1 2 3 4 5 <!DOCTYPE html> 6 <html lang="en"> 7 <head> 8 <title>ImageMagick: Command-line Tools: Convert</title> 9 <meta charset="utf-8" /> 10 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 11 <meta name="viewport" content="width=device-width, initial-scale=1" /> 12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 13 <meta name="application-name" content="ImageMagick"/> 14 <meta name="description" content="ImageMagick is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. 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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> 60 61 <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> 62 63 <pre> 64 convert rose.jpg rose.png 65 </pre> 66 67 <p>Next, we reduce the image size before it is written to the PNG format:</p> 68 69 <pre> 70 convert rose.jpg -resize 50% rose.png 71 </pre> 72 73 <ul> 74 <a href="../images/rose.jpg"> 75 <img src="../images/rose.jpg" width="70" height="46" alt="rose" /> 76 </a> 77 <img style="margin-top:13px; margin-bottom:13px;" src="../images/right.gif" width="20" height="20" alt="==>" /> 78 <a href="../images/rose.png"> 79 <img style="margin-top:11px; margin-bottom:12px;" src="../images/rose.png" width="35" height="23" alt="rose" /> 80 </a> 81 </ul> 82 83 <p>You can combine multiple image-processing operations to produce complex results:</p> 84 85 <pre> 86 convert -size 320x85 canvas:none -font Bookman-DemiItalic -pointsize 72 \ 87 -draw "text 25,60 \'Magick\'" -channel RGBA -blur 0x6 -fill darkred -stroke magenta \ 88 -draw "text 20,55 \'Magick\'" fuzzy-magick.png 89 </pre> 90 91 <ul> 92 <a href="../images/fuzzy-magick.png"><img src="../images/fuzzy-magick.png" width="320" height="85" alt="fuzzy-magick" /></a> 93 </ul> 94 95 <p>or here we resize an image with improved quality:</p> 96 97 <pre> 98 convert input.png -colorspace RGB +sigmoidal-contrast 11.6933 \ 99 -define filter:filter=Sinc -define filter:window=Jinc -define filter:lobes=3 \ 100 -resize 400% -sigmoidal-contrast 11.6933 -colorspace sRGB output.png'); 101 </pre> 102 103 <p>You can find additional examples of using <code>convert</code> in <a href="http://www.imagemagick.org/Usage/">Examples of ImageMagick Usage</a>.</p> 104 105 <h2 class="magick-header"><a id="options"></a>Option Summary</h2> 106 107 <p>The <code>convert</code> command recognizes these options. Click on an option to get more details about how that option works.</p> 108 109 <div class="table-responsive"> 110 <table class="table table-condensed table-striped"> 111 <tr> 112 <td><a href="command-line-options.html#adaptive-blur">-adaptive-blur <var>geometry</var></a></td> 113 <td>adaptively blur pixels; decrease effect near edges</td> 114 </tr> 115 116 <tr> 117 <td><a href="command-line-options.html#adaptive-resize">-adaptive-resize <var>geometry</var></a></td> 118 <td>adaptively resize image with data dependent triangulation.</td> 119 </tr> 120 121 <tr> 122 <td><a href="command-line-options.html#adaptive-sharpen">-adaptive-sharpen <var>geometry</var></a></td> 123 <td>adaptively sharpen pixels; increase effect near edges</td> 124 </tr> 125 126 <tr> 127 <td><a href="command-line-options.html#adjoin">-adjoin</a></td> 128 <td>join images into a single multi-image file</td> 129 </tr> 130 131 <tr> 132 <td><a href="command-line-options.html#affine">-affine <var>matrix</var></a></td> 133 <td>affine transform matrix</td> 134 </tr> 135 136 <tr> 137 <td><a href="command-line-options.html#alpha">-alpha</a></td> 138 <td>on, activate, off, deactivate, set, opaque, copy", 139 transparent, extract, background, or shape the alpha channel</td> 140 </tr> 141 142 <tr> 143 <td><a href="command-line-options.html#annotate">-annotate <var>geometry text</var></a></td> 144 <td>annotate the image with text</td> 145 </tr> 146 147 <tr> 148 <td><a href="command-line-options.html#antialias">-antialias</a></td> 149 <td>remove pixel-aliasing</td> 150 </tr> 151 152 <tr> 153 <td><a href="command-line-options.html#append">-append</a></td> 154 <td>append an image sequence</td> 155 </tr> 156 157 <tr> 158 <td><a href="command-line-options.html#authenticate">-authenticate <var>value</var></a></td> 159 <td>decipher image with this password</td> 160 </tr> 161 162 <tr> 163 <td><a href="command-line-options.html#auto-gamma">-auto-gamma</a></td> 164 <td>automagically adjust gamma level of image</td> 165 </tr> 166 167 <tr> 168 <td><a href="command-line-options.html#auto-level">-auto-level</a></td> 169 <td>automagically adjust color levels of image</td> 170 </tr> 171 172 <tr> 173 <td><a href="command-line-options.html#auto-orient">-auto-orient</a></td> 174 <td>automagically orient image</td> 175 </tr> 176 177 <tr> 178 <td><a href="command-line-options.html#background">-background <var>color</var></a></td> 179 <td>background color</td> 180 </tr> 181 182 <tr> 183 <td><a href="command-line-options.html#bench">-bench <var>iterations</var></a></td> 184 <td>measure performance</td> 185 </tr> 186 187 <tr> 188 <td><a href="command-line-options.html#bias">-bias <var>value</var></a></td> 189 <td>add bias when convolving an