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
|
From: =?utf-8?q?Bastien_ROUCARI=C3=88S?= <roucaries.bastien@gmail.com>
Date: Wed, 14 Dec 2016 15:26:15 +0100
Subject: Fix www/command-line-options.html
Forwarded: Yes, https://github.com/ImageMagick/ImageMagick/issues/304
---
www/command-line-options.html | 720 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 719 insertions(+), 1 deletion(-)
diff --git a/www/command-line-options.html b/www/command-line-options.html
index 3944387..90c3f40 100644
--- a/www/command-line-options.html
+++ b/www/command-line-options.html
@@ -2338,7 +2338,725 @@ is case-dependent.</p>
<p>Such settings are global in scope, and affect all images and operations. </p>
-<p>See <a href="defines.html">ImageMagick Defines</a> for a list of recognized defines. For example:</p>
+<p>The following definitions are just some of the artifacts that are
+available:</p>
+
+<table class="table table-sm table-striped">
+ <tr>
+ <td>auto-threshold:verbose</td>
+ <td>return derived threshold as the <kbd>auto-threshold:threshold</kbd> image property.</td>
+ </tr>
+
+ <tr>
+ <td>bmp3:alpha=<var>true|false</var></td>
+ <td>include any alpha channel when writing in the BMP image format.</td>
+ </tr>
+
+ <tr>
+ <td>bmp:format=<var>value</var></td>
+ <td> valid values are <var>bmp2</var>, <var>bmp3</var>,
+ and <var>bmp4</var>. This option can be useful when the
+ method of prepending "BMP2:" to the output filename is inconvenient or
+ is not available, such as when using the <a href="mogrify.html">mogrify</a> utility.</td>
+ </tr>
+
+ <tr>
+ <td>bmp:subtype=<var>RGB555|RGB565|ARGB4444|ARGB1555</var></td>
+ <td>BMP channel depth subtypes. Only support in BMP (BMP4). BMP3 and BMP2 do not
+ contain header fields to support these options.</td>
+ </tr>
+
+ <tr>
+ <td>colorspace:auto-grayscale=<var>on|off</var></td>
+ <td>prevent automatic conversion to grayscale inside coders that support
+ grayscale. This should be accompanied by -type truecolor. PNG and TIF do
+ not need this define. With PNG, just use PNG24:image. With TIF, just use
+ -type truecolor. JPG and PSD will need this define.</td>
+ </tr>
+
+ <tr>
+ <td>complex:snr=<var>value</var></td>
+ <td>Set the divide SNR constant<a href="command-line-options.html#complex">-complex</a></td>
+ </tr>
+
+ <tr>
+ <td>compose:args=<var>arguments</var></td>
+ <td>Sets certain compose argument values when using convert ... -compose ...
+ -composite. See <a href="https://imagemagick.org/www/compose.html"
+ >Image Composition</a></td>
+ </tr>
+
+ <tr>
+ <td>compose:clamp=<var>on|off</var></td>
+ <td>set each pixel whose value is below zero to zero and any the pixel whose value is above the quantum range to the quantum range (e.g. 65535) otherwise the pixel value remains unchanged. Define supported in ImageMagick 6.9.1-3 and above.</td>
+ </tr>
+
+ <tr>
+ <td>compose:outside-overlay=<var>true|false</var></td>
+ <td>Some <a href="command-line-options.html#compose" >-compose</a> methods can modify the 'destination' image outside the overlay area. It is disabled by default.</td>
+ </tr>
+
+ <tr>
+ <td>connected-components:area-threshold=<var>value</var></td>
+ <td>Merges any region with area smaller than <var>value</var> into its surrounding region or largest neighbor.</td>
+ </tr>
+
+ <tr>
+ <td>connected-components:keep=<var>list-of-ids</var></td>
+ <td>Comma and/or hyphenated list of id values to keep in the output. Supported in Imagemagick 6.9.3-0.</td>
+ </tr>
+
+ <tr>
+ <td>connected-components:mean-color=<var>true</var></td>
+ <td>Changes the output image from id values to mean color values. Supported in Imagemagick 6.9.2-8.</td>
+ </tr>
+
+ <tr>
+ <td>connected-components:remove=<var>list-of-ids</var></td>
+ <td>Comma and/or hyphenated list of id values to remove from the output. Supported in Imagemagick 6.9.2-9.</td>
+ </tr>
+
+ <tr>
+ <td>connected-components:verbose=<var>true</var></td>
+ <td>Lists id, bounding box, centroid, area, mean color for each region.</td>
+ </tr>
+
+ <tr>
+ <td>convolve:scale=<var>{kernel_scale}[!^] [,{origin_addition}] [%]</var></td>
+ <td>Defines the kernel scaling. The special flag ! automatically scales to
+ full dynamic range. The ! flag can be used in combination with a factor or
+ percent. The factor or percent is then applied after the automatic scaling.
