1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % AAA N N AAA L Y Y ZZZZZ EEEEE %
6 % A A NN N A A L Y Y ZZ E %
7 % AAAAA N N N AAAAA L Y ZZZ EEE %
8 % A A N NN A A L Y ZZ E %
9 % A A N N A A LLLLL Y ZZZZZ EEEEE %
10 % %
11 % Analyze An Image %
12 % %
13 % Software Design %
14 % Bill Corbis %
15 % December 1998 %
16 % %
17 % %
18 % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization %
19 % dedicated to making software imaging solutions freely available. %
20 % %
21 % You may not use this file except in compliance with the License. You may %
22 % obtain a copy of the License at %
23 % %
24 % https://imagemagick.org/script/license.php %
25 % %
26 % Unless required by applicable law or agreed to in writing, software %
27 % distributed under the License is distributed on an "AS IS" BASIS, %
28 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
29 % See the License for the specific language governing permissions and %
30 % limitations under the License. %
31 % %
32 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
33 %
34 */
35
36 /*
37 Include declarations.
38 */
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <time.h>
43 #include <assert.h>
44 #include <math.h>
45 #include "magick/MagickCore.h"
46
47 /*
48 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
49 % %
50 % %
51 % %
52 % a n a l y z e I m a g e %
53 % %
54 % %
55 % %
56 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
57 %
58 % analyzeImage() computes the brightness and saturation mean, standard
59 % deviation, kurtosis and skewness and stores these values as attributes
60 % of the image.
61 %
62 % The format of the analyzeImage method is:
63 %
64 % size_t analyzeImage(Image *images,const int argc,
65 % char **argv,ExceptionInfo *exception)
66 %
67 % A description of each parameter follows:
68 %
69 % o image: the address of a structure of type Image.
70 %
71 % o argc: Specifies a pointer to an integer describing the number of
72 % elements in the argument vector.
73 %
74 % o argv: Specifies a pointer to a text array containing the command line
75 % arguments.
76 %
77 % o exception: return any errors or warnings in this structure.
78 %
79 */
analyzeImage(Image ** images,const int argc,const char ** argv,ExceptionInfo * exception)80 ModuleExport size_t analyzeImage(Image **images,const int argc,
81 const char **argv,ExceptionInfo *exception)
82 {
83 char
84 text[MaxTextExtent];
85
86 double
87 area,
88 brightness,
89 brightness_mean,
90 brightness_standard_deviation,
91 brightness_kurtosis,
92 brightness_skewness,
93 brightness_sum_x,
94 brightness_sum_x2,
95 brightness_sum_x3,
96 brightness_sum_x4,
97 hue,
98 saturation,
99 saturation_mean,
100 saturation_standard_deviation,
101 saturation_kurtosis,
102 saturation_skewness,
103 saturation_sum_x,
104 saturation_sum_x2,
105 saturation_sum_x3,
106 saturation_sum_x4;
107
108 Image
109 *image;
110
111 assert(images != (Image **) NULL);
112 assert(*images != (Image *) NULL);
113 assert((*images)->signature == MagickSignature);
114 (void) argc;
115 (void) argv;
116 image=(*images);
117 for ( ; image != (Image *) NULL; image=GetNextImageInList(image))
118 {
119 CacheView
120 *image_view;
121
122 MagickBooleanType
123 status;
124
125 ssize_t
126 y;
127
128 brightness_sum_x=0.0;
129 brightness_sum_x2=0.0;
130 brightness_sum_x3=0.0;
131 brightness_sum_x4=0.0;
132 brightness_mean=0.0;
133 brightness_standard_deviation=0.0;
134 brightness_kurtosis=0.0;
135 brightness_skewness=0.0;
136 saturation_sum_x=0.0;
137 saturation_sum_x2=0.0;
138 saturation_sum_x3=0.0;
139 saturation_sum_x4=0.0;
140 saturation_mean=0.0;
141 saturation_standard_deviation=0.0;
142 saturation_kurtosis=0.0;
143 saturation_skewness=0.0;
144 area=0.0;
145 status=MagickTrue;
146 image_view=AcquireCacheView(image);
147 #if defined(MAGICKCORE_OPENMP_SUPPORT)
148 #pragma omp parallel for schedule(dynamic,4) shared(status)
149 #endif
150 for (y=0; y < (ssize_t) image->rows; y++)
151 {
152 register const PixelPacket
