1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950
|
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
<title>ImageMagick - Format and Print Image Properties</title>
<meta name="application-name" content="ImageMagick" />
<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." />
<meta name="application-url" content="https://legacy.imagemagick.org" />
<meta name="generator" content="PHP" />
<meta name="keywords" content="format, print, image, properties, image converter, image resizer, image editor, photo editor, jpg converter, png converter, tiff converter, vector images, online, free, swiss army" />
<meta name="rating" content="GENERAL" />
<meta name="robots" content="INDEX, FOLLOW" />
<meta name="generator" content="ImageMagick Studio LLC" />
<meta name="author" content="ImageMagick Studio LLC" />
<meta name="revisit-after" content="2 DAYS" />
<meta name="resource-type" content="document" />
<meta name="copyright" content="Copyright (c) 1999-2020 ImageMagick Studio LLC" />
<meta name="distribution" content="Global" />
<meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1" />
<meta property='og:url' content='https://legacy.imagemagick.org/' />
<meta property='og:title' content='ImageMagick Legacy' />
<meta property='og:image' content='https://legacy.imagemagick.org/images/logo.png' />
<meta property='og:type' content='website' />
<meta property='og:site_name' content='ImageMagick Legacy' />
<meta property='og:description' content="Create, Edit, Compose, or Convert Bitmap Images" />
<meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
<meta name="msvalidate.01" content="103012B23499FEB70AEA89C83C274AC7" />
<link href="escape.html" rel="canonical" />
<link href="../images/wand.png" rel="icon" />
<link href="../images/wand.ico" rel="shortcut icon" />
<link href="assets/magick.css" rel="stylesheet" />
</head>
<body>
<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
<a class="navbar-brand" href="../index.html"><img class="d-block" id="wand" alt="ImageMagick" width="32" height="32" src="../images/wand.ico"/></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsMagick" aria-controls="navbarsMagick" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="navbar-collapse collapse" id="navbarsMagick" style="">
<ul class="navbar-nav mr-auto">
<li class="nav-item ">
<a class="nav-link" href="../index.html">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item ">
<a class="nav-link" href="download.html">Download</a>
</li>
<li class="nav-item ">
<a class="nav-link" href="command-line-tools.html">Tools</a>
</li>
<li class="nav-item ">
<a class="nav-link" href="command-line-processing.html">Command-line</a>
</li>
<li class="nav-item ">
<a class="nav-link" href="develop.html">Develop</a>
</li>
<li class="nav-item">
<a class="nav-link" target="_blank" href="https://github.com/ImageMagick/ImageMagick6/discussions">Community</a>
</li>
<li class="nav-item">
<iframe src="https://github.com/sponsors/ImageMagick/button" title="Sponsor ImageMagick" height="35" width="107" style="border: 0;"></iframe>
</li>
</ul>
</div>
<form class="form-inline my-2 my-md-0" action="https://imagemagick.org/script/search.php">
<input class="form-control mr-sm-2" type="text" name="q" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit" name="sa">Search</button>
</form>
</nav>
<div role="main" class="container">
<script async="async" src="https://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-3129977114552745"
data-ad-slot="6345125851"
data-full-width-responsive="true"
data-ad-format="horizontal"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
</div>
<main class="container">
<div class="magick-template">
<div class="magick-header">
<p class="lead magick-description">There are copious amounts of extra data associated with images (metadata), beyond the actual image pixels. This metadata can be useful, either for display, or for various calculations, or in modifying the behavior of later image processing operations. You can utilize percent escapes in a number of options, for example in <a href="command-line-options.html#format_identify_">-format</a> or in montage <a href="command-line-options.html#label" >-label</a>, to print various properties and other settings associated with an image.</p>
<div class="table-responsive" style="font-size:87.5% !important;">
<table class="table table-hover">
<tr>
<td><b>Profile Data</b></td>
<td>Such as EXIF: data, containing focal lengths, exposures, dates, and in
come cases GPS locations.