+ An example is 50%!. This produces a result 50% darker than full dynamic
+ range scaling. The ^ flag assures the kernel is 'zero-summing', for
+ example when some values are positive and some are negative as in edge
+ detection kernels. The origin addition adds that value to the center
+ pixel of the kernel. This produces an effect that is like adding the image
+ that many times to the result of the filtered image. The typical value
+ is 1 so that the original image is added to the result of the convolution.
+ The default is 0.</td>
+ </tr>
+
+ <tr>
+ <td>convolve:showKernel=<var>1</var></td>
+ <td>Outputs (to 'standard error') all the information about a specified <a
+ href="command-line-options.html#morphology" >-morphology convolve</a> kernel.</td>
+ </tr>
+
+ <tr>
+ <td>dcm:display-range=<var>reset</var></td>
+ <td>Sets the display range to the minimum and maximum pixel values for the
+ DCM image format.</td>
+ </tr>
+
+ <tr>
+ <td>dds:cluster-fit=<var>true|false</var></td>
+ <td>Enables the dds cluster-fit.</td>
+ </tr>
+
+ <tr>
+ <td>dds:compression=<var>dxt1|dxt5|none</var></td>
+ <td>Sets the dds compression.</td>
+ </tr>
+
+ <tr>
+ <td>dds:mipmaps=<var>value</var></td>
+ <td>Sets the dds number of mipmaps.</td>
+ </tr>
+
+ <tr>
+ <td>dds:weight-by-alpha=<var>true|false</var></td>
+ <td>Enables the dds alpha weighting.</td>
+ </tr>
+
+ <tr>
+ <td>deskew:auto-crop=<var>true</var></td>
+ <td>auto crop the image after deskewing.</td>
+ </tr>
+
+ <tr>
+ <td>delegate:bimodal=<var>true</var></td>
+ <td>Specifies direct conversion from Postscript to PDF.</td>
+ </tr>
+
+ <tr>
+ <td>distort:scale=<var>value</var></td>
+ <td>Sets the output scaling factor for use with <a href="command-line-options.html#distort"
+ >-distort</a></td>
+ </tr>
+
+ <tr>
+ <td>distort:viewport=<var>WxH+X+Y</var></td>
+ <td>Sets the viewport for use with <a href="command-line-options.html#distort">-distort</a></td>
+ </tr>
+
+ <tr>
+ <td>dither:diffusion-amount=<var>X%</var></td>
+ <td>Sets the amount of diffusion to use with Floyd-Steinberg diffusion</td>
+ </tr>
+
+ <tr>
+ <td>dot:layout-engine=<var>value</var></td>
+ <td>Specifies the layout engine for the DOT image format (e.g.
+ <code>neato</code>).</td>
+ </tr>
+
+ <tr>
+ <td>exr:color-type=<var>value</var></td>
+ <td>Specifies the color type for the EXR format: RGB, RGBA, YC, YCA, Y, YA, R, G, B, A).</td>
+ </tr>
+
+ <tr>
+ <td>filter:option=<var>value</var></td>
+ <td>Set a filter option for use with <a href="command-line-options.html#resize">-resize</a>.
+ See <a href="command-line-options.html#filter">-filter</a> for details.</td>
+ </tr>
+
+ <tr>
+ <td>fourier:normalize=<var>inverse</var></td>
+ <td>Sets the location for the FFT/IFT normalization as use by
+ <a href="command-line-options.html#fft">+-fft</a> and <a href="command-line-options.html#ift">+-ift</a>. The default is
+ <var>forward</var>.</td>
+ </tr>
+
+ <tr>
+ <td>h:format=<var>value</var></td>
+ <td>Set the image encoding format use when writing a C-style header.
