1 2 3 4 5<!DOCTYPE html> 6<html lang="en"> 7<head> 8 <meta charset="utf-8" /> 9 <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1,shrink-to-fit=no" /> 10 <title>ImageMagick - MagickCore, C API: Image Statistics</title> 11 <meta name="application-name" content="ImageMagick" /> 12 <meta name="description" content="Use ImageMagick® to create, edit, compose, and convert bitmap images. Resize an image, crop it, change its shades and colors, add captions, and more." /> 13 <meta name="application-url" content="https://imagemagick.org" /> 14 <meta name="generator" content="PHP" /> 15 <meta name="keywords" content="magickcore, c, api:, image, statistics, ImageMagick, PerlMagick, image processing, image, photo, software, Magick++, OpenMP, convert" /> 16 <meta name="rating" content="GENERAL" /> 17 <meta name="robots" content="INDEX, FOLLOW" /> 18 <meta name="generator" content="ImageMagick Studio LLC" /> 19 <meta name="author" content="ImageMagick Studio LLC" /> 20 <meta name="revisit-after" content="2 DAYS" /> 21 <meta name="resource-type" content="document" /> 22 <meta name="copyright" content="Copyright (c) 1999-2020 ImageMagick Studio LLC" /> 23 <meta name="distribution" content="Global" /> 24 <meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1" /> 25 <meta property='og:url' content='../../' /> 26 <meta property='og:title' content='ImageMagick' /> 27 <meta property='og:image' content='../../images/logo.png' /> 28 <meta property='og:type' content='website' /> 29 <meta property='og:site_name' content='ImageMagick' /> 30 <meta property='og:description' content="Convert, Edit, or Compose Bitmap Images" /> 31 <meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" /> 32 <link href="statistic.html" rel="canonical" /> 33 <link href="../../images/wand.png" rel="icon" /> 34 <link href="../../images/wand.ico" rel="shortcut icon" /> 35 <link href="../assets/magick.css" rel="stylesheet" /> 36</head> 37<body> 38 <nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark"> 39 <a class="navbar-brand" href="../../"><img class="d-block" id="icon" alt="ImageMagick" width="32" height="32" src="../../images/wand.ico"/></a> 40 <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsMagick" aria-controls="navbarsMagick" aria-expanded="false" aria-label="Toggle navigation"> 41 <span class="navbar-toggler-icon"></span> 42 </button> 43 44 <div class="navbar-collapse collapse" id="navbarsMagick" style=""> 45 <ul class="navbar-nav mr-auto"> 46 <li class="nav-item "> 47 <a class="nav-link" href="../../">Home <span class="sr-only">(current)</span></a> 48 </li> 49 <li class="nav-item "> 50 <a class="nav-link" href="../../www/download.html">Download</a> 51 </li> 52 <li class="nav-item "> 53 <a class="nav-link" href="../../www/command-line-tools.html">Tools</a> 54 </li> 55 <li class="nav-item "> 56 <a class="nav-link" href="../../www/command-line-processing.html">Command-line</a> 57 </li> 58 <li class="nav-item "> 59 <a class="nav-link" href="../../www/resources.html">Resources</a> 60 </li> 61 <li class="nav-item "> 62 <a class="nav-link" href="../../www/develop.html">Develop</a> 63 </li> 64 <li class="nav-item"> 65 <a class="nav-link" target="_blank" href="https://imagemagick.org/discourse-server/">Community</a> 66 </li> 67 </ul> 68 <form class="form-inline my-2 my-lg-0" action="../https://imagemagick.org/script/search.php"> 69 <input class="form-control mr-sm-2" type="text" name="q" placeholder="Search" aria-label="Search"> 70 <button class="btn btn-outline-success my-2 my-sm-0" type="submit" name="sa">Search</button> 71 </form> 72 </div> 73 </nav> 74 <div class="container"> 75 <script async="async" src="https://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" 76 style="display:block" 77 data-ad-client="ca-pub-3129977114552745" 78 data-ad-slot="6345125851" 79 data-full-width-responsive="true" 80 data-ad-format="horizontal"></ins> 81 <script> 82 (adsbygoogle = window.adsbygoogle || []).push({}); 83 </script> 84 85 </div> 86 87 <main class="container"> 88 <div class="magick-template"> 89<div class="magick-header"> 90<p class="text-center"><a href="statistic.html#EvaluateImage">EvaluateImage</a> • <a href="statistic.html#FunctionImage">FunctionImage</a> • <a