</td></tr>
<tr>
<td><b>Attributes</b></td>
<td>These are directly involved with image data, and more commonly
modified as part of normal image processing. These include
width, height, depth, image type (colorspace), timing delays, and
background color. Most specific percent escapes is to access this
information.
</td></tr>
<tr>
<td><b>Properties</b></td>
<td>These are stored as a table of free form strings, and are (if possible)
saved with the image (especially in MIFF and PNG image file formats).
These include: Labels, Captions, Comments.
</td></tr>
<tr>
<td><b>Artifacts</b></td>
<td>These are various operational (expert) settings that are saved for
use by various operators, or by the user for future use. It is just
a table of free-form strings. They are not saved with the image when
written. See Artifacts and Options below for details.
</td></tr>
<tr>
<td><b>Options</b></td>
<td>Also operational (expert) settings that are saved for
use by various operators, but are set globally for use by a whole
image list (also not saved). See Artifacts and Options below.
</td></tr>
</table></div>
<h3>Percent Escape Handling</h3>
<p>If you request a percent escape such as <code>%[key]</code> the setting
is looked for in the following order until the first match has been
found...</p>
<ol>
<li>Handle special prefixes such as 'artifact:' 'option:' 'exif:', or
'fx:'. This includes and calculations and or globs of those prefixes such
as 'exif:*' or 'artifact:*' (see below).</li>
<li>If <code>key</code> contains a glob pattern (but no known prefix)
search free-form properties table.</li>
<li>If <code>key</code> is a special image 'attribute' name (see list
above) return the associated or calculated image attribute.</li>
<li>Search for setting as a free-form 'property'</li>
<li>Search for setting as a free-form 'artifact'</li>
<li>Search for setting as a free-form 'option'</li>
<li>Replace escape with empty string, and perhaps produce a warning.</li>
</ol>
<p>Remember, all long name forms of percent escapes are handled in a is case
insensitive manner. </p>
<p><b>As of IM v6.8.0-5</b> you can now access the Artifact and Option
free-form string tables directly, allowing you to override the above sequence,
and avoid accessing an attribute or property of the same name.</p>
<pre class="highlight"><code>%[artifact:<var>setting</var>]
%[option:<var>setting</var>]
</code></pre>
<p>Escape handling requires access to an image container. If none are available, a blank image is created to ensure the expression can be processed and a value returned. For example, <code>convert -print "%[fx:.8765/3.14]" null: null:</code>.</p>
<h3>Single Letter Attribute Percent Escapes</h3>
<p>Here are common single letter escapes (short form) is used to report the most
common attributes and properties of an image, such as: the image filename
filename, type, width, height. </p>
<div class="table-responsive" style="font-size:87.5% !important;">
<table class="table table-sm table-hover">
<tr>
<td>\</td>
<td>backslash, the next character is literal and not subject to interpretation</td>
</tr>
<tr>
<td>\n</td>
<td>newline</td>
</tr>
<tr>
<td>\r</td>
<td>carriage return</td>
</tr>
<tr>
<td><</td>
<td>less-than character.</td>
</tr>
<tr>
<td>></td>
<td>greater-than character.</td>
