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See <a href="command-line-processing.html">Command Line Processing</a> for advice on how to structure your <code>convert</code> command or see below for example usages of the command.</p> 91 92<p>We list a few examples of the <code>convert</code> command here to illustrate its usefulness and ease of use. To get started, lets convert an image in the JPEG format to PNG:</p> 93 94<pre class="highlight"><code>magick convert rose.jpg rose.png 95</code></pre> 96 97<p>Next, we reduce the image size before it is written to the PNG format:</p> 98 99<pre class="highlight"><code>magick convert rose.jpg -resize 50% rose.png 100</code></pre> 101 102<ul> 103 <a href="../images/rose.jpg"> 104 <img src="../images/rose.jpg" width="70" height="46" alt="rose" /> 105 </a> 106 <img style="margin-top:13px; margin-bottom:13px;" src="../images/right.gif" width="20" height="20" alt="==>" /> 107 <a href="../images/rose.png"> 108 <img style="margin-top:11px; margin-bottom:12px;" src="../images/rose.png" width="35" height="23" alt="rose" /> 109 </a> 110</ul> 111 112<p>You can combine multiple image-processing operations to produce complex results:</p> 113 114<pre class="highlight"><code>magick convert -size 320x85 canvas:none -font Bookman-DemiItalic -pointsize 72 \ 115 -draw "text 25,60 \'Magick\'" -channel RGBA -blur 0x6 -fill darkred -stroke magenta \ 116 -draw "text 20,55 \'Magick\'" fuzzy-magick.png 117</code></pre> 118 119<ul> 120 <a href="../images/fuzzy-magick.png"><img src="../images/fuzzy-magick.png" width="320" height="85" alt="fuzzy-magick" /></a> 121</ul> 122 123<p>or here we resize an image with improved quality:</p> 124 125<pre class="highlight"><code>magick convert input.png -colorspace RGB +sigmoidal-contrast 11.6933 \ 126 -define filter:filter=Sinc -define filter:window=Jinc -define filter:lobes=3 \ 127 -resize 400% -sigmoidal-contrast 11.6933 -colorspace sRGB output.png'); 128</code></pre> 129 130<p>You can find additional examples of using <code>convert</code> in <a href="../Usage/">Examples of ImageMagick Usage</a>.</p> 131 132<h2><a class="anchor" id="options"></a>Option Summary</h2> 133 134<p>The <code>convert</code> command recognizes these options. Click on an option to get more details about how that option works.</p> 135 136<div class="table-responsive" style="font-size:87.5% !important;"> 137<table class="table table-sm table-striped"> 138 <tr> 139 <td><a href="command-line-options.html#adaptive-blur">-adaptive-blur <var>geometry</var></a></td> 140 <td>adaptively blur pixels; decrease effect near edges</td> 141 </tr> 142 143 <tr> 144 <td><a href="command-line-options.html#adaptive-resize">-adaptive-resize <var>geometry</var></a></td> 145 <td>adaptively resize image with data dependent triangulation.</td> 146 </tr> 147 148 <tr> 149 <td><a href="command-line-options.html#adaptive-sharpen">-adaptive-sharpen <var>geometry</var></a></td> 150 <td>adaptively sharpen pixels; increase effect near edges</td> 151 </tr> 152 153 <tr> 154 <td><a href="command-line-options.html#adjoin">-adjoin</a></td> 155 <td>join images into a single multi-image file</td> 156 </tr> 157 158 <tr> 159 <td><a href="command-line-options.html#affine">-affine <var>matrix</var></a></td> 160 <td>affine transform matrix</td> 161 </tr> 162 163 <tr> 164 <td><a href="command-line-options.html#alpha">-alpha</a></td> 165 <td>on, activate, off, deactivate, set, opaque, copy", 166transparent, extract, background, or shape the alpha channel</td> 167 </tr> 168 169 <tr> 170 <td><a href="command-line-options.html#annotate">-annotate <var>geometry text</var></a></td> 171 <td>annotate the image with text</td> 172 </tr> 173 174 <tr> 175 <td><a href="command-line-options.html#antialias">-antialias</a></td> 176 <td>remove pixel-aliasing</td> 177 </tr> 178 179 <tr> 180 <td><a href="command-line-options.html#append">-append</a></td> 181 <td>append an image sequence</td> 182 </tr> 183 184 <tr> 185 <td><a href="command-line-options.html#authenticate">-authenticate <var>value</var></a></td> 186 <td>decipher image with this password</td> 187 </tr> 188 189 <tr> 190 <td><a href="command-line-options.html#auto-gamma">-auto-gamma</a></td> 191 <td>automagically adjust gamma level of image</td> 192 </tr> 193 194 <tr> 195 <td><a href="command-line-options.html#auto-level">-auto-level</a></td> 196 <td>automagically adjust color levels of image</td> 197 </tr> 198 199 <tr> 200 <td><a href="command-line-options.html#auto-orient">-auto-orient</a></td> 201 <td>automagically orient image</td> 202 </tr> 203 204 <tr> 205 <td><a href="command-line-options.html#auto-threshold">-auto-threshold <var>method</var></a></td> 206 <td>automatically perform image thresholding</td> 207 </tr> 208 209 <tr> 210 <td><a href="command-line-options.html#background">-background <var>color</var></a></td> 211 <td>background color</td> 212 </tr> 213 214 <tr> 215 <td><a href="command-line-options.html#bench">-bench <var>iterations</var></a></td> 216 <td>measure performance</td> 217 </tr> 218 219 <tr> 220 <td><a href="command-line-options.html#bias">-bias <var>value</var></a></td> 221 <td>add bias when convolving an image</td> 222 </tr> 223 224 <tr> 225 <td><a