image</td> 190 </tr> 191 192 <tr> 193 <td><a href="command-line-options.html#black-threshold">-black-threshold <var>value</var></a></td> 194 <td>force all pixels below the threshold into black</td> 195 </tr> 196 197 <tr> 198 <td><a href="command-line-options.html#blue-primary">-blue-primary <var>point</var></a></td> 199 <td>chromaticity blue primary point</td> 200 </tr> 201 202 <tr> 203 <td><a href="command-line-options.html#blue-shift">-blue-shift <var>factor</var></a></td> 204 <td>simulate a scene at nighttime in the moonlight</td> 205 </tr> 206 207 <tr> 208 <td><a href="command-line-options.html#blur">-blur <var>geometry</var></a></td> 209 <td>reduce image noise and reduce detail levels</td> 210 </tr> 211 212 <tr> 213 <td><a href="command-line-options.html#border">-border <var>geometry</var></a></td> 214 <td>surround image with a border of color</td> 215 </tr> 216 217 <tr> 218 <td><a href="command-line-options.html#bordercolor">-bordercolor <var>color</var></a></td> 219 <td>border color</td> 220 </tr> 221 222 <tr> 223 <td><a href="command-line-options.html#brightness-contrast">-brightness-contrast <var>geometry</var></a></td> 224 <td>improve brightness / contrast of the image</td> 225 </tr> 226 227 <tr> 228 <td><a href="command-line-options.html#canny">-canny <var>geometry</var></a></td> 229 <td>use a multi-stage algorithm to detect a wide range of edges in the image</td> 230 </tr> 231 232 <tr> 233 <td><a href="command-line-options.html#caption">-caption <var>string</var></a></td> 234 <td>assign a caption to an image</td> 235 </tr> 236 237 <tr> 238 <td><a href="command-line-options.html#cdl">-cdl <var>filename</var></a></td> 239 <td>color correct with a color decision list</td> 240 </tr> 241 242 <tr> 243 <td><a href="command-line-options.html#channel">-channel <var>type</var></a></td> 244 <td>apply option to select image channels</td> 245 </tr> 246 247 <tr> 248 <td><a href="command-line-options.html#charcoal">-charcoal <var>radius</var></a></td> 249 <td>simulate a charcoal drawing</td> 250 </tr> 251 252 <tr> 253 <td><a href="command-line-options.html#chop">-chop <var>geometry</var></a></td> 254 <td>remove pixels from the image interior</td> 255 </tr> 256 257 <tr> 258 <td><a href="command-line-options.html#clamp">-clamp</a></td> 259 <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> 260 </tr> 261 262 <tr> 263 <td><a href="command-line-options.html#clip">-clip</a></td> 264 <td>clip along the first path from the 8BIM profile</td> 265 </tr> 266 267 <tr> 268 <td><a href="command-line-options.html#clip-mask">-clip-mask</a> <var>filename</var></td> 269 <td>associate clip mask with the image</td> 270 </tr> 271 272 <tr> 273 <td><a href="command-line-options.html#clip-path">-clip-path <var>id</var></a></td> 274 <td>clip along a named path from the 8BIM profile</td> 275 </tr> 276 277 <tr> 278 <td><a href="command-line-options.html#clone">-clone <var>index</var></a></td> 279 <td>clone an image</td> 280 </tr> 281 282 <tr> 283 <td><a href="command-line-options.html#clut">-clut</a></td> 284 <td>apply a color lookup table to the image</td> 285 </tr> 286 287 <tr> 288 <td><a href="command-line-options.html#connected-components">-connected-components <var>connectivity</var></a></td> 289 <td>connected-components uniquely labeled, choose from 4 or 8 way connectivity</td> 290 </tr> 291 292 <tr> 293 <td><a href="command-line-options.html#contrast-stretch">-contrast-stretch <var>geometry</var></a></td> 294 <td>improve the contrast in an image by `stretching' the range of intensity value</td> 295 </tr> 296 297 <tr> 298 <td><a href="command-line-options.html#coalesce">-coalesce</a></td> 299 <td>merge a sequence of images</td> 300 </tr> 301 302 <tr> 303 <td><a href="command-line-options.html#colorize">-colorize <var>value</var></a></td> 304 <td>colorize the image with the fill color</td> 305 </tr> 306 307 <tr> 308 <td><a href="command-line-options.html#color-matrix">-color-matrix <var>matrix</var></a></td> 309 <td>apply color correction to the image.</td> 310 </tr> 311 312 <tr> 313 <td><a href="command-line-options.html#colors">-colors <var>value</var></a></td> 314 <td>preferred number of colors in the image</td> 315 </tr> 316 317 <tr> 318 <td><a href="command-line-options.html#colorspace">-colorspace <var>type</var></a></td> 319 <td>set image colorspace</td> 320 </tr> 321 322 <tr> 323 <td><a href="command-line-options.html#combine">-combine</a></td> 324 <td>combine a sequence of images</td> 325 </tr> 326 327 <tr> 328 <td><a href="command-line-options.html#comment">-comment <var>string</var></a></td> 329 <td>annotate image with comment</td> 330 </tr> 331 332 <tr> 333 <td><a href="command-line-options.html#compare">-compare</a></td> 334 <td>compare image</td> 335 </tr> 336 337 <tr> 338 <td><a href="command-line-options.html#complex">-complex<var>operator</var></a></td> 339 <td>perform complex mathematics on an image sequence</td> 340 </tr> 341 342 <tr> 343 <td><a href="command-line-options.html#compose">-compose <var>operator</var></a></td> 344 <td>set image composite operator</td> 345 </tr> 346 347 <tr> 348 <td><a href="command-line-options.html#composite">-composite</a></td> 349 <td>composite image</td> 350 </tr> 351 352 <tr> 353 <td><a href="command-line-options.html#compress">-compress <var>type</var></a></td> 354 <td>image compression type</td> 355 </tr> 356 357 <tr> 358 <td><a href="command-line-options.html#contrast">-contrast</a></td> 359 <td>enhance or reduce the image contrast</td> 360 </tr> 361 362 <tr> 363 <td><a href="command-line-options.html#convolve">-convolve <var>coefficients</var></a></td> 364 <td>apply a convolution kernel to the image</td> 365 </tr> 366 367 <tr> 368 <td><a href="command-line-options.html#copy">-copy <var>geometry</var> <var>offset</var></a></td> 369 <td>copy pixels from one area of an image to another</td> 370 </tr> 371 372 <tr> 373 <td><a href="command-line-options.html#crop">-crop <var>geometry</var></a></td> 374 <td>crop the image</td> 375 </tr> 376 377 <tr> 378 <td><a href="command-line-options.html#cycle">-cycle <var>amount</var></a></td> 379 <td>cycle the image colormap</td> 380 </tr> 381 382 <tr> 383 <td><a href="command-line-options.html#decipher">-decipher <var>filename</var></a></td> 384 <td>convert cipher pixels to plain</td> 385 </tr> 386 387 <tr> 388 <td><a href="command-line-options.html#debug">-debug <var>events</var></a></td> 389 <td>display copious debugging information</td> 390 </tr> 391 392 <tr> 393 <td><a href="command-line-options.html#define">-define <var>format:option</var></a></td> 394 <td>define one or more image format options</td> 395 </tr> 396 397 <tr> 398 <td><a href="command-line-options.html#deconstruct">-deconstruct</a></td> 399 <td>break down an image sequence into constituent parts</td> 400 </tr> 401 402 <tr> 403 <td><a href="command-line-options.html#delay">-delay <var>value</var></a></td> 404 <td>display the next image after pausing</td> 405 </tr> 406 407 <tr> 408 <td><a href="command-line-options.html#delete">-delete <var>index</var></a></td> 409 <td>delete the image from the image sequence</td> 410 </tr> 411 412 <tr> 413 <td><a href="command-line-options.html#density">-density <var>geometry</var></a></td> 414 <td>horizontal and vertical density of the image</td> 415 </tr> 416 417 <tr> 418 <td><a href="command-line-options.html#depth">-depth <var>value</var></a></td> 419 <td>image depth</td> 420 </tr> 421 422 <tr> 423 <td><a href="command-line-options.html#despeckle">-despeckle</a></td> 424 <td>reduce the speckles within an image</td> 425 </tr> 426 427 <tr> 428 <td><a href="command-line-options.html#direction">-direction <var>type</var></a></td> 429 <td>render text right-to-left or left-to-right</td> 430 </tr> 431 432 <tr> 433 <td><a href="command-line-options.html#display">-display <var>server</var></a></td> 434 <td>get image or font from this X server</td> 435 </tr> 436 437 <tr> 438 <td><a href="command-line-options.html#dispose">-dispose <var>method</var></a></td> 439 <td>layer disposal method</td> 440 </tr> 441 442 <tr> 443 <td><a href="command-line-options.html#distribute-cache">-distribute-cache <var>port</var></a></td> 444 <td>launch a distributed pixel cache server</td> 445 </tr> 446 447 <tr> 448 <td><a href="command-line-options.html#distort">-distort <var>type coefficients</var></a></td> 449 <td>distort image</td> 450 </tr> 451 452 <tr> 453 <td><a href="command-line-options.html#dither">-dither <var>method</var></a></td> 454 <td>apply error diffusion to image</td> 455 </tr> 456 457 <tr> 458 <td><a href="command-line-options.html#draw">-draw <var>string</var></a></td> 459 <td>annotate the image with a graphic primitive</td> 460 </tr> 461 462 <tr> 463 <td><a href="command-line-options.html#duplicate">-duplicate <var>count,indexes</var></a></td> 464 <td>duplicate an image one or more times</td> 465 </tr> 466 467 <tr> 468 <td><a href="command-line-options.html#edge">-edge <var>radius</var></a></td> 469 <td>apply a filter to detect edges in the image</td> 470 </tr> 471 472 <tr> 473 <td><a href="command-line-options.html#emboss">-emboss <var>radius</var></a></td> 474 <td>emboss an image</td> 475 </tr> 476 477 <tr> 478 <td><a href="command-line-options.html#encipher">-encipher <var>filename</var></a></td> 479 <td>convert plain pixels to cipher pixels</td> 480 </tr> 481 482 <tr> 483 <td><a href="command-line-options.html#encoding">-encoding <var>type</var></a></td> 484 <td>text encoding type</td> 485 </tr> 486 487 <tr> 488 <td><a href="command-line-options.html#endian">-endian <var>type</var></a></td> 489 <td>endianness (MSB or LSB) of the image</td> 490 </tr> 491 492 <tr> 493 <td><a href="command-line-options.html#enhance">-enhance</a></td> 494 <td>apply a digital filter to enhance a noisy image</td> 495 </tr> 496 497 <tr> 498 <td><a href="command-line-options.html#equalize">-equalize</a></td> 499 <td>perform histogram equalization to an image</td> 500 </tr> 501 502 <tr> 503 <td><a href="command-line-options.html#evaluate">-evaluate <var>operator value</var></a></td> 504 <td>evaluate an arithmetic, relational, or logical expression</td> 505 </tr> 506 507 <tr> 508 <td><a href="command-line-options.html#evaluate-sequence">-evaluate-sequence <var>operator</var></a></td> 509 <td>evaluate an arithmetic, relational, or logical expression for an image sequence</td> 510 </tr> 511 512 <tr> 513 <td><a href="command-line-options.html#extent">-extent <var>geometry</var></a></td> 514 <td>set the image size</td> 515 </tr> 516 517 <tr> 518 <td><a href="command-line-options.html#extract">-extract <var>geometry</var></a></td> 519 <td>extract area from image</td> 520 </tr> 521 522 <tr> 523 <td><a href="command-line-options.html#family">-family <var>name</var></a></td> 524 <td>render text with this font family</td> 525 </tr> 526 527 <tr> 528 <td><a href="command-line-options.html#features">-features <var>distance</var></a></td> 529 <td>analyze image features (e.g. contract, correlations, etc.).</td> 530 </tr> 531 532 <tr> 533 <td><a href="command-line-options.html#fft">-fft</a></td> 534 <td>implements the discrete Fourier transform (DFT)</td> 535 </tr> 536 537 <tr> 538 <td><a href="command-line-options.html#fill">-fill <var>color</var></a></td> 539 <td>color to use when filling a graphic primitive</td> 540 </tr> 541 542 <tr> 543 <td><a href="command-line-options.html#filter">-filter <var>type</var></a></td> 544 <td>use this filter when resizing an image</td> 545 </tr> 546 547 <tr> 548 <td><a href="command-line-options.html#flatten">-flatten</a></td> 549 <td>flatten a sequence of images</td> 550 </tr> 551 552 <tr> 553 <td><a href="command-line-options.html#flip">-flip</a></td> 554 <td>flip image in the vertical direction</td> 555 </tr> 556 557 <tr> 558 <td><a href="command-line-options.html#floodfill">-floodfill <var>geometry color</var></a></td> 559 <td>floodfill the image with color</td> 560 </tr> 561 562 <tr> 563 <td><a href="command-line-options.html#flop">-flop</a></td> 564 <td>flop image in the horizontal direction</td> 565 </tr> 566 567 <tr> 568 <td><a href="command-line-options.html#font">-font <var>name</var></a></td> 569 <td>render text with this font</td> 570 </tr> 571 572 <tr> 573 <td><a href="command-line-options.html#format_identify_">-format <var>string</var></a></td> 574 <td>output formatted image characteristics</td> 575 </tr> 576 577 <tr> 578 <td><a href="command-line-options.html#frame">-frame <var>geometry</var></a></td> 579 <td>surround image with an ornamental border</td> 580 </tr> 581 582 <tr> 583 <td><a href="command-line-options.html#function">-function <var>name</var></a></td> 584 <td>apply a function to the image</td> 585 </tr> 586 587 <tr> 588 <td><a href="command-line-options.html#fuzz">-fuzz <var>distance</var></a></td> 589 <td>colors within this distance are considered equal</td> 590 </tr> 591 592 <tr> 593 <td><a href="command-line-options.html#fx">-fx <var>expression</var></a></td> 594 <td>apply mathematical expression to an image channel(s)</td> 595 </tr> 596 597 <tr> 598 <td><a href="command-line-options.html#gamma">-gamma <var>value</var></a></td> 599 <td>level of gamma correction</td> 600 </tr> 601 602 <tr> 603 <td><a href="command-line-options.html#gaussian-blur">-gaussian-blur <var>geometry</var></a></td> 604 <td>reduce image noise and reduce detail levels</td> 605 </tr> 606 607 <tr> 608 <td><a href="command-line-options.html#geometry">-geometry <var>geometry</var></a></td> 609 <td>preferred size or location of the image</td> 610 </tr> 611 612 <tr> 613 <td><a href="command-line-options.html#gravity">-gravity <var>type</var></a></td> 614 <td>horizontal and vertical text placement</td> 615 </tr> 616 617 <tr> 618 <td><a href="command-line-options.html#intensity">-grayscale <var>method</var></a></td> 619 <td>convert image to grayscale</td> 620 </tr> 621 622 <tr> 623 <td><a href="command-line-options.html#green-primary">-green-primary <var>point</var></a></td> 624 <td>chromaticity green primary point</td> 625 </tr> 626 627 <tr> 628 <td><a href="command-line-options.html#help">-help</a></td> 629 <td>print program options</td> 630 </tr> 631 632 <tr> 633 <td><a href="command-line-options.html#hough-lines">-hough-lines <var>geometry</var></a></td> 634 <td>identify lines in the image</td> 635 </tr> 636 637 <tr> 638 <td><a href="command-line-options.html#identify">-identify</a></td> 639 <td>identify the format and characteristics of the image</td> 640 </tr> 641 642 <tr> 643 <td><a href="command-line-options.html#ift">-ift</a></td> 644 <td>implements the inverse discrete Fourier transform (DFT)</td> 645 </tr> 646 647 <tr> 648 <td><a href="command-line-options.html#implode">-implode <var>amount</var></a></td> 649 <td>implode image pixels about the center</td> 650 </tr> 651 652 <tr> 653 <td><a href="command-line-options.html#insert">-insert <var>index</var></a></td> 654 <td>insert last image into the image sequence</td> 655 </tr> 656 657 <tr> 658 <td><a href="command-line-options.html#intensity">-intensity <var>method</var></a></td> 659 <td>method to generate an intensity value from a pixel</td> 660 </tr> 661 662 <tr> 663 <td><a href="command-line-options.html#intent">-intent <var>type</var></a></td> 664 <td>type of rendering intent when managing the image color</td> 665 </tr> 666 667 <tr> 668 <td><a href="command-line-options.html#interlace">-interlace <var>type</var></a></td> 669 <td>type of image interlacing scheme</td> 670 </tr> 671 672 <tr> 673 <td><a href="command-line-options.html#interline-spacing">-interline-spacing <var>value</var></a></td> 674 <td>the space between two text lines</td> 675 </tr> 676 677 <tr> 678 <td><a href="command-line-options.html#interpolate">-interpolate <var>method</var></a></td> 679 <td>pixel color interpolation method</td> 680 </tr> 681 682 <tr> 683 <td><a href="command-line-options.html#interword-spacing">-interword-spacing <var>value</var></a></td> 684 <td>the space between two words</td> 685 </tr> 686 687 <tr> 688 <td><a href="command-line-options.html#kerning">-kerning <var>value</var></a></td> 689 <td>the space between two characters</td> 690 </tr> 691 692 <tr> 693 <td><a href="command-line-options.html#kuwahara">-kuwahara <var>geometry</var></a></td> 694 <td>edge preserving noise reduction filter</td> 695 </tr> 696 697 <tr> 698 <td><a href="command-line-options.html#label">-label <var>string</var></a></td> 699 <td>assign a label to an image</td> 700 </tr> 701 702 <tr> 703 <td><a href="command-line-options.html#lat">-lat <var>geometry</var></a></td> 704 <td>local adaptive thresholding</td> 705 </tr> 706 707 <tr> 708 <td><a href="command-line-options.html#layers">-layers <var>method</var></a></td> 709 <td>optimize or compare image layers</td> 710 </tr> 711 712 <tr> 713 <td><a href="command-line-options.html#level">-level <var>value</var></a></td> 714 <td>adjust the level of image contrast</td> 715 </tr> 716 717 <tr> 718 <td><a href="command-line-options.html#limit">-limit <var>type value</var></a></td> 719 <td>pixel cache resource limit</td> 720 </tr> 721 722 <tr> 723 <td><a href="command-line-options.html#linear-stretch">-linear-stretch <var>geometry</var></a></td> 724 <td>linear with saturation histogram stretch</td> 725 </tr> 726 727 <tr> 728 <td><a href="command-line-options.html#liquid-rescale">-liquid-rescale <var>geometry</var></a></td> 729 <td>rescale image with seam-carving</td> 730 </tr> 731 732 <tr> 733 <td><a href="command-line-options.html#list">-list <var>type</var></a></td> 734 <td>Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td> 735 </tr> 736 737 <tr> 738 <td><a href="command-line-options.html#log">-log <var>format</var></a></td> 739 <td>format of debugging information</td> 740 </tr> 741 742 <tr> 743 <td><a href="command-line-options.html#loop">-loop <var>iterations</var></a></td> 744 <td>add Netscape loop extension to your GIF animation</td> 745 </tr> 746 747 <tr> 748 <td><a href="command-line-options.html#mask">-mask <var>filename</var></a></td> 749 <td>associate a mask with the image</td> 750 </tr> 751 752 <tr> 753 <td><a href="command-line-options.html#mattecolor">-mattecolor <var>color</var></a></td> 754 <td>frame color</td> 755 </tr> 756 757 <tr> 758 <td><a href="command-line-options.html#median">-median <var>radius</var></a></td> 759 <td>apply a median filter to the image</td> 760 </tr> 761 762 <tr> 763 <td><a href="command-line-options.html#mean-shift">-mean-shift <var>geometry</var></a></td> 764 <td>delineate arbitrarily shaped clusters in the image</td> 765 </tr> 766 767 <tr> 768 <td><a href="command-line-options.html#metric">-metric <var>type</var></a></td> 769 <td>measure differences between images with this metric</td> 770 </tr> 771 772 <tr> 773 <td><a href="command-line-options.html#mode">-mode <var>radius</var></a></td> 774 <td>make each pixel the 'predominant color' of the neighborhood</td> 775 </tr> 776 777 <tr> 778 <td><a href="command-line-options.html#modulate">-modulate <var>value</var></a></td> 779 <td>vary the brightness, saturation, and hue</td> 780 </tr> 781 782 <tr> 783 <td><a href="command-line-options.html#moments">-moments</a></td> 784 <td>display image moments.</td> 785 </tr> 786 787 <tr> 788 <td><a href="command-line-options.html#monitor">-monitor</a></td> 789 <td>monitor progress</td> 790 </tr> 791 792 <tr> 793 <td><a href="command-line-options.html#monochrome">-monochrome</a></td> 794 <td>transform image to black and white</td> 795 </tr> 796 797 <tr> 798 <td><a href="command-line-options.html#morph">-morph <var>value</var></a></td> 799 <td>morph an image sequence</td> 800 </tr> 801 802 <tr> 803 <td><a href="command-line-options.html#morphology">-morphology <var>method</var></a> <var>kernel</var></td> 804 <td>apply a morphology method to the image</td> 805 </tr> 806 807 <tr> 808 <td><a href="command-line-options.html#motion-blur">-motion-blur <var>geometry</var></a></td> 809 <td>simulate motion blur</td> 810 </tr> 811 812 <tr> 813 <td><a href="command-line-options.html#negate">-negate</a></td> 814 <td>replace each pixel with its complementary color </td> 815 </tr> 816 817 <tr> 818 <td><a href="command-line-options.html#noise">-noise <var>radius</var></a></td> 819 <td>add or reduce noise in an image</td> 820 </tr> 821 822 <tr> 823 <td><a href="command-line-options.html#normalize">-normalize</a></td> 824 <td>transform image to span the full range of colors</td> 825 </tr> 826 