</tr>
<tr>
<td>&</td>
<td>ampersand character.</td>
</tr>
<tr>
<td>%%</td>
<td>a percent sign</td>
</tr>
<tr>
<td>%b</td>
<td>file size of image read in (use <a href="escape.html#precision">-precision</a> 16 to force results in B)</td>
</tr>
<tr>
<td>%c</td>
<td>comment meta-data property</td>
</tr>
<tr>
<td>%d</td>
<td>directory component of path</td>
</tr>
<tr>
<td>%e</td>
<td>filename extension or suffix</td>
</tr>
<tr>
<td>%f</td>
<td>filename (including suffix)</td>
</tr>
<tr>
<td>%g</td>
<td>layer canvas page geometry (equivalent to "%Wx%H%X%Y")</td>
</tr>
<tr>
<td>%h</td>
<td>current image height in pixels</td>
</tr>
<tr>
<td>%i</td>
<td>image filename (note: becomes output filename for "info:")</td>
</tr>
<tr>
<td>%k</td>
<td>CALCULATED: number of unique colors</td>
</tr>
<tr>
<td>%l</td>
<td>label meta-data property</td>
</tr>
<tr>
<td>%m</td>
<td>image file format (file magic)</td>
</tr>
<tr>
<td>%n</td>
<td>number of images in current image sequence, reported once per frame</td>
</tr>
<tr>
<td>%o</td>
<td>output filename (used for delegates)</td>
</tr>
<tr>
<td>%p</td>
<td>index of image in current image list</td>
</tr>
<tr>
<td>%q</td>
<td>quantum depth (compile-time constant)</td>
</tr>
<tr>
<td>%r</td>
<td>image class and colorspace</td>
</tr>
<tr>
<td>%s</td>
<td>scene number (from input unless re-assigned)</td>
</tr>
<tr>
<td>%t</td>
<td>filename without directory or extension (suffix)</td>
</tr>
<tr>
<td>%u</td>
<td>unique temporary filename (used for delegates)</td>
</tr>
<tr>
<td>%w</td>
<td>current width in pixels</td>
</tr>
<tr>
<td>%x</td>
<td>x resolution (density)</td>
</tr>
<tr>
<td>%y</td>
<td>y resolution (density)</td>
</tr>
<tr>
<td>%z</td>
<td>image depth (as read in unless modified, image save depth)</td>
</tr>
<tr>
<td>%A</td>
<td>image transparency channel enabled (true/false)</td>
</tr>
<tr>
<td>%B</td>
<td>file size of image read in bytes</td>
</tr>
<tr>
<td>%C</td>
<td>image compression type</td>
</tr>
<tr>
<td>%D</td>
<td>image GIF dispose method</td>
</tr>
<tr>
<td>%G</td>
<td>original image size (%wx%h; before any resizes)</td>
</tr>
<tr>
<td>%H</td>
<td>page (canvas) height</td>
</tr>
<tr>
<td>%M</td>
<td>Magick filename (original file exactly as given, including read mods)</td>
</tr>
<tr>
<td>%N</td>
<td>number of images in current image sequence, reported once per image sequence</td>
<tr>
<td>%O</td>
<td>page (canvas) offset ( = %X%Y )</td>
</tr>
<tr>
<td>%P</td>
<td>page (canvas) size ( = %Wx%H )</td>
</tr>
<tr>
<td>%Q</td>
<td>image compression quality ( 0 = default )</td>
</tr>
<tr>
<td>%S</td>
<td>?? scenes ??</td>
</tr>
<tr>
<td>%T</td>
<td>image time delay (in centi-seconds)</td>
</tr>
<tr>
<td>%U</td>
<td>image resolution units</td>
</tr>
<tr>
<td>%W</td>
<td>page (canvas) width</td>
</tr>
<tr>
<td>%X</td>
<td>page (canvas) x offset (including sign)</td>
</tr>
<tr>
<td>%Y</td>
<td>page (canvas) y offset (including sign)</td>
</tr>
<tr>
<td>%Z</td>
<td>unique filename (used for delegates)</td>
</tr>
<tr>
<td>%@</td>
<td>CALCULATED: trim bounding box (without actually trimming)</td>
</tr>
<tr>
<td>%#</td>
<td>CALCULATED: 'signature' hash of image values</td>
</tr>
</table></div>
<p>Here is a sample command and its output for an image with filename