href="command-line-options.html#black-threshold">-black-threshold <var>value</var></a></td> 226 <td>force all pixels below the threshold into black</td> 227 </tr> 228 229 <tr> 230 <td><a href="command-line-options.html#blue-primary">-blue-primary <var>point</var></a></td> 231 <td>chromaticity blue primary point</td> 232 </tr> 233 234 <tr> 235 <td><a href="command-line-options.html#blue-shift">-blue-shift <var>factor</var></a></td> 236 <td>simulate a scene at nighttime in the moonlight</td> 237 </tr> 238 239 <tr> 240 <td><a href="command-line-options.html#blur">-blur <var>geometry</var></a></td> 241 <td>reduce image noise and reduce detail levels</td> 242 </tr> 243 244 <tr> 245 <td><a href="command-line-options.html#border">-border <var>geometry</var></a></td> 246 <td>surround image with a border of color</td> 247 </tr> 248 249 <tr> 250 <td><a href="command-line-options.html#bordercolor">-bordercolor <var>color</var></a></td> 251 <td>border color</td> 252 </tr> 253 254 <tr> 255 <td><a href="command-line-options.html#brightness-contrast">-brightness-contrast <var>geometry</var></a></td> 256 <td>improve brightness / contrast of the image</td> 257 </tr> 258 259 <tr> 260 <td><a href="command-line-options.html#canny">-canny <var>geometry</var></a></td> 261 <td>use a multi-stage algorithm to detect a wide range of edges in the image</td> 262 </tr> 263 264 <tr> 265 <td><a href="command-line-options.html#caption">-caption <var>string</var></a></td> 266 <td>assign a caption to an image</td> 267 </tr> 268 269 <tr> 270 <td><a href="command-line-options.html#cdl">-cdl <var>filename</var></a></td> 271 <td>color correct with a color decision list</td> 272 </tr> 273 274 <tr> 275 <td><a href="command-line-options.html#channel">-channel <var>type</var></a></td> 276 <td>apply option to select image channels</td> 277 </tr> 278 279 <tr> 280 <td><a href="command-line-options.html#charcoal">-charcoal <var>radius</var></a></td> 281 <td>simulate a charcoal drawing</td> 282 </tr> 283 284 <tr> 285 <td><a href="command-line-options.html#chop">-chop <var>geometry</var></a></td> 286 <td>remove pixels from the image interior</td> 287 </tr> 288 289 <tr> 290 <td><a href="command-line-options.html#clahe">-clahe <var>geometry</var></a></td> 291 <td>contrast limited adaptive histogram equalization</td> 292 </tr> 293 294 <tr> 295 <td><a href="command-line-options.html#clamp">-clamp</a></td> 296 <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.</td> 297 </tr> 298 299 <tr> 300 <td><a href="command-line-options.html#clip">-clip</a></td> 301 <td>clip along the first path from the 8BIM profile</td> 302 </tr> 303 304 <tr> 305 <td><a href="command-line-options.html#clip-mask">-clip-mask</a> <var>filename</var></td> 306 <td>associate clip mask with the image</td> 307 </tr> 308 309 <tr> 310 <td><a href="command-line-options.html#clip-path">-clip-path <var>id</var></a></td> 311 <td>clip along a named path from the 8BIM profile</td> 312 </tr> 313 314 <tr> 315 <td><a href="command-line-options.html#clone">-clone <var>index</var></a></td> 316 <td>clone an image</td> 317 </tr> 318 319 <tr> 320 <td><a href="command-line-options.html#clut">-clut</a></td> 321 <td>apply a color lookup table to the image</td> 322 </tr> 323 324 <tr> 325 <td><a href="command-line-options.html#connected-components">-connected-components <var>connectivity</var></a></td> 326 <td>connected-components uniquely labeled, choose from 4 or 8 way connectivity</td> 327 </tr> 328 329 <tr> 330 <td><a href="command-line-options.html#contrast-stretch">-contrast-stretch <var>geometry</var></a></td> 331 <td>improve the contrast in an image by `stretching' the range of intensity value</td> 332 </tr> 333 334 <tr> 335 <td><a href="command-line-options.html#coalesce">-coalesce</a></td> 336 <td>merge a sequence of images</td> 337 </tr> 338 339 <tr> 340 <td><a href="command-line-options.html#colorize">-colorize <var>value</var></a></td> 341 <td>colorize the image with the fill color</td> 342 </tr> 343 344 <tr> 345 <td><a href="command-line-options.html#color-matrix">-color-matrix <var>matrix</var></a></td> 346 <td>apply color correction to the image.</td> 347 </tr> 348 349 <tr> 350 <td><a href="command-line-options.html#colors">-colors <var>value</var></a></td> 351 <td>preferred number of colors in the image</td> 352 </tr> 353 354 <tr> 355 <td><a href="command-line-options.html#colorspace">-colorspace <var>type</var></a></td> 356 <td>set image colorspace</td> 357 </tr> 358 359 <tr> 360 <td><a href="command-line-options.html#combine">-combine</a></td> 361 <td>combine a sequence of images</td> 362 </tr> 363 364 <tr> 365 <td><a href="command-line-options.html#comment">-comment <var>string</var></a></td> 366 <td>annotate image with comment</td> 367 </tr> 368 369 <tr> 370 <td><a href="command-line-options.html#compare">-compare</a></td> 371 <td>compare image</td> 372 </tr> 373 374 <tr> 375 <td><a href="command-line-options.html#complex">-complex<var>operator</var></a></td> 376 <td>perform complex mathematics on an image sequence</td> 377 </tr> 378 379 <tr> 380 <td><a href="command-line-options.html#compose">-compose <var>operator</var></a></td> 381 <td>set image composite operator</td> 382 </tr> 383 384 <tr> 