827 <tr> 828 <td><a href="command-line-options.html#opaque">-opaque <var>color</var></a></td> 829 <td>change this color to the fill color</td> 830 </tr> 831 832 <tr> 833 <td><a href="command-line-options.html#ordered-dither">-ordered-dither <var>NxN</var></a></td> 834 <td>ordered dither the image</td> 835 </tr> 836 837 <tr> 838 <td><a href="command-line-options.html#orient">-orient <var>type</var></a></td> 839 <td>image orientation</td> 840 </tr> 841 842 <tr> 843 <td><a href="command-line-options.html#page">-page <var>geometry</var></a></td> 844 <td>size and location of an image canvas (setting)</td> 845 </tr> 846 847 <tr> 848 <td><a href="command-line-options.html#paint">-paint <var>radius</var></a></td> 849 <td>simulate an oil painting</td> 850 </tr> 851 852 <tr> 853 <td><a href="command-line-options.html#perceptible">-perceptible</a></td> 854 <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> 855 </tr> 856 857 <tr> 858 <td><a href="command-line-options.html#ping">-ping</a></td> 859 <td>efficiently determine image attributes</td> 860 </tr> 861 862 <tr> 863 <td><a href="command-line-options.html#pointsize">-pointsize <var>value</var></a></td> 864 <td>font point size</td> 865 </tr> 866 867 <tr> 868 <td><a href="command-line-options.html#polaroid">-polaroid <var>angle</var></a></td> 869 <td>simulate a Polaroid picture</td> 870 </tr> 871 872 <tr> 873 <td><a href="command-line-options.html#poly">-poly <var>terms</var></a></td> 874 <td>build a polynomial from the image sequence and the corresponding terms (coefficients and degree pairs).</td> 875 </tr> 876 877 <tr> 878 <td><a href="command-line-options.html#posterize">-posterize <var>levels</var></a></td> 879 <td>reduce the image to a limited number of color levels</td> 880 </tr> 881 882 <tr> 883 <td><a href="command-line-options.html#precision">-precision <var>value</var></a></td> 884 <td>set the maximum number of significant digits to be printed</td> 885 </tr> 886 887 <tr> 888 <td><a href="command-line-options.html#preview">-preview <var>type</var></a></td> 889 <td>image preview type</td> 890 </tr> 891 892 <tr> 893 <td><a href="command-line-options.html#print">-print <var>string</var></a></td> 894 <td>interpret string and print to console</td> 895 </tr> 896 897 <tr> 898 <td><a href="command-line-options.html#process">-process <var>image-filter</var></a></td> 899 <td>process the image with a custom image filter</td> 900 </tr> 901 902 <tr> 903 <td><a href="command-line-options.html#profile">-profile <var>filename</var></a></td> 904 <td>add, delete, or apply an image profile</td> 905 </tr> 906 907 <tr> 908 <td><a href="command-line-options.html#quality">-quality <var>value</var></a></td> 909 <td>JPEG/MIFF/PNG compression level</td> 910 </tr> 911 912 <tr> 913 <td><a href="command-line-options.html#quantize">-quantize <var>colorspace</var></a></td> 914 <td>reduce image colors in this colorspace</td> 915 </tr> 916 917 <tr> 918 <td><a href="command-line-options.html#quiet">-quiet</a></td> 919 <td>suppress all warning messages</td> 920 </tr> 921 922 <tr> 923 <td><a href="command-line-options.html#radial-blur">-radial-blur <var>angle</var></a></td> 924 <td>radial blur the image</td> 925 </tr> 926 927 <tr> 928 <td><a href="command-line-options.html#raise">-raise <var>value</var></a></td> 929 <td>lighten/darken image edges to create a 3-D effect</td> 930 </tr> 931 932 <tr> 933 <td><a href="command-line-options.html#random-threshold">-random-threshold <var>low,high</var></a></td> 934 <td>random threshold the image</td> 935 </tr> 936 937 <tr> 938 <td><a href="command-line-options.html#red-primary">-red-primary <var>point</var></a></td> 939 <td>chromaticity red primary point</td> 940 </tr> 941 942 <tr> 943 <td><a href="command-line-options.html#regard-warnings">-regard-warnings</a></td> 944 <td>pay attention to warning messages.</td> 945 </tr> 946 947 <tr> 948 <td><a href="command-line-options.html#region">-region <var>geometry</var></a></td> 949 <td>apply options to a portion of the image</td> 950 </tr> 951 952 <tr> 953 <td><a href="command-line-options.html#remap">-remap <var>filename</var></a></td> 954 <td>transform image colors to match this set of colors</td> 955 </tr> 956 957 <tr> 958 <td><a href="command-line-options.html#render">-render</a></td> 959 <td>render vector graphics</td> 960 </tr> 961 962 <tr> 963 <td><a href="command-line-options.html#repage">-repage <var>geometry</var></a></td> 964 <td>size and location of an image canvas</td> 965 </tr> 966 967 <tr> 968 <td><a href="command-line-options.html#resample">-resample <var>geometry</var></a></td> 969 <td>change the resolution of an image</td> 970 </tr> 971 972 <tr> 973 <td><a href="command-line-options.html#resize">-resize <var>geometry</var></a></td> 974 <td>resize the image</td> 975 </tr> 976 977 <tr> 978 <td><a href="command-line-options.html#respect-parentheses">-respect-parentheses</a></td> 979 <td>settings remain in effect until parenthesis boundary.