<code>bird.miff</code> and whose width is 512 and height is 480.</p>
<pre class="highlight"><code>-> identify -format "%m:%f %wx%h" bird.miff
MIFF:bird.miff 512x480
</code></pre>
<p>Note that all single letter percent escapes can also be used using long
form (from IM version 6.7.6-9, see next). For example <code>%[f]</code> is
equivalent to the <code>%f</code> short form. </p>
<p><b>WARNING</b>: short form percent escapes are NOT performed when the percent
is after a number. For example, <code>10%x10</code> does not expand the
<code>%x</code> as a percent escape. If you specifically want to expand the
'x', use the long form which overrides this special case. EG:
<code>10%[x]10</code>. </p>
<p>Also be warned that calculated attributes can take some time to generate,
especially for large images.</p>
<h3>Long Form Attribute Percent Escapes</h3>
<p>In addition to the above specific and calculated attributes are recognized
when enclosed in braces (long form):</p>
<div class="table-responsive" style="font-size:87.5% !important;">
<table class="table table-sm table-hover">
<tr>
<td>%[basename]</td>
<td>base filename, no suffixes (as %t)</td>
</tr>
<tr>
<td>%[bit-depth]</td>
<td>Actual bit-depth of the pixel data</td>
</tr>
<tr>
<td>%[bounding-box]</td>
<td>upper left and lower right corners of the image bounding box</td>
</tr>
<tr>
<td>%[caption]</td>
<td>caption meta-data property</td>
</tr>
<tr>
<td>%[caption:pointsize]</td>
<td>returns the pointsize computed during caption: processing (as of IM 6.9.1-0)</td>
</tr>
<tr>
<td>%[channels]</td>
<td>??? channels in use - colorspace ???</td>
</tr>
<tr>
<td>%[colorspace]</td>
<td>colorspace of Image Data (excluding transparency)</td>
</tr>
<tr>
<td>%[compose]</td>
<td> </td>
</tr>
<tr>
<td>%[compression]</td>
<td>image compression type (as of IM 6.9.6-6)</td>
</tr>
<tr>
<td>%[copyright]</td>
<td>ImageMagick Copyright String</td>
</tr>
<tr>
<td>%[depth]</td>
<td>depth of image for write (as input unless changed)</td>
</tr>
<tr>
<td>%[deskew:angle]</td>
<td>The deskew angle in degrees of rotation</td>
</tr>
<tr>
<td>%[directory]</td>
<td>directory part of filename (as %d)</td>
</tr>
<tr>
<td>%[distortion]</td>
<td>how well an image resembles a reference image (<a href="command-line-options.html#compare" >-compare</a>)</td>
</tr>
<tr>
<td>%[entropy]</td>
<td>CALCULATED: entropy of the image</td>
</tr>
<tr>
<td>%[extension]</td>
<td>extension part of filename (as %e)</td>
</tr>
<tr>
<td>%[gamma]</td>
<td>value of image gamma</td>
</tr>
<tr>
<td>%[group]</td>
<td>??? window group ???</td>
</tr>
<tr>
<td>%[height]</td>
<td>original height of image (when it was read in)</td>
</tr>
<tr>
<td>%[input]</td>
<td> </td>
</tr>
<tr>
<td>%[interlace]</td>
<td>Image interlace mode (as of IM 6.9.6-6)</td>
</tr>
<tr>
<td>%[kurtosis]</td>
<td>CALCULATED: kurtosis statistic of image</td>
</tr>
<tr>
<td>%[label]</td>
<td>label meta-data property</td>
</tr>
<tr>
<td>%[label:pointsize]</td>
<td>returns the pointsize computed during label: processing (as of IM 6.9.1-0)</td>
</tr>
<tr>
<td>%[magick]</td>
<td>coder used to read image (not the file suffix)</td>
</tr>
<tr>
<td>%[max]</td>
<td>CALCULATED: maximum value statistic of image</td>
</tr>
<tr>
<td>%[mean]</td>
<td>CALCULATED: average value statistic of image</td>
</tr>