href="statistic.html#GetImageEntropy">GetImageEntropy</a> • <a href="statistic.html#GetImageExtrema">GetImageExtrema</a> • <a href="statistic.html#GetImageKurtosis">GetImageKurtosis</a> • <a href="statistic.html#GetImageMean">GetImageMean</a> • <a href="statistic.html#GetImageMoments">GetImageMoments</a> • <a href="statistic.html#GetImagePerceptualHash">GetImagePerceptualHash</a> • <a href="statistic.html#GetImageRange">GetImageRange</a> • <a href="statistic.html#GetImageStatistics">GetImageStatistics</a> • <a href="statistic.html#PolynomialImage">PolynomialImage</a> • <a href="statistic.html#StatisticImage">StatisticImage</a></p> 91 92<h2><a href="../../api/MagickCore/statistic_8c.html" id="EvaluateImage">EvaluateImage</a></h2> 93 94<p>EvaluateImage() applies a value to the image with an arithmetic, relational, or logical operator to an image. Use these operations to lighten or darken an image, to increase or decrease contrast in an image, or to produce the "negative" of an image.</p> 95 96<p>The format of the EvaluateImage method is:</p> 97 98<pre class="text"> 99MagickBooleanType EvaluateImage(Image *image, 100 const MagickEvaluateOperator op,const double value, 101 ExceptionInfo *exception) 102MagickBooleanType EvaluateImages(Image *images, 103 const MagickEvaluateOperator op,const double value, 104 ExceptionInfo *exception) 105</pre> 106 107<p>A description of each parameter follows:</p> 108 109<dd> 110</dd> 111 112<dd> </dd> 113<dl class="dl-horizontal"> 114<dt>image</dt> 115<dd>the image. </dd> 116 117<dd> </dd> 118<dt>op</dt> 119<dd>A channel op. </dd> 120 121<dd> </dd> 122<dt>value</dt> 123<dd>A value value. </dd> 124 125<dd> </dd> 126<dt>exception</dt> 127<dd>return any errors or warnings in this structure. </dd> 128 129<dd> </dd> 130</dl> 131<h2><a href="../../api/MagickCore/statistic_8c.html" id="FunctionImage">FunctionImage</a></h2> 132 133<p>FunctionImage() applies a value to the image with an arithmetic, relational, or logical operator to an image. Use these operations to lighten or darken an image, to increase or decrease contrast in an image, or to produce the "negative" of an image.</p> 134 135<p>The format of the FunctionImage method is:</p> 136 137<pre class="text"> 138MagickBooleanType FunctionImage(Image *image, 139 const MagickFunction function,const ssize_t number_parameters, 140 const double *parameters,ExceptionInfo *exception) 141</pre> 142 143<p>A description of each parameter follows:</p> 144 145<dd> 146</dd> 147 148<dd> </dd> 149<dl class="dl-horizontal"> 150<dt>image</dt> 151<dd>the image. </dd> 152 153<dd> </dd> 154<dt>function</dt> 155<dd>A channel function. </dd> 156 157<dd> </dd> 158<dt>parameters</dt> 159<dd>one or more parameters. </dd> 160 161<dd> </dd> 162<dt>exception</dt> 163<dd>return any errors or warnings in this structure. </dd> 164 165<dd> </dd> 166</dl> 167<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageEntropy">GetImageEntropy</a></h2> 168 169<p>GetImageEntropy() returns the entropy of one or more image channels.</p> 170 171<p>The format of the GetImageEntropy method is:</p> 172 173<pre class="text"> 174MagickBooleanType GetImageEntropy(const Image *image,double *entropy, 175 ExceptionInfo *exception) 176</pre> 177 178<p>A description of each parameter follows:</p> 179 180<dd> 181</dd> 182 183<dd> </dd> 184<dl class="dl-horizontal"> 185<dt>image</dt> 186<dd>the image. </dd> 187 188<dd> </dd> 189<dt>entropy</dt> 190<dd>the average entropy of the selected channels. </dd> 191 192<dd> </dd> 193<dt>exception</dt> 194<dd>return any errors or warnings in this structure. </dd> 195 196<dd> </dd> 197</dl> 198<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageExtrema">GetImageExtrema</a></h2> 199 200<p>GetImageExtrema() returns the extrema of one or more image channels.