</td> 980 </tr> 981 982 <tr> 983 <td><a href="command-line-options.html#roll">-roll <var>geometry</var></a></td> 984 <td>roll an image vertically or horizontally</td> 985 </tr> 986 987 <tr> 988 <td><a href="command-line-options.html#rotate">-rotate <var>degrees</var></a></td> 989 <td>apply Paeth rotation to the image</td> 990 </tr> 991 992 <tr> 993 <td><a href="command-line-options.html#sample">-sample <var>geometry</var></a></td> 994 <td>scale image with pixel sampling</td> 995 </tr> 996 997 <tr> 998 <td><a href="command-line-options.html#sampling-factor">-sampling-factor <var>geometry</var></a></td> 999 <td>horizontal and vertical sampling factor</td> 1000 </tr> 1001 1002 <tr> 1003 <td><a href="command-line-options.html#scale">-scale <var>geometry</var></a></td> 1004 <td>scale the image</td> 1005 </tr> 1006 1007 <tr> 1008 <td><a href="command-line-options.html#scene">-scene <var>value</var></a></td> 1009 <td>image scene number</td> 1010 </tr> 1011 1012 <tr> 1013 <td><a href="command-line-options.html#seed">-seed <var>value</var></a></td> 1014 <td>seed a new sequence of pseudo-random numbers</td> 1015 </tr> 1016 1017 <tr> 1018 <td><a href="command-line-options.html#segment">-segment <var>values</var></a></td> 1019 <td>segment an image</td> 1020 </tr> 1021 1022 <tr> 1023 <td><a href="command-line-options.html#threshold">-selective-blur <var>geometry</var></a></td> 1024 <td>selectively blur pixels within a contrast threshold</td> 1025 </tr> 1026 1027 <tr> 1028 <td><a href="command-line-options.html#separate">-separate</a></td> 1029 <td>separate an image channel into a grayscale image</td> 1030 </tr> 1031 1032 <tr> 1033 <td><a href="command-line-options.html#sepia-tone">-sepia-tone <var>threshold</var></a></td> 1034 <td>simulate a sepia-toned photo</td> 1035 </tr> 1036 1037 <tr> 1038 <td><a href="command-line-options.html#set">-set <var>attribute value</var></a></td> 1039 <td>set an image attribute</td> 1040 </tr> 1041 1042 <tr> 1043 <td><a href="command-line-options.html#shade">-shade <var>degrees</var></a></td> 1044 <td>shade the image using a distant light source</td> 1045 </tr> 1046 1047 <tr> 1048 <td><a href="command-line-options.html#shadow">-shadow <var>geometry</var></a></td> 1049 <td>simulate an image shadow</td> 1050 </tr> 1051 1052 <tr> 1053 <td><a href="command-line-options.html#sharpen">-sharpen <var>geometry</var></a></td> 1054 <td>sharpen the image</td> 1055 </tr> 1056 1057 <tr> 1058 <td><a href="command-line-options.html#shave">-shave <var>geometry</var></a></td> 1059 <td>shave pixels from the image edges</td> 1060 </tr> 1061 1062 <tr> 1063 <td><a href="command-line-options.html#shear">-shear <var>geometry</var></a></td> 1064 <td>slide one edge of the image along the X or Y axis</td> 1065 </tr> 1066 1067 <tr> 1068 <td><a href="command-line-options.html#sigmoidal">-sigmoidal-contrast <var>geometry</var></a></td> 1069 <td>increase the contrast without saturating highlights or shadows</td> 1070 </tr> 1071 1072 <tr> 1073 <td><a href="command-line-options.html#smush">-smush <var>offset</var></a></td> 1074 <td>smush an image sequence together</td> 1075 </tr> 1076 1077 <tr> 1078 <td><a href="command-line-options.html#size">-size <var>geometry</var></a></td> 1079 <td>width and height of image</td> 1080 </tr> 1081 1082 <tr> 1083 <td><a href="command-line-options.html#sketch">-sketch <var>geometry</var></a></td> 1084 <td>simulate a pencil sketch</td> 1085 </tr> 1086 1087 <tr> 1088 <td><a href="command-line-options.html#solarize">-solarize <var>threshold</var></a></td> 1089 <td>negate all pixels above the threshold level</td> 1090 </tr> 1091 1092 <tr> 1093 <td><a href="command-line-options.html#splice">-splice <var>geometry</var></a></td> 1094 <td>splice the background color into the image</td> 1095 </tr> 1096 1097 <tr> 1098 <td><a href="command-line-options.html#spread">-spread <var>radius</var></a></td> 1099 <td>displace image pixels by a random amount</td> 1100 </tr> 1101 1102 <tr> 1103 <td><a href="command-line-options.html#statistic">-statistic <var>type</var> <var>geometry</var></a></td> 1104 <td>replace each pixel with corresponding statistic from the neighborhood</td> 1105 </tr> 1106 1107 <tr> 1108 <td><a href="command-line-options.html#strip">-strip</a></td> 1109 <td>strip image of all profiles and comments</td> 1110 </tr> 1111 1112 <tr> 1113 <td><a href="command-line-options.html#stroke">-stroke <var>color</var></a></td> 1114 <td>graphic primitive stroke color</td> 1115 </tr> 1116 1117 <tr> 1118 <td><a href="command-line-options.html#strokewidth">-strokewidth <var>value</var></a></td> 1119 <td>graphic primitive stroke width</td> 1120 </tr> 1121 1122 <tr> 1123 <td><a href="command-line-options.html#stretch">-stretch <var>type</var></a></td> 1124 <td>render text with this font stretch</td> 1125 </tr> 1126 1127 <tr> 1128 <td><a href="command-line-options.html#style">-style <var>type</var></a></td> 1129 <td>render text with this font style</td> 1130 </tr> 1131 1132 <tr> 1133 <td><a href="command-line-options.html#swap">-swap <var>indexes</var></a></td> 1134 <td>swap two images in the image sequence</td> 1135 </tr> 1136 1137 <tr> 1138 <td><a href="command-line-options.html#swirl">-swirl <var>degrees</var></a></td> 