385 <td><a href="command-line-options.html#composite">-composite</a></td> 386 <td>composite image</td> 387 </tr> 388 389 <tr> 390 <td><a href="command-line-options.html#compress">-compress <var>type</var></a></td> 391 <td>image compression type</td> 392 </tr> 393 394 <tr> 395 <td><a href="command-line-options.html#contrast">-contrast</a></td> 396 <td>enhance or reduce the image contrast</td> 397 </tr> 398 399 <tr> 400 <td><a href="command-line-options.html#convolve">-convolve <var>coefficients</var></a></td> 401 <td>apply a convolution kernel to the image</td> 402 </tr> 403 404 <tr> 405 <td><a href="command-line-options.html#copy">-copy <var>geometry</var> <var>offset</var></a></td> 406 <td>copy pixels from one area of an image to another</td> 407 </tr> 408 409 <tr> 410 <td><a href="command-line-options.html#crop">-crop <var>geometry</var></a></td> 411 <td>crop the image</td> 412 </tr> 413 414 <tr> 415 <td><a href="command-line-options.html#cycle">-cycle <var>amount</var></a></td> 416 <td>cycle the image colormap</td> 417 </tr> 418 419 <tr> 420 <td><a href="command-line-options.html#decipher">-decipher <var>filename</var></a></td> 421 <td>convert cipher pixels to plain</td> 422 </tr> 423 424 <tr> 425 <td><a href="command-line-options.html#debug">-debug <var>events</var></a></td> 426 <td>display copious debugging information</td> 427 </tr> 428 429 <tr> 430 <td><a href="command-line-options.html#define">-define <var>format:option</var></a></td> 431 <td>define one or more image format options</td> 432 </tr> 433 434 <tr> 435 <td><a href="command-line-options.html#deconstruct">-deconstruct</a></td> 436 <td>break down an image sequence into constituent parts</td> 437 </tr> 438 439 <tr> 440 <td><a href="command-line-options.html#delay">-delay <var>value</var></a></td> 441 <td>display the next image after pausing</td> 442 </tr> 443 444 <tr> 445 <td><a href="command-line-options.html#delete">-delete <var>index</var></a></td> 446 <td>delete the image from the image sequence</td> 447 </tr> 448 449 <tr> 450 <td><a href="command-line-options.html#density">-density <var>geometry</var></a></td> 451 <td>horizontal and vertical density of the image</td> 452 </tr> 453 454 <tr> 455 <td><a href="command-line-options.html#depth">-depth <var>value</var></a></td> 456 <td>image depth</td> 457 </tr> 458 459 <tr> 460 <td><a href="command-line-options.html#despeckle">-despeckle</a></td> 461 <td>reduce the speckles within an image</td> 462 </tr> 463 464 <tr> 465 <td><a href="command-line-options.html#direction">-direction <var>type</var></a></td> 466 <td>render text right-to-left or left-to-right</td> 467 </tr> 468 469 <tr> 470 <td><a href="command-line-options.html#display">-display <var>server</var></a></td> 471 <td>get image or font from this X server</td> 472 </tr> 473 474 <tr> 475 <td><a href="command-line-options.html#dispose">-dispose <var>method</var></a></td> 476 <td>layer disposal method</td> 477 </tr> 478 479 <tr> 480 <td><a href="command-line-options.html#distribute-cache">-distribute-cache <var>port</var></a></td> 481 <td>launch a distributed pixel cache server</td> 482 </tr> 483 484 <tr> 485 <td><a href="command-line-options.html#distort">-distort <var>type coefficients</var></a></td> 486 <td>distort image</td> 487 </tr> 488 489 <tr> 490 <td><a href="command-line-options.html#dither">-dither <var>method</var></a></td> 491 <td>apply error diffusion to image</td> 492 </tr> 493 494 <tr> 495 <td><a href="command-line-options.html#draw">-draw <var>string</var></a></td> 496 <td>annotate the image with a graphic primitive</td> 497 </tr> 498 499 <tr> 500 <td><a href="command-line-options.html#duplicate">-duplicate <var>count,indexes</var></a></td> 501 <td>duplicate an image one or more times</td> 502 </tr> 503 504 <tr> 505 <td><a href="command-line-options.html#edge">-edge <var>radius</var></a></td> 506 <td>apply a filter to detect edges in the image</td> 507 </tr> 508 509 <tr> 510 <td><a href="command-line-options.html#emboss">-emboss <var>radius</var></a></td> 511 <td>emboss an image</td> 512 </tr> 513 514 <tr> 515 <td><a href="command-line-options.html#encipher">-encipher <var>filename</var></a></td> 516 <td>convert plain pixels to cipher pixels</td> 517 </tr> 518 519 <tr> 520 <td><a href="command-line-options.html#encoding">-encoding <var>type</var></a></td> 521 <td>text encoding type</td> 522 </tr> 523 524 <tr> 525 <td><a href="command-line-options.html#endian">-endian <var>type</var></a></td> 526 <td>endianness (MSB or LSB) of the image</td> 527 </tr> 528 529 <tr> 530 <td><a href="command-line-options.html#enhance">-enhance</a></td> 531 <td>apply a digital filter to enhance a noisy image</td> 532 </tr> 533 534 <tr> 535 <td><a href="command-line-options.html#equalize">-equalize</a></td> 536 <td>perform histogram equalization to an image</td> 537 </tr> 538 539 <tr> 540 <td><a href="command-line-options.html#evaluate">-evaluate <var>operator value</var></a></td> 541 <td>evaluate an arithmetic, relational, or logical expression</td> 542 </tr> 543 544 <tr> 545 <td><a href="command-line-options.html#evaluate-sequence">-evaluate-sequence <var>operator</var></a></td> 546 <td>evaluate an arithmetic, relational, or logical expression for an image sequence</td> 547 </tr> 548 549 <tr> 550 <td><a href="command-line-options.html#extent">-extent <var>geometry</var></a></td> 551 <td>set the image size</td> 552 </tr> 553 554 <tr> 555 <td><a href="command-line-options.html#extract">-extract <var>geometry</var></a></td> 556 <td>extract area from image</td> 557 </tr> 558 559 <tr> 560 <td><a href="command-line-options.html#family">-family <var>name</var></a></td> 561 <td>render text with this font family</td> 562 </tr> 563 564 <tr> 565 <td><a href="command-line-options.html#features">-features <var>distance</var></a></td> 566 <td>analyze image features (e.g. contract, correlations, etc.).