+ <var>format</var> can be any output format supported by ImageMagick
+ except for <var>h</var> and <var>magick</var>. If this
+ option is omitted, the default is <var>GIF</var> for PseudoClass
+ images and <var>PNM</var> for DirectClass images.
+ </td>
+ </tr>
+
+ <tr>
+ <td>hough-lines:accumulator=true</td>
+ <td>Returns the accumulator image in addition to the lines image</td>
+ </tr>
+
+ <tr>
+ <td>icon:auto-resize</td>
+ <td>Automatically stores multiple sizes when writing an ico image
+ (requires a 256x256 input image).</td>
+ </tr>
+
+ <tr>
+ <td>identify:locate=<var>minimum|maximum</var></td>
+ <td>Locates the coordinates of one or more image minimum or maximum</td>
+ </tr>
+
+ <tr>
+ <td>identify:limit=<var>number</var></td>
+ <td>Locates the coordinates for the number of minima or maxima specified</td>
+ </tr>
+
+ <tr>
+ <td>jp2:layer-number=<var>value</var></td>
+ <td>Sets the maximum number of quality layers to decode. Same for JPT, JC2,
+ and J2K</td>
+ </tr>
+
+ <tr>
+ <td>jp2:number-resolutions=<var>value</var></td>
+ <td>Sets the number of resolutions to encode.Same for JPT, JC2, and J2K</td>
+ </tr>
+
+ <tr>
+ <td>jp2:progression-order=<var>value</var></td>
+ <td>choose from LRCP, RLCP, RPCL, PCRL or CPRL. Same for JPT, JC2, and
+ J2K</td>
+ </tr>
+
+ <tr>
+ <td>jp2:quality=<var>value,value...</var></td>
+ <td>Sets the quality layer PSNR, given in dB. The order is from left to
+ right in ascending order. The default is a single lossless quality layer.
+ Same for JPT, JC2, and J2K</td>
+ </tr>
+
+ <tr>
+ <td>jp2:rate=<var>value</var></td>
+ <td>Specify the compression factor to use while writing JPEG-2000 files. The compression factor is the reciprocal of the compression ratio. The valid
+ range is 0.0 to 1.0, with 1.0 indicating lossless compression. If defined,
+ this value overrides the -quality setting. A quality setting of 75
+ results in a rate value of 0.06641. Same for JPT, JC2, and J2K</td>
+ </tr>
+
+ <tr>
+ <td>jp2:reduce-factor=<var>value</var></td>
+ <td>Sets the number of highest resolution levels to be discarded.Same for
+ JPT, JC2, and J2K</td>
+ </tr>
+
+ <tr>
+ <td>jpeg:block-smoothing=<var>on|off</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>jpeg:colors=<var>value</var></td>
+ <td>Set the desired number of colors and let the JPEG encoder do the
+ quantizing.</td>
+ </tr>
+
+ <tr>
+ <td>jpeg:dct-method=<var>value</var></td>
+ <td>Choose from <code>default</code>, <code>fastest</code>,
+ <code>float</code>, <code>ifast</code>, and <code>islow</code>.</td>
+ </tr>
+
+ <tr>
+ <td>jpeg:extent=<var>value</var></td>
+ <td>Restrict the maximum JPEG file size, for example <code>-define
+ jpeg:extent=400KB</code>. The JPEG encoder will search for the highest
+ compression quality level that results in an output file that does not
+ exceed the value. The <code>-quality</code> option also will be respected
+ starting with version 6.9.2-5. Between 6.9.1-0 and 6.9.2-4, add -quality
+ 100 in order for the jpeg:extent to work properly. Prior to 6.9.1-0, the
+ -quality setting was ignored.</td>
+ </tr>
+
+ <tr>
+ <td>jpeg:fancy-upsampling=<var>on|off</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>jpeg:optimize-coding=<var>on|off</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>jpeg:q-table=<var>table</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>jpeg:sampling-factor=<var>sampling-factor-string</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>jpeg:size=<var>geometry</var></td>
+ <td>Set the size hint of a JPEG image, for
+ example, <code>-define jpeg:size=128x128</code>.
+ It is most useful for increasing performance and reducing the memory
+ requirements when reducing the size of a large JPEG image.</td>
+ </tr>
+
+ <tr>
+ <td>json:features</td>
+ <td>includes features in verbose information</td>
+ </tr>
+
+ <tr>
+ <td>json:limit</td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>json:locate</td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>json:moments</td>
+ <td>includes image moments in verbose information</td>
+ </tr>
+
+ <tr>
+ <td>magick:format=<var>value</var></td>
+ <td>Set the image encoding format use when writing a C-style header.