153 *p;
154
155 register ssize_t
156 x;
157
158 if (status == MagickFalse)
159 continue;
160 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
161 if (p == (const PixelPacket *) NULL)
162 {
163 status=MagickFalse;
164 continue;
165 }
166 for (x=0; x < (ssize_t) image->columns; x++)
167 {
168 ConvertRGBToHSB(GetPixelRed(p),GetPixelGreen(p),
169 GetPixelBlue(p),&hue,&saturation,&brightness);
170 brightness*=QuantumRange;
171 brightness_sum_x+=brightness;
172 brightness_sum_x2+=brightness*brightness;
173 brightness_sum_x3+=brightness*brightness*brightness;
174 brightness_sum_x4+=brightness*brightness*brightness*brightness;
175 saturation*=QuantumRange;
176 saturation_sum_x+=saturation;
177 saturation_sum_x2+=saturation*saturation;
178 saturation_sum_x3+=saturation*saturation*saturation;
179 saturation_sum_x4+=saturation*saturation*saturation*saturation;
180 area++;
181 p++;
182 }
183 }
184 image_view=DestroyCacheView(image_view);
185 if (area <= 0.0)
186 break;
187 brightness_mean=brightness_sum_x/area;
188 (void) FormatMagickString(text,MaxTextExtent,"%g",brightness_mean);
189 (void) SetImageProperty(image,"filter:brightness:mean",text);
190 brightness_standard_deviation=sqrt(brightness_sum_x2/area-(brightness_sum_x/
191 area*brightness_sum_x/area));
192 (void) FormatMagickString(text,MaxTextExtent,"%g",
193 brightness_standard_deviation);
194 (void) SetImageProperty(image,"filter:brightness:standard-deviation",text);
195 if (brightness_standard_deviation != 0)
196 brightness_kurtosis=(brightness_sum_x4/area-4.0*brightness_mean*
197 brightness_sum_x3/area+6.0*brightness_mean*brightness_mean*
198 brightness_sum_x2/area-3.0*brightness_mean*brightness_mean*
199 brightness_mean*brightness_mean)/(brightness_standard_deviation*
200 brightness_standard_deviation*brightness_standard_deviation*
201 brightness_standard_deviation)-3.0;
202 (void) FormatMagickString(text,MaxTextExtent,"%g",brightness_kurtosis);
203 (void) SetImageProperty(image,"filter:brightness:kurtosis",text);
204 if (brightness_standard_deviation != 0)
205 brightness_skewness=(brightness_sum_x3/area-3.0*brightness_mean*
206 brightness_sum_x2/area+2.0*brightness_mean*brightness_mean*
207 brightness_mean)/(brightness_standard_deviation*
208 brightness_standard_deviation*brightness_standard_deviation);
209 (void) FormatMagickString(text,MaxTextExtent,"%g",brightness_skewness);
210 (void) SetImageProperty(image,"filter:brightness:skewness",text);
211 saturation_mean=saturation_sum_x/area;
212 (void) FormatMagickString(text,MaxTextExtent,"%g",saturation_mean);
213 (void) SetImageProperty(image,"filter:saturation:mean",text);
214 saturation_standard_deviation=sqrt(saturation_sum_x2/area-(saturation_sum_x/
215 area*saturation_sum_x/area));
216 (void) FormatMagickString(text,MaxTextExtent,"%g",
217 saturation_standard_deviation);
218 (void) SetImageProperty(image,"filter:saturation:standard-deviation",text);
219 if (saturation_standard_deviation != 0)
220 saturation_kurtosis=(saturation_sum_x4/area-4.0*saturation_mean*
221 saturation_sum_x3/area+6.0*saturation_mean*saturation_mean*
222 saturation_sum_x2/area-3.0*saturation_mean*saturation_mean*
223 saturation_mean*saturation_mean)/(saturation_standard_deviation*
224 saturation_standard_deviation*saturation_standard_deviation*
225 saturation_standard_deviation)-3.0;
226 (void) FormatMagickString(text,MaxTextExtent,"%g",saturation_kurtosis);
227 (void) SetImageProperty(image,"filter:saturation:kurtosis",text);
228 if (saturation_standard_deviation != 0)
229 saturation_skewness=(saturation_sum_x3/area-3.0*saturation_mean*
230 saturation_sum_x2/area+2.0*saturation_mean*saturation_mean*
231 saturation_mean)/(saturation_standard_deviation*
232 saturation_standard_deviation*saturation_standard_deviation);
233 (void) FormatMagickString(text,MaxTextExtent,"%g",saturation_skewness);
234 (void) SetImageProperty(image,"filter:saturation:skewness",text);
235 }
236 return(MagickImageFilterSignature);
237 }
238