</td> 567 </tr> 568 569 <tr> 570 <td><a href="command-line-options.html#fft">-fft</a></td> 571 <td>implements the discrete Fourier transform (DFT)</td> 572 </tr> 573 574 <tr> 575 <td><a href="command-line-options.html#fill">-fill <var>color</var></a></td> 576 <td>color to use when filling a graphic primitive</td> 577 </tr> 578 579 <tr> 580 <td><a href="command-line-options.html#filter">-filter <var>type</var></a></td> 581 <td>use this filter when resizing an image</td> 582 </tr> 583 584 <tr> 585 <td><a href="command-line-options.html#flatten">-flatten</a></td> 586 <td>flatten a sequence of images</td> 587 </tr> 588 589 <tr> 590 <td><a href="command-line-options.html#flip">-flip</a></td> 591 <td>flip image in the vertical direction</td> 592 </tr> 593 594 <tr> 595 <td><a href="command-line-options.html#floodfill">-floodfill <var>geometry color</var></a></td> 596 <td>floodfill the image with color</td> 597 </tr> 598 599 <tr> 600 <td><a href="command-line-options.html#flop">-flop</a></td> 601 <td>flop image in the horizontal direction</td> 602 </tr> 603 604 <tr> 605 <td><a href="command-line-options.html#font">-font <var>name</var></a></td> 606 <td>render text with this font</td> 607 </tr> 608 609 <tr> 610 <td><a href="command-line-options.html#format_identify_">-format <var>string</var></a></td> 611 <td>output formatted image characteristics</td> 612 </tr> 613 614 <tr> 615 <td><a href="command-line-options.html#frame">-frame <var>geometry</var></a></td> 616 <td>surround image with an ornamental border</td> 617 </tr> 618 619 <tr> 620 <td><a href="command-line-options.html#function">-function <var>name</var></a></td> 621 <td>apply a function to the image</td> 622 </tr> 623 624 <tr> 625 <td><a href="command-line-options.html#fuzz">-fuzz <var>distance</var></a></td> 626 <td>colors within this distance are considered equal</td> 627 </tr> 628 629 <tr> 630 <td><a href="command-line-options.html#fx">-fx <var>expression</var></a></td> 631 <td>apply mathematical expression to an image channel(s)</td> 632 </tr> 633 634 <tr> 635 <td><a href="command-line-options.html#gamma">-gamma <var>value</var></a></td> 636 <td>level of gamma correction</td> 637 </tr> 638 639 <tr> 640 <td><a href="command-line-options.html#gaussian-blur">-gaussian-blur <var>geometry</var></a></td> 641 <td>reduce image noise and reduce detail levels</td> 642 </tr> 643 644 <tr> 645 <td><a href="command-line-options.html#geometry">-geometry <var>geometry</var></a></td> 646 <td>preferred size or location of the image</td> 647 </tr> 648 649 <tr> 650 <td><a href="command-line-options.html#gravity">-gravity <var>type</var></a></td> 651 <td>horizontal and vertical text placement</td> 652 </tr> 653 654 <tr> 655 <td><a href="command-line-options.html#grayscale">-grayscale <var>method</var></a></td> 656 <td>convert image to grayscale</td> 657 </tr> 658 659 <tr> 660 <td><a href="command-line-options.html#green-primary">-green-primary <var>point</var></a></td> 661 <td>chromaticity green primary point</td> 662 </tr> 663 664 <tr> 665 <td><a href="command-line-options.html#help">-help</a></td> 666 <td>print program options</td> 667 </tr> 668 669 <tr> 670 <td><a href="command-line-options.html#hough-lines">-hough-lines <var>geometry</var></a></td> 671 <td>identify lines in the image</td> 672 </tr> 673 674 <tr> 675 <td><a href="command-line-options.html#identify">-identify</a></td> 676 <td>identify the format and characteristics of the image</td> 677 </tr> 678 679 <tr> 680 <td><a href="command-line-options.html#ift">-ift</a></td> 681 <td>implements the inverse discrete Fourier transform (DFT)</td> 682 </tr> 683 684 <tr> 685 <td><a href="command-line-options.html#implode">-implode <var>amount</var></a></td> 686 <td>implode image pixels about the center</td> 687 </tr> 688 689 <tr> 690 <td><a href="command-line-options.html#insert">-insert <var>index</var></a></td> 691 <td>insert last image into the image sequence</td> 692 </tr> 693 694 <tr> 695 <td><a href="command-line-options.html#intensity">-intensity <var>method</var></a></td> 696 <td>method to generate an intensity value from a pixel</td> 697 </tr> 698 699 <tr> 700 <td><a href="command-line-options.html#intent">-intent <var>type</var></a></td> 701 <td>type of rendering intent when managing the image color</td> 702 </tr> 703 704 <tr> 705 <td><a href="command-line-options.html#interlace">-interlace <var>type</var></a></td> 706 <td>type of image interlacing scheme</td> 707 </tr> 708 709 <tr> 710 <td><a href="command-line-options.html#interline-spacing">-interline-spacing <var>value</var></a></td> 