<tr>
<td>%[min]</td>
<td>CALCULATED: minimum value statistic of image</td>
</tr>
<tr>
<td>%[opaque]</td>
<td>CALCULATED: is image fully-opaque?</td>
</tr>
<tr>
<td>%[orientation]</td>
<td>image orientation</td>
</tr>
<tr>
<td>%[page]</td>
<td>Virtual canvas (page) geometry</td>
</tr>
<tr>
<td>%[papersize:<em>name</em>]</td>
<td>paper size for <em>name</em> in pixels at 72DPI (e.g. papersize:A4)</td>
</tr>
<tr>
<td>%[printsize.x]</td>
<td>X printsize</td>
</tr>
<tr>
<td>%[printsize.y]</td>
<td>Y printsize</td>
</tr>
<tr>
<td>%[profile:icc]</td>
<td>ICC profile info</td>
</tr>
<tr>
<td>%[profile:icm]</td>
<td>ICM profile info</td>
</tr>
<tr>
<td>%[profiles]</td>
<td>list of any embedded profiles</td>
</tr>
<tr>
<td>%[quality]</td>
<td>Image quality value (as of IM 6.9.6-6)</td>
</tr>
<tr>
<td>%[rendering-intent]</td>
<td>Image rendering intent (as of IM 6.9.6-6)</td>
</tr>
<tr>
<td>%[resolution.x]</td>
<td>X density (resolution) without units</td>
</tr>
<tr>
<td>%[resolution.y]</td>
<td>Y density (resolution) without units</td>
</tr>
<tr>
<td>%[scene]</td>
<td>original scene number of image in input file</td>
</tr>
<tr>
<td>%[size]</td>
<td>original size of image (when it was read in)</td>
</tr>
<tr>
<td>%[skewness]</td>
<td>CALCULATED: skewness statistic of image</td>
</tr>
<tr>
<td>%[standard-deviation]</td>
<td>CALCULATED: standard deviation statistic of image</td>
</tr>
<tr>
<td>%[type]</td>
<td>CALCULATED: image type</td>
</tr>
<tr>
<td>%[unique]</td>
<td>unique temporary filename ???</td>
</tr>
<tr>
<td>%[units]</td>
<td>image resolution units</td>
</tr>
<tr>
<td>%[version]</td>
<td>Version Information of this running ImageMagick</td>
</tr>
<tr>
<td>%[width]</td>
<td>original width of image (when it was read in)</td>
</tr>
<tr>
<td>%[zero]</td>
<td>zero (unique filename for delegate use)</td>
</tr>
</table></div>
<h3>Properties</h3>
<p>All other long forms of percent escapes (not single letter long form) are
handled in a case insensitive manner. Such escapes will attempt to look
up that name specific data sources. </p>
<p>The primary search space (if not a specific attribute listed above) is
a free-form property string. Such strings are associated and saved with
images, and are typically set using either the <a href="command-line-options.html#set" >-set</a>
CLI option (or API equivalent), or from special convenience options
(such as <a href="command-line-options.html#label"
>-label</a>, <a href="command-line-options.html#comment"
>-comment</a>, <a href="command-line-options.html#caption"
>-caption</a>). </p>
<p>These convenience options are globally saved (as 'global options' so thay can
be set before images are read), and later are transferred to the property of
individual images, only when they are read in. At that time any internal
percent escape present is then handled. </p>
<p>To change a property of an image already in memory, you need to use <a
href="command-line-options.html#set" >-set</a>.
</p>
<p>Note that properties, like attributes (and profiles), are saved with
images when write, if the image file format allows. </p>
<h3>Artifacts and Options</h3>
<p>The previous percent escapes are associated with the primary Attributes and
Properties. Which is the original and primary focus of such percent escapes.