</p> 201 202<p>The format of the GetImageExtrema method is:</p> 203 204<pre class="text"> 205MagickBooleanType GetImageExtrema(const Image *image,size_t *minima, 206 size_t *maxima,ExceptionInfo *exception) 207</pre> 208 209<p>A description of each parameter follows:</p> 210 211<dd> 212</dd> 213 214<dd> </dd> 215<dl class="dl-horizontal"> 216<dt>image</dt> 217<dd>the image. </dd> 218 219<dd> </dd> 220<dt>minima</dt> 221<dd>the minimum value in the channel. </dd> 222 223<dd> </dd> 224<dt>maxima</dt> 225<dd>the maximum value in the channel. </dd> 226 227<dd> </dd> 228<dt>exception</dt> 229<dd>return any errors or warnings in this structure. </dd> 230 231<dd> </dd> 232</dl> 233<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageKurtosis">GetImageKurtosis</a></h2> 234 235<p>GetImageKurtosis() returns the kurtosis and skewness of one or more image channels.</p> 236 237<p>The format of the GetImageKurtosis method is:</p> 238 239<pre class="text"> 240MagickBooleanType GetImageKurtosis(const Image *image,double *kurtosis, 241 double *skewness,ExceptionInfo *exception) 242</pre> 243 244<p>A description of each parameter follows:</p> 245 246<dd> 247</dd> 248 249<dd> </dd> 250<dl class="dl-horizontal"> 251<dt>image</dt> 252<dd>the image. </dd> 253 254<dd> </dd> 255<dt>kurtosis</dt> 256<dd>the kurtosis of the channel. </dd> 257 258<dd> </dd> 259<dt>skewness</dt> 260<dd>the skewness of the channel. </dd> 261 262<dd> </dd> 263<dt>exception</dt> 264<dd>return any errors or warnings in this structure. </dd> 265 266<dd> </dd> 267</dl> 268<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageMean">GetImageMean</a></h2> 269 270<p>GetImageMean() returns the mean and standard deviation of one or more image channels.</p> 271 272<p>The format of the GetImageMean method is:</p> 273 274<pre class="text"> 275MagickBooleanType GetImageMean(const Image *image,double *mean, 276 double *standard_deviation,ExceptionInfo *exception) 277</pre> 278 279<p>A description of each parameter follows:</p> 280 281<dd> 282</dd> 283 284<dd> </dd> 285<dl class="dl-horizontal"> 286<dt>image</dt> 287<dd>the image. </dd> 288 289<dd> </dd> 290<dt>mean</dt> 291<dd>the average value in the channel. </dd> 292 293<dd> </dd> 294<dt>standard_deviation</dt> 295<dd>the standard deviation of the channel. </dd> 296 297<dd> </dd> 298<dt>exception</dt> 299<dd>return any errors or warnings in this structure. </dd> 300 301<dd> </dd> 302</dl> 303<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageMoments">GetImageMoments</a></h2> 304 305<p>GetImageMoments() returns the normalized moments of one or more image channels.</p> 306 307<p>The format of the GetImageMoments method is:</p> 308 309<pre class="text"> 310ChannelMoments *GetImageMoments(const Image *image, 311 ExceptionInfo *exception) 312</pre> 313 314<p>A description of each parameter follows:</p> 315 316<dd> 317</dd> 318 319<dd> </dd> 320<dl class="dl-horizontal"> 321<dt>image</dt> 322<dd>the image. </dd> 323 324<dd> </dd> 325<dt>exception</dt> 326<dd>return any errors or warnings in this structure. </dd> 327 328<dd> </dd> 329</dl> 330<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImagePerceptualHash">GetImagePerceptualHash</a></h2> 331 332<p>GetImagePerceptualHash() returns the perceptual hash of one or more image channels.</p> 333 334<p>The format of the GetImagePerceptualHash method is:</p> 335 336<pre class="text"> 337ChannelPerceptualHash *GetImagePerceptualHash(const Image *image, 338 ExceptionInfo *exception) 339</pre> 340 341<p>A description of each parameter follows:</p> 342 343<dd> 344</dd> 345 346<dd> </dd> 347<dl class="dl-horizontal"> 348<dt>image</dt> 349<dd>the image. </dd> 350 351<dd> </dd> 352<dt>exception</dt> 353<dd>return any errors or warnings in this structure. </dd> 354 355<dd> </dd> 356</dl> 357<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageRange">GetImageRange</a></h2> 358 359<p>GetImageRange() returns the range of one or more image channels.</p> 360 361<p>The format of the GetImageRange method is:</p> 362 363<pre class="text"> 364MagickBooleanType GetImageRange(const Image *image,double *minima, 365 double *maxima,ExceptionInfo *exception) 366</pre> 367 368<p>A description of each parameter follows:</p> 369 370<dd> 371</dd> 372 373<dd> </dd> 374<dl class="dl-horizontal"> 375<dt>image</dt> 376<dd>the image. </dd> 377 378<dd> </dd> 379<dt>minima</dt> 380<dd>the minimum value in the channel. </dd> 381 382<dd> </dd> 383<dt>maxima</dt> 384<dd>the maximum value in the channel. </dd> 385 386<dd> </dd> 387<dt>exception</dt> 388<dd>return any errors or warnings in this structure. </dd> 389 390<dd> </dd> 391</dl> 392<h2><a href="../../api/MagickCore/statistic_8c.html" id="GetImageStatistics">GetImageStatistics</a></h2> 393 394<p>GetImageStatistics() returns statistics for each channel in the image. The statistics include the channel depth, its minima, maxima, mean, standard deviation, kurtosis and skewness. You can access the red channel mean, for example, like this:</p> 395 396<pre class="text"> 397channel_statistics=GetImageStatistics(image,exception); 398red_mean=channel_statistics[RedPixelChannel].mean; 399</pre> 400 401<p>Use MagickRelinquishMemory() to free the statistics buffer.