711 <td>the space between two text lines</td> 712 </tr> 713 714 <tr> 715 <td><a href="command-line-options.html#interpolate">-interpolate <var>method</var></a></td> 716 <td>pixel color interpolation method</td> 717 </tr> 718 719 <tr> 720 <td><a href="command-line-options.html#interword-spacing">-interword-spacing <var>value</var></a></td> 721 <td>the space between two words</td> 722 </tr> 723 724 <tr> 725 <td><a href="command-line-options.html#kerning">-kerning <var>value</var></a></td> 726 <td>the space between two characters</td> 727 </tr> 728 729 <tr> 730 <td><a href="command-line-options.html#colors">-kmeans <var>geometry</var></a></td> 731 <td>K means color reduction</td> 732 </tr> 733 734 <tr> 735 <td><a href="command-line-options.html#kuwahara">-kuwahara <var>geometry</var></a></td> 736 <td>edge preserving noise reduction filter</td> 737 </tr> 738 739 <tr> 740 <td><a href="command-line-options.html#label">-label <var>string</var></a></td> 741 <td>assign a label to an image</td> 742 </tr> 743 744 <tr> 745 <td><a href="command-line-options.html#lat">-lat <var>geometry</var></a></td> 746 <td>local adaptive thresholding</td> 747 </tr> 748 749 <tr> 750 <td><a href="command-line-options.html#layers">-layers <var>method</var></a></td> 751 <td>optimize or compare image layers</td> 752 </tr> 753 754 <tr> 755 <td><a href="command-line-options.html#level">-level <var>value</var></a></td> 756 <td>adjust the level of image contrast</td> 757 </tr> 758 759 <tr> 760 <td><a href="command-line-options.html#limit">-limit <var>type value</var></a></td> 761 <td>pixel cache resource limit</td> 762 </tr> 763 764 <tr> 765 <td><a href="command-line-options.html#linear-stretch">-linear-stretch <var>geometry</var></a></td> 766 <td>linear with saturation histogram stretch</td> 767 </tr> 768 769 <tr> 770 <td><a href="command-line-options.html#liquid-rescale">-liquid-rescale <var>geometry</var></a></td> 771 <td>rescale image with seam-carving</td> 772 </tr> 773 774 <tr> 775 <td><a href="command-line-options.html#list">-list <var>type</var></a></td> 776 <td>Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td> 777 </tr> 778 779 <tr> 780 <td><a href="command-line-options.html#log">-log <var>format</var></a></td> 781 <td>format of debugging information</td> 782 </tr> 783 784 <tr> 785 <td><a href="command-line-options.html#loop">-loop <var>iterations</var></a></td> 786 <td>add Netscape loop extension to your GIF animation</td> 787 </tr> 788 789 <tr> 790 <td><a href="command-line-options.html#mattecolor">-mattecolor <var>color</var></a></td> 791 <td>frame color</td> 792 </tr> 793 794 <tr> 795 <td><a href="command-line-options.html#median">-median <var>radius</var></a></td> 796 <td>apply a median filter to the image</td> 797 </tr> 798 799 <tr> 800 <td><a href="command-line-options.html#mean-shift">-mean-shift <var>geometry</var></a></td> 801 <td>delineate arbitrarily shaped clusters in the image</td> 802 </tr> 803 804 <tr> 805 <td><a href="command-line-options.html#metric">-metric <var>type</var></a></td> 806 <td>measure differences between images with this metric</td> 807 </tr> 808 809 <tr> 810 <td><a href="command-line-options.html#mode">-mode <var>radius</var></a></td> 811 <td>make each pixel the 'predominant color' of the neighborhood</td> 812 </tr> 813 814 <tr> 815 <td><a href="command-line-options.html#modulate">-modulate <var>value</var></a></td> 816 <td>vary the brightness, saturation, and hue</td> 817 </tr> 818 819 <tr> 820 <td><a href="command-line-options.html#moments">-moments</a></td> 821 <td>display image moments.</td> 822 </tr> 823 824 <tr> 825 <td><a href="command-line-options.html#monitor">-monitor</a></td> 826 <td>monitor progress</td> 827 </tr> 828 829 <tr> 830 <td><a href="command-line-options.html#monochrome">-monochrome</a></td> 831 <td>transform image to black and white</td> 832 </tr> 833 834 <tr> 835 <td><a href="command-line-options.html#morph">-morph <var>value</var></a></td> 836 <td>morph an image sequence</td> 837 </tr> 838 839 <tr> 840 <td><a href="command-line-options.html#morphology">-morphology <var>method</var></a> <var>kernel</var></td> 841 <td>apply a morphology method to the image</td> 842 </tr> 843 844 <tr> 845 <td><a href="command-line-options.html#motion-blur">-motion-blur <var>geometry</var></a></td> 846 <td>simulate motion blur</td> 847 </tr> 848 849 <tr> 850 <td><a href="command-line-options.html#negate">-negate</a></td> 851 <td>replace each pixel with its complementary color </td> 852 </tr> 853 854 <tr> 855 <td><a href="command-line-options.html#noise">-noise <var>radius</var></a></td> 856 <td>add or reduce noise in an image</td> 857 </tr> 858 859 <tr> 860 <td><a href="command-line-options.html#normalize">-normalize</a></td> 861 <td>transform image to span the full range of colors</td> 862 </tr> 863 864 <tr> 865 <td><a href="command-line-options.html#opaque">-opaque <var>color</var></a></td> 866 <td>change this color to the fill color</td> 867 </tr> 868 869 <tr> 870 <td><a href="command-line-options.html#ordered-dither">-ordered-dither <var>NxN</var></a></td> 871 <td>ordered dither the image</td> 872 </tr> 873 874 <tr> 875 <td><a href="command-line-options.html#orient">-orient <var>type</var></a></td> 876 <td>image orientation</td> 877 </tr> 878 879 <tr> 880 <td><a href="command-line-options.html#page">-page <var>geometry</var></a></td> 881 <td>size and location of an image canvas (setting)</td> 882 </tr> 883 884 <tr> 885 <td><a href="command-line-options.html#paint">-paint <var>radius</var></a></td> 886 <td>simulate an oil painting</td> 887 </tr> 888 889 <tr> 890 <td><a href="command-line-options.html#perceptible">-perceptible</a></td> 891 <td>set each pixel whose value is less than |<var>epsilon</var>| to <var>-epsilon</var> or <var>epsilon</var> (whichever is closer) otherwise the pixel value remains unchanged.