprintf(stdout,"id: ");
1641 (void) fprintf(stdout,"bounding-box centroid area mean-color");
1642 for (j=0; j <= n; j++)
1643 (void) fprintf(stdout," %s",metrics[j]);
1644 (void) fprintf(stdout,"):\n");
1645 }
1646 for (i=0; i < (ssize_t) component_image->colors; i++)
1647 if (object[i].census > 0.0)
1648 {
1649 char
1650 mean_color[MagickPathExtent];
1651
1652 GetColorTuple(&object[i].color,MagickFalse,mean_color);
1653 (void) fprintf(stdout," ");
1654 artifact=GetImageArtifact(image,
1655 "connected-components:exclude-ids");
1656 if (IsStringTrue(artifact) == MagickFalse)
1657 (void) fprintf(stdout,"%.20g: ",(double) object[i].id);
1658 (void) fprintf(stdout,
1659 "%.20gx%.20g%+.20g%+.20g %.1f,%.1f %.*g %s",(double)
1660 object[i].bounding_box.width,(double)
1661 object[i].bounding_box.height,(double)
1662 object[i].bounding_box.x,(double) object[i].bounding_box.y,
1663 object[i].centroid.x,object[i].centroid.y,
1664 GetMagickPrecision(),(double) object[i].area,mean_color);
1665 for (j=0; j <= n; j++)
1666 (void) fprintf(stdout," %.*g",GetMagickPrecision(),
1667 object[i].metric[j]);
1668 (void) fprintf(stdout,"\n");
1669 }
1670 }
1671 }
1672 if (objects == (CCObjectInfo **) NULL)
1673 object=(CCObjectInfo *) RelinquishMagickMemory(object);
1674 else
1675 *objects=object;
1676 return(component_image);
1677}
1678␌
1679/*
1680%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1681% %
1682% %
1683% %
1684% I n t e g r a l I m a g e %
1685% %
1686% %
1687% %
1688%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1689%
1690% IntegralImage() returns the sum of values (pixel values) in the image.
1691%
1692% The format of the IntegralImage method is:
1693%
1694% Image *IntegralImage(const Image *image,ExceptionInfo *exception)
1695%
1696% A description of each parameter follows:
1697%
1698% o image: the image.
1699%
1700% o exception: return any errors or warnings in this structure.
1701%
1702*/
1703MagickExport Image *IntegralImage(const Image *image,ExceptionInfo *exception)
1704{
1705#define IntegralImageTag "Integral/Image"
1706
1707 CacheView
1708 *image_view,
1709 *integral_view;
1710
1711 Image
1712 *integral_image;
1713
1714 MagickBooleanType
1715 status;
1716
1717 MagickOffsetType
1718 progress;
1719
1720 ssize_t
1721 y;
1722
1723 /*
1724 Initialize integral image.
1725 */
1726 assert(image != (const Image *) NULL);
1727 assert(image->signature == MagickCoreSignature);
1728 assert(exception != (ExceptionInfo *) NULL);
1729 assert(exception->signature == MagickCoreSignature);
1730 if (IsEventLogging() != MagickFalse)
1731 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1732 integral_image=CloneImage(image,0,0,MagickTrue,exception);
1733 if (integral_image == (Image *) NULL)
1734 return((Image *) NULL);
1735 if (SetImageStorageClass(integral_image,DirectClass,exception) == MagickFalse)
1736 {
1737 integral_image=DestroyImage(integral_image);
1738 return((Image *) NULL);
1739 }
1740 /*
1741 Calculate the sum of values (pixel values) in the image.
1742 */
1743 status=MagickTrue;
1744 progress=0;
1745 image_view=AcquireVirtualCacheView(integral_image,exception);
1746 integral_view=AcquireAuthenticCacheView(integral_image,exception);
1747 for (y=0; y < (ssize_t) integral_image->rows; y++)
1748 {
1749 const Quantum
1750 *magick_restrict p;
1751
1752 MagickBooleanType
1753 sync;
1754
1755 Quantum
1756 *magick_restrict q;
1757
1758 ssize_t
1759 x;
1760
1761 if (status == MagickFalse)
1762 continue;
1763 p=GetCacheViewVirtualPixels(integral_view,0,y-1,integral_image->columns,1,
1764 exception);
1765 q=GetCacheViewAuthenticPixels(integral_view,0,y,integral_image->columns,1,
1766 exception);
1767 if ((p == (const Quantum *) NULL) || (p == (Quantum *) NULL))
1768 {
1769 status=MagickFalse;
1770 continue;
1771 }
1772 for (x=0; x < (ssize_t) integral_image->columns; x++)
1773 {
1774 ssize_t
1775 i;
1776
1777 for (i=0; i < (ssize_t) GetPixelChannels(integral_image); i++)
1778 {
1779 double
1780 sum;
1781
1782 PixelTrait traits = GetPixelChannelTraits(integral_image,
1783 (PixelChannel) i);
1784 if (traits == UndefinedPixelTrait)
1785 continue;
1786 if ((traits & CopyPixelTrait) != 0)
1787 continue;
1788 sum=(double) q[i];
1789 if (x > 0)
1790 sum+=(double) (q-GetPixelChannels(integral_image))[i];
1791 if (y > 0)
1792 sum+=(double) p[i];
1793 if ((x > 0) && (y > 0))
1794 sum-=(double) (p-GetPixelChannels(integral_image))[i];
1795 q[i]=ClampToQuantum(sum);
1796 }
1797 p+=(ptrdiff_t) GetPixelChannels(integral_image);
1798 q+=(ptrdiff_t) GetPixelChannels(integral_image);
1799 }
1800 sync=SyncCacheViewAuthenticPixels(integral_view,exception);
1801 if (sync == MagickFalse)
1802 status=MagickFalse;
1803 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1804 {
1805 MagickBooleanType
1806 proceed;
1807
1808 progress++;
1809 proceed=SetImageProgress(integral_image,IntegralImageTag,progress,
1810 integral_image->rows);
1811 if (proceed == MagickFalse)
1812 status=MagickFalse;
1813 }
1814 }
1815 integral_view=DestroyCacheView(integral_view);
1816 image_view=DestroyCacheView(image_view);
1817 if (status == MagickFalse)
1818 integral_image=DestroyImage(integral_image);
1819 return(integral_image);
1820}