1139 <td>swirl image pixels about the center</td> 1140 </tr> 1141 1142 <tr> 1143 <td><a href="command-line-options.html#synchronize">-synchronize</a></td> 1144 <td>synchronize image to storage device</td> 1145 </tr> 1146 1147 <tr> 1148 <td><a href="command-line-options.html#taint">-taint</a></td> 1149 <td>mark the image as modified</td> 1150 </tr> 1151 1152 <tr> 1153 <td><a href="command-line-options.html#texture">-texture <var>filename</var></a></td> 1154 <td>name of texture to tile onto the image background</td> 1155 </tr> 1156 1157 <tr> 1158 <td><a href="command-line-options.html#threshold">-threshold <var>value</var></a></td> 1159 <td>threshold the image</td> 1160 </tr> 1161 1162 <tr> 1163 <td><a href="command-line-options.html#thumbnail">-thumbnail <var>geometry</var></a></td> 1164 <td>create a thumbnail of the image</td> 1165 </tr> 1166 1167 <tr> 1168 <td><a href="command-line-options.html#tile">-tile <var>filename</var></a></td> 1169 <td>tile image when filling a graphic primitive</td> 1170 </tr> 1171 1172 <tr> 1173 <td><a href="command-line-options.html#tile-offset">-tile-offset <var>geometry</var></a></td> 1174 <td>set the image tile offset</td> 1175 </tr> 1176 1177 <tr> 1178 <td><a href="command-line-options.html#tint">-tint <var>value</var></a></td> 1179 <td>tint the image with the fill color</td> 1180 </tr> 1181 1182 <tr> 1183 <td><a href="command-line-options.html#transform">-transform</a></td> 1184 <td>affine transform image</td> 1185 </tr> 1186 1187 <tr> 1188 <td><a href="command-line-options.html#transparent">-transparent <var>color</var></a></td> 1189 <td>make this color transparent within the image</td> 1190 </tr> 1191 1192 <tr> 1193 <td><a href="command-line-options.html#transparent-color">-transparent-color <var>color</var></a></td> 1194 <td>transparent color</td> 1195 </tr> 1196 1197 <tr> 1198 <td><a href="command-line-options.html#transpose">-transpose</a></td> 1199 <td>flip image in the vertical direction and rotate 90 degrees</td> 1200 </tr> 1201 1202 <tr> 1203 <td><a href="command-line-options.html#transverse">-transverse</a></td> 1204 <td>flop image in the horizontal direction and rotate 270 degrees</td> 1205 </tr> 1206 1207 <tr> 1208 <td><a href="command-line-options.html#treedepth">-treedepth <var>value</var></a></td> 1209 <td>color tree depth</td> 1210 </tr> 1211 1212 <tr> 1213 <td><a href="command-line-options.html#trim">-trim</a></td> 1214 <td>trim image edges</td> 1215 </tr> 1216 1217 <tr> 1218 <td><a href="command-line-options.html#type">-type <var>type</var></a></td> 1219 <td>image type</td> 1220 </tr> 1221 1222 <tr> 1223 <td><a href="command-line-options.html#undercolor">-undercolor <var>color</var></a></td> 1224 <td>annotation bounding box color</td> 1225 </tr> 1226 1227 <tr> 1228 <td><a href="command-line-options.html#unique-colors">-unique-colors</a></td> 1229 <td>discard all but one of any pixel color.</td> 1230 </tr> 1231 1232 <tr> 1233 <td><a href="command-line-options.html#units">-units <var>type</var></a></td> 1234 <td>the units of image resolution</td> 1235 </tr> 1236 1237 <tr> 1238 <td><a href="command-line-options.html#unsharp">-unsharp <var>geometry</var></a></td> 1239 <td>sharpen the image</td> 1240 </tr> 1241 1242 <tr> 1243 <td><a href="command-line-options.html#verbose">-verbose</a></td> 1244 <td>print detailed information about the image</td> 1245 </tr> 1246 1247 <tr> 1248 <td><a href="command-line-options.html#version">-version</a></td> 1249 <td>print version information</td> 1250 </tr> 1251 1252 <tr> 1253 <td><a href="command-line-options.html#view">-view</a></td> 1254 <td>FlashPix viewing transforms</td> 1255 </tr> 1256 1257 <tr> 1258 <td><a href="command-line-options.html#vignette">-vignette <var>geometry</var></a></td> 1259 <td>soften the edges of the image in vignette style</td> 1260 </tr> 1261 1262 <tr> 1263 <td><a href="command-line-options.html#virtual-pixel">-virtual-pixel <var>method</var></a></td> 1264 <td>access method for pixels outside the boundaries of the image</td> 1265 </tr> 1266 1267 <tr> 1268 <td><a href="command-line-options.html#wave">-wave <var>geometry</var></a></td> 1269 <td>alter an image along a sine wave</td> 1270 </tr> 1271 1272 <tr> 1273 <td><a href="command-line-options.html#wavelet">-wavelet-denoise <var>threshold</var></a></td> 1274 <td>removes noise from the image using a wavelet transform</td> 1275 </tr> 1276 1277 <tr> 1278 <td><a href="command-line-options.html#weight">-weight <var>type</var></a></td> 1279 <td>render text with this font weight</td> 1280 </tr> 1281 1282 <tr> 1283 <td><a href="command-line-options.html#white-point">-white-point <var>point</var></a></td> 1284 <td>chromaticity white point</td> 1285 </tr> 1286 1287 <tr> 1288 <td><a href="command-line-options.html#white-threshold">-white-threshold <var>value</var></a></td> 1289 <td>force all pixels above the threshold into white</td> 1290 </tr> 1291 1292 <tr> 1293 <td><a href="command-line-options.html#write">-write <var>filename</var></a></td> 1294 <td>write images to this 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