</td> 892 </tr> 893 894 <tr> 895 <td><a href="command-line-options.html#ping">-ping</a></td> 896 <td>efficiently determine image attributes</td> 897 </tr> 898 899 <tr> 900 <td><a href="command-line-options.html#pointsize">-pointsize <var>value</var></a></td> 901 <td>font point size</td> 902 </tr> 903 904 <tr> 905 <td><a href="command-line-options.html#polaroid">-polaroid <var>angle</var></a></td> 906 <td>simulate a Polaroid picture</td> 907 </tr> 908 909 <tr> 910 <td><a href="command-line-options.html#poly">-poly <var>terms</var></a></td> 911 <td>build a polynomial from the image sequence and the corresponding terms (coefficients and degree pairs).</td> 912 </tr> 913 914 <tr> 915 <td><a href="command-line-options.html#posterize">-posterize <var>levels</var></a></td> 916 <td>reduce the image to a limited number of color levels</td> 917 </tr> 918 919 <tr> 920 <td><a href="command-line-options.html#precision">-precision <var>value</var></a></td> 921 <td>set the maximum number of significant digits to be printed</td> 922 </tr> 923 924 <tr> 925 <td><a href="command-line-options.html#preview">-preview <var>type</var></a></td> 926 <td>image preview type</td> 927 </tr> 928 929 <tr> 930 <td><a href="command-line-options.html#print">-print <var>string</var></a></td> 931 <td>interpret string and print to console</td> 932 </tr> 933 934 <tr> 935 <td><a href="command-line-options.html#process">-process <var>image-filter</var></a></td> 936 <td>process the image with a custom image filter</td> 937 </tr> 938 939 <tr> 940 <td><a href="command-line-options.html#profile">-profile <var>filename</var></a></td> 941 <td>add, delete, or apply an image profile</td> 942 </tr> 943 944 <tr> 945 <td><a href="command-line-options.html#quality">-quality <var>value</var></a></td> 946 <td>JPEG/MIFF/PNG compression level</td> 947 </tr> 948 949 <tr> 950 <td><a href="command-line-options.html#quantize">-quantize <var>colorspace</var></a></td> 951 <td>reduce image colors in this colorspace</td> 952 </tr> 953 954 <tr> 955 <td><a href="command-line-options.html#quiet">-quiet</a></td> 956 <td>suppress all warning messages</td> 957 </tr> 958 959 <tr> 960 <td><a href="command-line-options.html#radial-blur">-radial-blur <var>angle</var></a></td> 961 <td>radial blur the image</td> 962 </tr> 963 964 <tr> 965 <td><a href="command-line-options.html#raise">-raise <var>value</var></a></td> 966 <td>lighten/darken image edges to create a 3-D effect</td> 967 </tr> 968 969 <tr> 970 <td><a href="command-line-options.html#random-threshold">-random-threshold <var>low, high</var></a></td> 971 <td>random threshold the image</td> 972 </tr> 973 974 <tr> 975 <td><a href="command-line-options.html#range-threshold">-range-threshold <var>low-black, low-white, high-white, high-black</var></a></td> 976 <td>perform either hard or soft thresholding within some range of values in an image</td> 977 </tr> 978 979 <tr> 980 <td><a href="command-line-options.html#read-mask">-read-mask <var>filename</var></a></td> 981 <td>associate a read mask with the image</td> 982 </tr> 983 984 <tr> 985 <td><a href="command-line-options.html#red-primary">-red-primary <var>point</var></a></td> 986 <td>chromaticity red primary point</td> 987 </tr> 988 989 <tr> 990 <td><a href="command-line-options.html#regard-warnings">-regard-warnings</a></td> 991 <td>pay attention to warning messages.</td> 992 </tr> 993 994 <tr> 995 <td><a href="command-line-options.html#region">-region <var>geometry</var></a></td> 996 <td>apply options to a portion of the image</td> 997 </tr> 998 999 <tr> 1000 <td><a href="command-line-options.html#remap">-remap <var>filename</var></a></td> 1001 <td>transform image colors to match this set of colors</td> 1002 </tr> 1003 1004 <tr> 1005 <td><a href="command-line-options.html#render">-render</a></td> 1006 <td>render vector graphics</td> 1007 </tr> 1008 1009 <tr> 1010 <td><a href="command-line-options.html#repage">-repage <var>geometry</var></a></td> 1011 <td>size and location of an image canvas</td> 1012 </tr> 1013 1014 <tr> 1015 <td><a href="command-line-options.html#resample">-resample <var>geometry</var></a></td> 1016 <td>change the resolution of an image</td> 1017 </tr> 1018 1019 <tr> 1020 <td><a href="command-line-options.html#resize">-resize <var>geometry</var></a></td> 1021 <td>resize the image</td> 1022 </tr> 1023 1024 <tr> 1025 <td><a href="command-line-options.html#respect-parentheses">-respect-parentheses</a></td> 1026 <td>settings remain in effect until parenthesis boundary.