+ This is the same as "h:format=format" described above.</td>
+ </tr>
+
+ <tr>
+ <td>mng:need-cacheoff</td>
+ <td>turn playback caching off for streaming MNG.</td>
+ </tr>
+
+ <tr>
+ <td>morphology:compose=<var>compose-method</var></td>
+ <td>Specifies how to merge results generated by multiple<a
+ href="command-line-options.html#morphology" >-morphology</a> kernel. The default is none. One
+ typical value is 'lighten' as used, for example, with the sobel edge
+ kernels. </td>
+ </tr>
+
+ <tr>
+ <td>morphology:showKernel=<var>1</var></td>
+ <td>Outputs (to 'standard error') all the information about a generated <a
+ href="command-line-options.html#morphology" >-morphology</a> kernel.</td>
+ </tr>
+
+ <tr>
+ <td>pcl:fit-to-page=<var>true</var></td>
+ </tr>
+
+ <tr>
+ <td>pdf:fit-page=<var>geometry</var></td>
+ <td> geometry specifies the scaling dimensions for resizing when the PDF is
+ being read. The geometry is either WxH{%} or page size. No offsets are
+ allowed. (introduced in IM 6.8.8-8)</td>
+ </tr>
+
+ <tr>
+ <td>pdf:fit-to-page=<var>true</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>pdf:use-cropbox=<var>true</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>pdf:use-trimbox=<var>true</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>pdf:stop-on-error=<var>true</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>pdf:pdf:page-direction=<var>right-to-left</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>png:bit-depth=<var>value</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>png:color-type=<var>value</var></td>
+ <td>desired bit-depth and color-type for PNG output. You can force the PNG encoder to use a different bit-depth and color-type than it would have
+ normally selected, but only if this does not cause any loss of image
+ quality. Any attempt to reduce image quality is treated as an error and no
+ PNG file is written. E.g., if you have a 1-bit black-and-white image, you
+ can use these "defines" to cause it to be written as an 8-bit grayscale,
+ indexed, or even a 64-bit RGBA. But if you have a 16-million color image,
+ you cannot force it to be written as a grayscale or indexed PNG. If you
+ wish to do this, you must use the appropriate <a href="command-line-options.html#depth">-depth</a>,
+ <a href="command-line-options.html#colors">-colors</a>, or <a href="command-line-options.html#type">-type</a> directives to
+ reduce the image quality prior to using the PNG encoder. Note that in
+ indexed PNG files, "bit-depth" refers to the number of bits per index,
+ which can be 1, 2, 4, or 8. In such files, the color samples always have
+ 8-bit depth.</td>
+ </tr>
+
+ <tr>
+ <td>png:compression-filter=<var>value</var></td>
+ <td> valid values are 0 through 9. 0-4 are the corresponding PNG filters,
+ 5 means adaptive filtering except for images with a colormap, 6 means
+ adaptive filtering for all images, 7 means MNG "loco" compression, 8 means
+ Z_RLE strategy with adaptive filtering, and 9 means Z_RLE strategy with no
+ filtering.</td>
+ </tr>
+
+ <tr>
+ <td>png:compression-level=<var>value</var></td>
+ <td> valid values are 0 through 9, with 0 providing the least but fastest
+ compression and 9 usually providing the best and always the slowest.</td>
+ </tr>
+
+ <tr>
+ <td>png:compression-strategy=<var>value</var></td>
+ <td> valid values are 0 through 4, meaning default, filtered, huffman_only,
+ rle, and fixed ZLIB compression strategy. If you are using an old zlib
+ that does not support Z_RLE (before 1.2.0) or Z_FIXED (before 1.2.2.2),
+ values 3 and 4, respectively, will use the zlib default strategy
+ instead.</td>
+ </tr>
+
+ <tr>
+ <td>png:format=<var>value</var></td>
+ <td> valid values are <var>png8</var>, <var>png24</var>,
+ <var>png32</var>, <var>png48</var>,
+ <var>png64</var>, and <var>png00</var>.
+ This property can be useful for specifying
+ the specific PNG format to be used, when the usual method of prepending the
+ format name to the output filename is inconvenient, such as when writing
+ a PNG-encoded ICO file or when using <a href="mogrify.html">mogrify</a>.