</p>
<p>However there are many operational settings that are used by various
ImageMagick operators that can be useful to set and later access. These
consist of per-image Artifacts, and Global options (associated with a list of
images, typically the current image list).</p>
<p>Note that the major difference between an artifact and a property is that
artifacts, being an internal operational setting, is not saved with images (if
such is possible). </p>
<p>For example when you use <code>-define 'distort:viewport=100x100'</code> you
are in fact generating a global option, which the <a href="command-line-options.html#distort"
>-distort</a> operator will use to modify its behavior (distorted output
image 'view'). </p>
<p>An Option is essentially an Artifact that has been stored globally as part
of a list of images (specifically a 'Wand' of images). As such they are
identical, in that a Option, is simply a global Artifact for all the
associated images. </p>
<p>As such you can use <code>-set 'option:distort:viewport' '100x100'</code> to
achieve the same result of setting a Artifact for the disort operation to use.
</p>
<p><b>Internal Handling of a Global Option...</b></p>
<p>The Core library ('MagickCore') does not generally directly understand
Global Options. As such, continuing the previous example, the
<code>DistortImages()</code> function only looks up an artifact to discover if
a 'viewport' has been provided to it. </p>
<p>How Global Options are used when a library function requests an Artifact is
one of the key differences between IMv6 and IMv7.</p>
<p>Before each operator, any global Options
are copied to per-image Artifacts, for every image in the current image list.
This allows various operators to find its operational 'defines' or Artifacts.
</p>
<p>Note that many API's that do not use Wands (PerlMagick for example using
arrays of images rather than a Wand). In these API's you will not have Global
Options, only per-image Artifacts. </p>
<p>In summery a Global Option, if available, is equivalent to a per-image
Artifact. </p>
<h3>Glob-Pattern Listing of Properties, Artifacts and Options</h3>
<p>The <var>setting</var> can contain a glob pattern. As such you can
now list all free-form string properties, artifacts, and options, (but not
specific image attributes) using...</p>
<pre class="highlight"><code>convert ... \
-print "__Properties__\n%[*]" \
-print "__Artifacts__\n%[artifact:*]" \
-print "__Options__\n%[option:*]" \
...
</code></pre>
<p> The format of glob patterns are very specific and as such is generally
only used to list specific settings, such as when debugging, rather than being
used for image processing use. </p>
<h3>Calculated Percent Escape Prefixes</h3>
<p>There are some special prefixes (before the first ':') which performs
calculations based on the user provided string that follows that prefix. For
example you can do a numerical calculation use <code>%[fx:...]</code> to
evaluate the given <a href="fx.html">FX</a> expressions:</p>
<pre class="highlight"><code>%[fx:<var>expression</var>]
</code></pre>
<p>Use <code>pixel:</code> or <code>hex:</code> to evaluate a pixel color as defined by the <a
href="fx.html">FX</a>
expression:</p>
<pre class="highlight"><code>%[pixel:<var>expression</var>]
</code></pre>
<p>Use <a href="command-line-options.html#define">-define</a> to specify the color compliance (e.g. <code>-define pixel:compliance=css</code>)</p>.