</td> 1027 </tr> 1028 1029 <tr> 1030 <td><a href="command-line-options.html#roll">-roll <var>geometry</var></a></td> 1031 <td>roll an image vertically or horizontally</td> 1032 </tr> 1033 1034 <tr> 1035 <td><a href="command-line-options.html#rotate">-rotate <var>degrees</var></a></td> 1036 <td>apply Paeth rotation to the image</td> 1037 </tr> 1038 1039 <tr> 1040 <td><a href="command-line-options.html#sample">-sample <var>geometry</var></a></td> 1041 <td>scale image with pixel sampling</td> 1042 </tr> 1043 1044 <tr> 1045 <td><a href="command-line-options.html#sampling-factor">-sampling-factor <var>geometry</var></a></td> 1046 <td>horizontal and vertical sampling factor</td> 1047 </tr> 1048 1049 <tr> 1050 <td><a href="command-line-options.html#scale">-scale <var>geometry</var></a></td> 1051 <td>scale the image</td> 1052 </tr> 1053 1054 <tr> 1055 <td><a href="command-line-options.html#scene">-scene <var>value</var></a></td> 1056 <td>image scene number</td> 1057 </tr> 1058 1059 <tr> 1060 <td><a href="command-line-options.html#seed">-seed <var>value</var></a></td> 1061 <td>seed a new sequence of pseudo-random numbers</td> 1062 </tr> 1063 1064 <tr> 1065 <td><a href="command-line-options.html#segment">-segment <var>values</var></a></td> 1066 <td>segment an image</td> 1067 </tr> 1068 1069 <tr> 1070 <td><a href="command-line-options.html#threshold">-selective-blur <var>geometry</var></a></td> 1071 <td>selectively blur pixels within a contrast threshold</td> 1072 </tr> 1073 1074 <tr> 1075 <td><a href="command-line-options.html#separate">-separate</a></td> 1076 <td>separate an image channel into a grayscale image</td> 1077 </tr> 1078 1079 <tr> 1080 <td><a href="command-line-options.html#sepia-tone">-sepia-tone <var>threshold</var></a></td> 1081 <td>simulate a sepia-toned photo</td> 1082 </tr> 1083 1084 <tr> 1085 <td><a href="command-line-options.html#set">-set <var>attribute value</var></a></td> 1086 <td>set an image attribute</td> 1087 </tr> 1088 1089 <tr> 1090 <td><a href="command-line-options.html#shade">-shade <var>degrees</var></a></td> 1091 <td>shade the image using a distant light source</td> 1092 </tr> 1093 1094 <tr> 1095 <td><a href="command-line-options.html#shadow">-shadow <var>geometry</var></a></td> 1096 <td>simulate an image shadow</td> 1097 </tr> 1098 1099 <tr> 1100 <td><a href="command-line-options.html#sharpen">-sharpen <var>geometry</var></a></td> 1101 <td>sharpen the image</td> 1102 </tr> 1103 1104 <tr> 1105 <td><a href="command-line-options.html#shave">-shave <var>geometry</var></a></td> 1106 <td>shave pixels from the image edges</td> 1107 </tr> 1108 1109 <tr> 1110 <td><a href="command-line-options.html#shear">-shear <var>geometry</var></a></td> 1111 <td>slide one edge of the image along the X or Y axis</td> 1112 </tr> 1113 1114 <tr> 1115 <td><a href="command-line-options.html#sigmoidal">-sigmoidal-contrast <var>geometry</var></a></td> 1116 <td>increase the contrast without saturating highlights or shadows</td> 1117 </tr> 1118 1119 <tr> 1120 <td><a href="command-line-options.html#smush">-smush <var>offset</var></a></td> 1121 <td>smush an image sequence together</td> 1122 </tr> 1123 1124 <tr> 1125 <td><a href="command-line-options.html#size">-size <var>geometry</var></a></td> 1126 <td>width and height of image</td> 1127 </tr> 1128 1129 <tr> 1130 <td><a href="command-line-options.html#sketch">-sketch <var>geometry</var></a></td> 1131 <td>simulate a pencil sketch</td> 1132 </tr> 1133 1134 <tr> 1135 <td><a href="command-line-options.html#solarize">-solarize <var>threshold</var></a></td> 1136 <td>negate all pixels above the threshold level</td> 1137 </tr> 1138 1139 <tr> 1140 <td><a href="command-line-options.html#splice">-splice <var>geometry</var></a></td> 1141 <td>splice the background color into the image</td> 1142 </tr> 1143 1144 <tr> 1145 <td><a href="command-line-options.html#spread">-spread <var>radius</var></a></td> 1146 <td>displace image pixels by a random amount</td> 1147 </tr> 1148 1149 <tr> 1150 <td><a href="command-line-options.html#statistic">-statistic <var>type</var> <var>geometry</var></a></td> 1151 <td>replace each pixel with corresponding statistic from the neighborhood</td> 1152 </tr> 1153 1154 <tr> 1155 <td><a href="command-line-options.html#strip">-strip</a></td> 1156 <td>strip image of all profiles and comments</td> 1157 </tr> 1158 1159 <tr> 1160 <td><a href="command-line-options.html#stroke">-stroke <var>color</var></a></td> 1161 <td>graphic primitive stroke color</td> 1162 </tr> 1163 1164 <tr> 1165 <td><a href="command-line-options.html#strokewidth">-strokewidth <var>value</var></a></td> 1166 <td>graphic primitive stroke width</td> 1167 </tr> 1168 1169 <tr> 1170 <td><a href="command-line-options.html#stretch">-stretch <var>type</var></a></td> 1171 <td>render text with this font stretch</td> 1172 </tr> 1173 1174 <tr> 1175 <td><a href="command-line-options.html#style">-style <var>type</var></a></td> 1176 <td>render text with this font style</td> 1177 </tr> 1178 1179 <tr> 1180 <td><a href="command-line-options.html#swap">-swap <var>indexes</var></a></td> 1181 <td>swap two images in the image sequence</td> 1182 </tr> 1183 1184 <tr> 1185 <td><a href="command-line-options.html#swirl">-swirl <var>degrees</var></a></td> 1186 <td>swirl image pixels about the