+ Value = <var>png8</var> reduces the number of colors to 256,
+ only one of which may be fully transparent, if necessary. The other
+ values do not force any reduction of quality; it is an error to request
+ a format that cannot represent the image data without loss (except that
+ it is allowed to reduce the bit-depth from 16 to 8 for all formats).
+ Value = <var>png24</var> and <var>png48</var>
+ allow transparency, only if a single color is fully transparent and that
+ color does not also appear in an opaque pixel; such transparency is
+ written in a PNG <code>tRNS</code> chunk.
+ Value = <var>png00</var> causes the image to inherit its
+ color-type and bit-depth from the input image, if the input was also
+ a PNG.</td>
+ </tr>
+
+ <tr>
+ <td>png:exclude-chunk=<var>value</var></td>
+ </tr>
+
+ <tr>
+ <td>png:include-chunk=<var>value</var></td>
+ <td>ancillary chunks to be excluded from or included in PNG output.
+
+ <p>The <var>value</var> can be the name of a PNG chunk-type such
+ as <var>bKGD</var>, a comma-separated list of chunk-names
+ (which can include the word <var>date</var>, the word
+ <var>all</var>, or the word <var>none</var>).
+ Although PNG chunk-names are case-dependent, you can use all lowercase
+ names if you prefer.</p>
+
+ <p>The "include-chunk" and "exclude-chunk" lists only affect the behavior
+ of the PNG encoder and have no effect on the PNG decoder.</p>
+
+ <p>As a special case, if the <code>sRGB</code> chunk is excluded and
+ the <code>gAMA</code> chunk is included, the <code>gAMA</code> chunk will
+ only be written if gamma is not 1/2.2, since most decoders assume
+ sRGB and gamma=1/2.2 when no colorspace information is included in
+ the PNG file. Because the list is processed from left to right, you
+ can achieve this with a single define:</p>
+
+<pre class="highlight"><code>-define png:include-chunk=none,gAMA
+</code></pre>
+
+ <p>As a special case, if the <code>sRGB</code> chunk is not excluded and
+ the PNG encoder recognizes that the image contains the sRGB ICC profile,
+ the PNG encoder will write the <code>sRGB</code> chunk instead of the
+ entire ICC profile. To force the PNG encoder to write the sRGB
+ profile as an <code>iCCP</code> chunk in the output PNG instead of the
+ <code>sRGB</code> chunk, exclude the <code>sRGB</code> chunk.</p>
+
+ <p>The critical PNG chunks <code>IHDR</code>, <code>PLTE</code>,
+ <code>IDAT</code>, and <code>IEND</code> cannot be excluded. Any such
+ entries appearing in the list will be ignored.</p>
+
+ <p>If the ancillary PNG <code>tRNS</code> chunk is excluded and the
+ image has transparency, the PNG colortype is forced to be 4 or 6
+ (GRAY_ALPHA or RGBA). If the image is not transparent, then the
+ <code>tRNS</code> chunk isn't written anyhow, and there is no effect
+ on the PNG colortype of the output image.</p>
+
+ <p>The <a href="command-line-options.html#strip">-strip</a> option does the equivalent of the
+ following for PNG output:</p>
+
+<pre class="highlight"><code>-define png:exclude-chunk=EXIF,iCCP,iTXt,sRGB,tEXt,zCCP,zTXt,date
+</code></pre>
+
+ <p>The default behavior is to include all known PNG ancillary chunks
+ plus ImageMagick's private <code>vpAg</code> ("virtual page") chunk,
+ and to exclude all PNG chunks that are unknown to ImageMagick,
+ regardless of their PNG "copy-safe" status as described in the
+ PNG specification.</p>
+
+ <p>Any chunk names that are not known to ImageMagick are ignored
+ if they appear in either the "include-chunk" or "exclude-chunk" list.