<h3>Specific Profile Percent Escape Prefixes</h3>
<p>You can also use the following special formatting syntax to print EXIF
mage meta-data that was included in the image read in:</p>
<pre class="highlight"><code>%[EXIF:<var>tag</var>]
</code></pre>
<p>Choose <var>tag</var> from the following:</p>
<pre class="pre-scrollable"><code>
* (print all EXIF tags, in keyword=data format)
! (print all EXIF tags, in tag_number data format)
#hhhh (print data for EXIF tag #hhhh)
ImageWidth
ImageLength
BitsPerSample
Compression
PhotometricInterpretation
FillOrder
DocumentName
ImageDescription
Make
Model
StripOffsets
Orientation
SamplesPerPixel
RowsPerStrip
StripByteCounts
XResolution
YResolution
PlanarConfiguration
ResolutionUnit
TransferFunction
Software
DateTime
Artist
WhitePoint
PrimaryChromaticities
TransferRange
JPEGProc
JPEGInterchangeFormat
JPEGInterchangeFormatLength
YCbCrCoefficients
YCbCrSubSampling
YCbCrPositioning
ReferenceBlackWhite
CFARepeatPatternDim
CFAPattern
BatteryLevel
Copyright
ExposureTime
FNumber
IPTC/NAA
EXIFOffset
InterColorProfile
ExposureProgram
SpectralSensitivity
GPSInfo
ISOSpeedRatings
OECF
EXIFVersion
DateTimeOriginal
DateTimeDigitized
ComponentsConfiguration
CompressedBitsPerPixel
ShutterSpeedValue
ApertureValue
BrightnessValue
ExposureBiasValue
MaxApertureValue
SubjectDistance
MeteringMode
LightSource
Flash
FocalLength
MakerNote
UserComment
SubSecTime
SubSecTimeOriginal
SubSecTimeDigitized
FlashPixVersion
ColorSpace
EXIFImageWidth
EXIFImageLength
InteroperabilityOffset
FlashEnergy
SpatialFrequencyResponse
FocalPlaneXResolution
FocalPlaneYResolution
FocalPlaneResolutionUnit
SubjectLocation
ExposureIndex
SensingMethod
FileSource
SceneType
</code></pre>
<br/>
<p>Surround the format specification with quotation marks to prevent your
shell from misinterpreting any spaces and square brackets.</p>
<p>The following special formatting syntax can be used to print IPTC
information contained in the file:</p>
<pre class="highlight"><code>%[IPTC:<var>dataset</var>:<var>record</var>]
</code></pre>
<p>Select <var>dataset</var> and <var>record</var> from the following:</p>
<pre class="pre-scrollable:">
<code>
Envelope Record
1:00 Model Version
1:05 Destination
1:20 File Format
1:22 File Format Version
1:30 Service Identifier
1:40 Envelope Number
1:50 Product ID
1:60 Envelope Priority
1:70 Date Sent
1:80 Time Sent
1:90 Coded Character Set
1:100 UNO (Unique Name of Object)
1:120 ARM Identifier
1:122 ARM Version
Application Record
2:00 Record Version
2:03 Object Type Reference
2:05 Object Name (Title)
2:07 Edit Status
2:08 Editorial Update
2:10 Urgency
2:12 Subject Reference
2:15 Category
2:20 Supplemental Category
2:22 Fixture Identifier
2:25 Keywords
2:26 Content Location Code
2:27 Content Location Name
2:30 Release Date
2:35 Release Time
2:37 Expiration Date
2:38 Expiration Time
2:40 Special Instructions
2:42 Action Advised
2:45 Reference Service
2:47 Reference Date
2:50 Reference Number
2:55 Date Created
2:60 Time Created
2:62 Digital Creation Date
2:63 Digital Creation Time
2:65 Originating Program
2:70 Program Version
2:75 Object Cycle
2:80 By-Line (Author)
2:85 By-Line Title (Author Position) [Not used in Photoshop 7]
2:90 City
2:92 Sub-Location
2:95 Province/State
2:100 Country/Primary Location Code
2:101 Country/Primary Location Name
2:103 Original Transmission Reference
2:105 Headline
2:110 Credit
2:115 Source
2:116 Copyright Notice
2:118 Contact
2:120 Caption/Abstract