center</td> 1187 </tr> 1188 1189 <tr> 1190 <td><a href="command-line-options.html#synchronize">-synchronize</a></td> 1191 <td>synchronize image to storage device</td> 1192 </tr> 1193 1194 <tr> 1195 <td><a href="command-line-options.html#taint">-taint</a></td> 1196 <td>mark the image as modified</td> 1197 </tr> 1198 1199 <tr> 1200 <td><a href="command-line-options.html#texture">-texture <var>filename</var></a></td> 1201 <td>name of texture to tile onto the image background</td> 1202 </tr> 1203 1204 <tr> 1205 <td><a href="command-line-options.html#threshold">-threshold <var>value</var></a></td> 1206 <td>threshold the image</td> 1207 </tr> 1208 1209 <tr> 1210 <td><a href="command-line-options.html#thumbnail">-thumbnail <var>geometry</var></a></td> 1211 <td>create a thumbnail of the image</td> 1212 </tr> 1213 1214 <tr> 1215 <td><a href="command-line-options.html#tile">-tile <var>filename</var></a></td> 1216 <td>tile image when filling a graphic primitive</td> 1217 </tr> 1218 1219 <tr> 1220 <td><a href="command-line-options.html#tile-offset">-tile-offset <var>geometry</var></a></td> 1221 <td>set the image tile offset</td> 1222 </tr> 1223 1224 <tr> 1225 <td><a href="command-line-options.html#tint">-tint <var>value</var></a></td> 1226 <td>tint the image with the fill color</td> 1227 </tr> 1228 1229 <tr> 1230 <td><a href="command-line-options.html#transform">-transform</a></td> 1231 <td>affine transform image</td> 1232 </tr> 1233 1234 <tr> 1235 <td><a href="command-line-options.html#transparent">-transparent <var>color</var></a></td> 1236 <td>make this color transparent within the image</td> 1237 </tr> 1238 1239 <tr> 1240 <td><a href="command-line-options.html#transparent-color">-transparent-color <var>color</var></a></td> 1241 <td>transparent color</td> 1242 </tr> 1243 1244 <tr> 1245 <td><a href="command-line-options.html#transpose">-transpose</a></td> 1246 <td>flip image in the vertical direction and rotate 90 degrees</td> 1247 </tr> 1248 1249 <tr> 1250 <td><a href="command-line-options.html#transverse">-transverse</a></td> 1251 <td>flop image in the horizontal direction and rotate 270 degrees</td> 1252 </tr> 1253 1254 <tr> 1255 <td><a href="command-line-options.html#treedepth">-treedepth <var>value</var></a></td> 1256 <td>color tree depth</td> 1257 </tr> 1258 1259 <tr> 1260 <td><a href="command-line-options.html#trim">-trim</a></td> 1261 <td>trim image edges</td> 1262 </tr> 1263 1264 <tr> 1265 <td><a href="command-line-options.html#type">-type <var>type</var></a></td> 1266 <td>image type</td> 1267 </tr> 1268 1269 <tr> 1270 <td><a href="command-line-options.html#undercolor">-undercolor <var>color</var></a></td> 1271 <td>annotation bounding box color</td> 1272 </tr> 1273 1274 <tr> 1275 <td><a href="command-line-options.html#unique-colors">-unique-colors</a></td> 1276 <td>discard all but one of any pixel color.</td> 1277 </tr> 1278 1279 <tr> 1280 <td><a href="command-line-options.html#units">-units <var>type</var></a></td> 1281 <td>the units of image resolution</td> 1282 </tr> 1283 1284 <tr> 1285 <td><a href="command-line-options.html#unsharp">-unsharp <var>geometry</var></a></td> 1286 <td>sharpen the image</td> 1287 </tr> 1288 1289 <tr> 1290 <td><a href="command-line-options.html#verbose">-verbose</a></td> 1291 <td>print detailed information about the image</td> 1292 </tr> 1293 1294 <tr> 1295 <td><a href="command-line-options.html#version">-version</a></td> 1296 <td>print version information</td> 1297 </tr> 1298 1299 <tr> 1300 <td><a href="command-line-options.html#view">-view</a></td> 1301 <td>FlashPix viewing transforms</td> 1302 </tr> 1303 1304 <tr> 1305 <td><a href="command-line-options.html#vignette">-vignette <var>geometry</var></a></td> 1306 <td>soften the edges of the image in vignette style</td> 1307 </tr> 1308 1309 <tr> 1310 <td><a href="command-line-options.html#virtual-pixel">-virtual-pixel <var>method</var></a></td> 1311 <td>access method for pixels outside the boundaries of the image</td> 1312 </tr> 1313 1314 <tr> 1315 <td><a href="command-line-options.html#wave">-wave <var>geometry</var></a></td> 1316 <td>alter an image along a sine wave</td> 1317 </tr> 1318 1319 <tr> 1320 <td><a href="command-line-options.html#wavelet">-wavelet-denoise <var>threshold</var></a></td> 1321 <td>removes noise from the image using a wavelet transform</td> 1322 </tr> 1323 1324 <tr> 1325 <td><a href="command-line-options.html#weight">-weight <var>type</var></a></td> 1326 <td>render text with this font weight</td> 1327 </tr> 1328 1329 <tr> 1330 <td><a href="command-line-options.html#white-point">-white-point <var>point</var></a></td> 1331 <td>chromaticity white point</td> 1332 </tr> 1333 1334 <tr> 1335 <td><a href="command-line-options.html#white-threshold">-white-threshold <var>value</var></a></td> 1336 <td>force all pixels above the threshold into white</td> 1337 </tr> 1338 1339 <tr> 1340 <td><a href="command-line-options.html#write">-write <var>filename</var></a></td> 1341 <td>write images to this file</td> 1342 </tr> 1343 1344 <tr> 1345 <td><a href="command-line-options.html#write-mask">-write-mask <var>filename</var></a></td> 1346 <td>associate a write mask with the image</td> 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