+ The ancillary chunks currently known to ImageMagick are
+ <code>bKGD</code>, <code>cHRM</code>, <code>gAMA</code>, <code>iCCP</code>,
+ <code>oFFs</code>, <code>pHYs</code>, <code>sRGB</code>, <code>tEXt</code>,
+ <code>tRNS</code>, <code>vpAg</code>, and <code>zTXt</code>.</p>
+
+ <p>You can also put <code>date</code> in the list to include or exclude
+ the "Date:create" and "Date:modify" text chunks that ImageMagick normally
+ inserts in the output PNG.</p></td>
+ </tr>
+
+ <tr>
+ <td>png:ignore-crc[=<var>true</var>]</td>
+ <td>When you know your image has no CRC or ADLER32 errors, this can speed up
+ decoding. It is also helpful in debugging bug reports from "fuzzers"</td>
+ </tr>
+
+ <tr>
+ <td>png:preserve-colormap[=<var>true</var>]</td>
+ <td>Use the existing image->colormap. Normally the PNG encoder will
+ try to optimize the palette, eliminating unused entries and putting
+ the transparent colors first. If this flag is set, that behavior
+ is suppressed.</td>
+ </tr>
+
+ <tr>
+ <td>png:preserve-iCCP[=<var>true</var>]</td>
+ <td>By default, the PNG decoder and encoder examine any ICC profile
+ that is present, either from an <code>iCCP</code> chunk in the PNG
+ input or supplied via an option, and if the profile is recognized
+ to be the sRGB profile, converts it to the <code>sRGB</code> chunk.
+ You can use <code>-define png:preserve-iCCP</code> to prevent
+ this from happening; in such cases the <code>iCCP</code> chunk
+ will be read or written and no <code>sRGB</code> chunk will be
+ written. There are some ICC profiles that claim to be sRGB but
+ have various errors that cause them to be rejected by libpng16; such
+ profiles are recognized anyhow and converted to the <code>sRGB</code>
+ chunk, but are rejected if the <code>-define png:preserve-iCCP</code>
+ is present. Note that not all "sRGB" ICC profiles are recognized
+ yet; we will add them to the list as we encounter them.</td>
+ </tr>
+
+ <tr>
+ <td>png:swap-bytes[=<var>true</var>]</td>
+ <td>The PNG specification requires that any multi-byte integers be stored in network byte order (MSB-LSB endian). This option allows you to
+ fix any invalid PNG files that have 16-bit samples stored incorrectly
+ in little-endian order (LSB-MSB). The "-define png:swap-bytes" option
+ must appear before the input filename on the commandline. The swapping
+ is done during the libpng decoding operation.</td>
+ </tr>
+
+ <tr>
+ <td>profile:skip=<var>name1,name2,...</var></td>
+ <td>Skip the named profile[s] when reading the image. Use skip="*" to
+ skip all named profiles in the image. Many named profiles exist,
+ including ICC, EXIF, APP1, IPTC, XMP, and others.</td>
+ </tr>
+
+ <tr>
+ <td>ps:imagemask</td>
+ <td>If the ps:imagemask flag is defined, the PS3 and EPS3 coders will
+ create Postscript files that render bilevel images with the Postscript
+ imagemask operator instead of the image operator.</td>
+ </tr>
+
+ <tr>
+ <td>psd:additional-info=all|selective</td>
+ <td>This option should only be used when converting from a PSD file to another PSD file. This should be placed after the image is read. The two options are 'all' and 'selective'. The 'selective' option will preserve all additional information that is not related to the geometry of the image. The 'all' option should only be used when the geometry of the image has not been changed. This option is helpful when transferring non-simple layers, such as adjustment layers from the input PSD file to the output PSD file. If this option is not used, the additional information will not be preserved. This define is available as of Imagemagick version 6.9.5-8.
+</td>
+ </tr>
+
+ <tr>
+ <td>psd:alpha-unblend=off</td>
+ <td>Disables new automatic un-blending of transparency with the base image
+ for the flattened layer 0 before adding the alpha channel to the output
+ image. This define must be placed before the input psd image. (Available
+ as of IM 6.9.2.5). The automatic un-blending is new to IM 6.9.2.5 and
+ prevents the transparency from being applied twice in the output
+ image. This option should be set before reading the image.</td>
+ </tr>
+
+ <tr>
+ <td>psd:preserve-opacity-mask=true</td>
+ <td>This option should only be used when converting from a PSD file to another PSD file. It will preserve the opacity mask of a layer and add it back to the layer when the image is saved. Setting this to 'true' will enable this feature. This define is available as of Imagemagick version 6.9.5-10.