2:122 Caption Writer/Editor
2:125 Rasterized Caption
2:130 Image Type
2:131 Image Orientation
2:135 Language Identifier
2:150 Audio Type
2:151 Audio Sampling Rate
2:152 Audio Sampling Resolution
2:153 Audio Duration
2:154 Audio Outcue
2:200 ObjectData Preview File Format
2:201 ObjectData Preview File Format Version
2:202 ObjectData Preview Data
Pre-ObjectData Descriptor Record
7:10 Size Mode
7:20 Max Subfile Size
7:90 ObjectData Size Announced
7:95 Maximum ObjectData Size
ObjectData Record
8:10 Subfile
Post ObjectData Descriptor Record
9:10 Confirmed ObjectData Size
</code></pre>
</div>
</div>
</main><!-- /.container -->
<footer class="magick-footer">
<div class="container">
<p><a href="security-policy.html">Security</a> •
<a href="news.html">News</a>
<a href="escape.html#"><img class="d-inline" id="wand" alt="And Now a Touch of Magick" width="16" height="16" src="../images/wand.ico"/></a>
<a href="links.html">Related</a> •
<a href="sitemap.html">Sitemap</a>
<br/>
<a href="support.html">Sponsor</a> •
<a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> •
<a href="https://imagemagick.org/script/contact.php">Contact Us</a>
<br/>
<a href="https://github.com/imagemagick/imagemagick6" target="_blank" rel="noopener" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" class="navbar-nav-svg" viewBox="0 0 512 499.36" width="2%" height="2%" role="img" focusable="false"><title>GitHub</title><path fill="currentColor" fill-rule="evenodd" d="M256 0C114.64 0 0 114.61 0 256c0 113.09 73.34 209 175.08 242.9 12.8 2.35 17.47-5.56 17.47-12.34 0-6.08-.22-22.18-.35-43.54-71.2 15.49-86.2-34.34-86.2-34.34-11.64-29.57-28.42-37.45-28.42-37.45-23.27-15.84 1.73-15.55 1.73-15.55 25.69 1.81 39.21 26.38 39.21 26.38 22.84 39.12 59.92 27.82 74.5 21.27 2.33-16.54 8.94-27.82 16.25-34.22-56.84-6.43-116.6-28.43-116.6-126.49 0-27.95 10-50.8 26.35-68.69-2.63-6.48-11.42-32.5 2.51-67.75 0 0 21.49-6.88 70.4 26.24a242.65 242.65 0 0 1 128.18 0c48.87-33.13 70.33-26.24 70.33-26.24 14 35.25 5.18 61.27 2.55 67.75 16.41 17.9 26.31 40.75 26.31 68.69 0 98.35-59.85 120-116.88 126.32 9.19 7.9 17.38 23.53 17.38 47.41 0 34.22-.31 61.83-.31 70.23 0 6.85 4.61 14.81 17.6 12.31C438.72 464.97 512 369.08 512 256.02 512 114.62 397.37 0 256 0z"/></svg></a> •
<a href="https://twitter.com/imagemagick" target="_blank" rel="noopener" aria-label="Twitter"><svg xmlns="http://www.w3.org/2000/svg" class="navbar-nav-svg" viewBox="0 0 512 416.32" width="2%" height="2%" role="img" focusable="false"><title>Twitter</title><path fill="currentColor" d="M160.83 416.32c193.2 0 298.92-160.22 298.92-298.92 0-4.51 0-9-.2-13.52A214 214 0 0 0 512 49.38a212.93 212.93 0 0 1-60.44 16.6 105.7 105.7 0 0 0 46.3-58.19 209 209 0 0 1-66.79 25.37 105.09 105.09 0 0 0-181.73 71.91 116.12 116.12 0 0 0 2.66 24c-87.28-4.3-164.73-46.3-216.56-109.82A105.48 105.48 0 0 0 68 159.6a106.27 106.27 0 0 1-47.53-13.11v1.43a105.28 105.28 0 0 0 84.21 103.06 105.67 105.67 0 0 1-47.33 1.84 105.06 105.06 0 0 0 98.14 72.94A210.72 210.72 0 0 1 25 370.84a202.17 202.17 0 0 1-25-1.43 298.85 298.85 0 0 0 160.83 46.92"/></svg></a>
<br/>
<small>© 1999-2021 ImageMagick Studio LLC</small></p>
</div>
</footer>
<!-- Javascript assets -->
<script>window.jQuery || document.write('<script src="assets/jquery.slim.min.js"><\/script>')</script><script src="assets/bootstrap.bundle.min.js" integrity="sha384-LtrjvnR4Twt/qOuYxE721u19sVFLVSA4hf/rRt6PrZTmiPltdZcI7q7PXQBYTKyf" crossorigin="anonymous">
</body>
</html>
|