</p> 402 403<p>The format of the GetImageStatistics method is:</p> 404 405<pre class="text"> 406ChannelStatistics *GetImageStatistics(const Image *image, 407 ExceptionInfo *exception) 408</pre> 409 410<p>A description of each parameter follows:</p> 411 412<dd> 413</dd> 414 415<dd> </dd> 416<dl class="dl-horizontal"> 417<dt>image</dt> 418<dd>the image. </dd> 419 420<dd> </dd> 421<dt>exception</dt> 422<dd>return any errors or warnings in this structure. </dd> 423 424<dd> </dd> 425</dl> 426<h2><a href="../../api/MagickCore/statistic_8c.html" id="PolynomialImage">PolynomialImage</a></h2> 427 428<p>PolynomialImage() returns a new image where each pixel is the sum of the pixels in the image sequence after applying its corresponding terms (coefficient and degree pairs).</p> 429 430<p>The format of the PolynomialImage method is:</p> 431 432<pre class="text"> 433Image *PolynomialImage(const Image *images,const size_t number_terms, 434 const double *terms,ExceptionInfo *exception) 435</pre> 436 437<p>A description of each parameter follows:</p> 438 439<dd> 440</dd> 441 442<dd> </dd> 443<dl class="dl-horizontal"> 444<dt>images</dt> 445<dd>the image sequence. </dd> 446 447<dd> </dd> 448<dt>number_terms</dt> 449<dd>the number of terms in the list. The actual list length is 2 x number_terms + 1 (the constant). </dd> 450 451<dd> </dd> 452<dt>terms</dt> 453<dd>the list of polynomial coefficients and degree pairs and a constant. </dd> 454 455<dd> </dd> 456<dt>exception</dt> 457<dd>return any errors or warnings in this structure. </dd> 458 459<dd> </dd> 460</dl> 461<h2><a href="../../api/MagickCore/statistic_8c.html" id="StatisticImage">StatisticImage</a></h2> 462 463<p>StatisticImage() makes each pixel the min / max / median / mode / etc. of the neighborhood of the specified width and height.</p> 464 465<p>The format of the StatisticImage method is:</p> 466 467<pre class="text"> 468Image *StatisticImage(const Image *image,const StatisticType type, 469 const size_t width,const size_t height,ExceptionInfo *exception) 470</pre> 471 472<p>A description of each parameter follows:</p> 473 474<dd> 475</dd> 476 477<dd> </dd> 478<dl class="dl-horizontal"> 479<dt>image</dt> 480<dd>the image. </dd> 481 482<dd> </dd> 483<dt>type</dt> 484<dd>the statistic type (median, mode, etc.). </dd> 485 486<dd> </dd> 487<dt>width</dt> 488<dd>the width of the pixel neighborhood. </dd> 489 490<dd> </dd> 491<dt>height</dt> 492<dd>the height of the pixel neighborhood. </dd> 493 494<dd> </dd> 495<dt>exception</dt> 496<dd>return any errors or warnings in this structure. </dd> 497 498<dd> </dd> 499</dl> 500</div> 501 </div> 502 </main><!-- /.container --> 503 <footer class="magick-footer"> 504 <p><a href="../../www/security-policy.html">Security</a> • 505 <a href="../../www/architecture.html">Architecture</a> 506 507 <a href="statistic.html#"><img class="d-inline" id="wand" alt="And Now a Touch of Magick" width="16" height="16" src="../../images/wand.ico"/></a> 508 509 <a href="../../www/links.html">Related</a> • 510 <a href="../../www/sitemap.html">Sitemap</a> 511 <br/> 512 <a href="../../www/support.html">Donate</a> • 513 <a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> • 514 <a href="../../www/contact.html">Contact Us</a> 515 <br/> 516 <small>© 1999-2020 ImageMagick Studio LLC</small></p> 517 </footer> 518 519 <!-- Javascript assets --> 520 <script src="../assets/magick.js" crossorigin="anonymous"></script> 521 <script>window.jQuery || document.write('<script src="https://localhost/ajax/libs/jquery/3.4.1/jquery.min.js"><\/script>')</script> 522</body> 523</html> 524<!-- Magick Cache 31st December 2019 16:54 -->