+</td>
+ </tr>
+
+ <tr>
+ <td>preserve-timestamp=<var>{True, False}</var></td>
+ <td>Preserve file timestamp (<code>mogrify</code> only).</td>
+ </tr>
+
+ <tr>
+ <td>q-table=<var>quantization-table.xml</var></td>
+ <td>Custom JPEG quantization tables.</td>
+ </tr>
+
+ <tr>
+ <td>quantum:format=<var>type</var></td>
+ <td>Set the type to <code>floating-point</code> to specify a floating-point
+ format for raw files (e.g. GRAY:) or for MIFF and TIFF images in HDRI mode
+ to preserve negative values. If <a href="command-line-options.html#depth">-depth</a> 16 is
+ included, the result is a single precision floating point format.
+ If <a href="command-line-options.html#depth">-depth</a> 32 is included, the result is
+ double precision floating point format. For signed pixel data, use <code>-define quantum:format=signed</code>.</td>
+ </tr>
+
+ <tr>
+ <td>quantum:polarity=<var>photometric-interpretation</var></td>
+ <td>Set the photometric-interpretation of an image (typically for TIFF
+ image file format) to either <code>min-is-black</code> (default) or
+ <code>min-is-white</code>.</td>
+ </tr>
+
+ <tr>
+ <td>sample:offset=<var>geometry</var></td>
+ <td>Location of the sampling point within the sub-region being sampled,
+ expressed as percentages (see <a href="command-line-options.html#sample" >-sample</a>).</td>
+ </tr>
+
+ <tr>
+ <td>showKernel=<var>1</var></td>
+ <td>Outputs (to 'standard error') all the information about a generated <a
+ href="command-line-options.html#morphology" >-morphology</a> kernel.</td>
+ </tr>
+
+ <tr>
+ <td>stream:buffer-size=<var>value</var></td>
+ <td>Set the stream buffer size. Select 0 for unbuffered I/O.</td>
+ </tr>
+
+ <tr>
+ <td>tiff:alpha=<var>associated|unassociated|unspecified</var></td>
+ <td>Specify the alpha extra samples as associated, unassociated or
+ unspecified </td>
+ </tr>
+
+ <tr>
+ <td>tiff:endian=<var>msb|lsb</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>tiff:exif-properties=<var>true</var></td>
+ <td>Enables reading the EXIF properties.</td>
+ </tr>
+
+ <tr>
+ <td>tiff:fill-order=<var>msb|lsb</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>tiff:ignore-layers=<var>true</var></td>
+ <td>Ignores the photoshop layers.</td>
+ </tr>
+
+ <tr>
+ <td>tiff:ignore-tags=<var>comma-separate-list-of-tag-IDs</var></td>
+ <td>Allows one or more tag ID values to be ignored.</td>
+ </tr>
+
+ <tr>
+ <td>tiff:predictor=<var>[1, 2 or 3]</var></td>
+ <td>A mathematical operator that is applied to the image data before an encoding scheme is applied. The general idea is that subsequent pixels of an image resemble each other. Thus, substracting the information from a pixel that is already contained in previous one is likely to reduce its information density considerably and aid subsequent compression. 1 = No prediction scheme used before coding. 2 = Horizontal differencing. 3 = Floating point horizontal differencing.</td>
+ </tr>
+
+ <tr>
+ <td>tiff:rows-per-strip=<var>value</var></td>
+ <td>Sets the number of rows per strip</td>
+ </tr>
+
+ <tr>
+ <td>tiff:tile-geometry=<var>WxH</var></td>
+ <td>Sets the tile size for pyramid tiffs. Requires the suffix
+ PTIF: before the outputname</td>
+ </tr>
+
+ <tr>
+ <td>type:features=<var>string</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>type:hinting=<var>off</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>txt:compliance=<var>css</var></td>
+ <td>The first argument of a hsl() color is integer, not percentage</td>
+ </tr>
+
+ <tr>
+ <td>x:screen=<var>true</var></td>
+ <td>Obtains the image from the root window </td>
+ </tr>
+
+ <tr>
+ <td>x:silent=<var>true</var></td>
+ <td>Turns off the beep when importing an image </td>
+ </tr>
+</table>
+
+<p>For example, to create a postscript file that will render only the black
+pixels of a bilevel image, use:</p>
<pre class="p-3 mb-2 text-body-secondary bg-body-tertiary cli"><samp>magick bilevel.tif -define ps:imagemask eps3:stencil.ps
</samp></pre>
|