src/tiff/html/man/tiffcrop.1.html

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   7 <title>TIFFCROP</title>
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  10
  11 <h1 align=center>TIFFCROP</h1>
  12 <a href="#NAME">NAME</a><br>
  13 <a href="#SYNOPSIS">SYNOPSIS</a><br>
  14 <a href="#DESCRIPTION">DESCRIPTION</a><br>
  15 <a href="#OPTIONS">OPTIONS</a><br>
  16 <a href="#EXAMPLES">EXAMPLES</a><br>
  17 <a href="#SEE ALSO">SEE ALSO</a><br>
  18
  19 <hr>
  20 <a name="NAME"></a>
  21 <h2>NAME</h2>
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  27 <td width="91%">
  28 <p>tiffcrop &minus; copy (and possibly convert and crop or
  29 process) a <small>TIFF</small> file</p>
  30 </td>
  31 </table>
  32 <a name="SYNOPSIS"></a>
  33 <h2>SYNOPSIS</h2>
  34 <!-- INDENTATION -->
  35 <table width="100%" border=0 rules="none" frame="void"
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  38 <td width="8%"></td>
  39 <td width="91%">
  40 <p><b>tiffcrop</b> [ <i>options</i> ] <i>src1.tif ...
  41 srcN.tif dst.tif</i></p>
  42 </td>
  43 </table>
  44 <a name="DESCRIPTION"></a>
  45 <h2>DESCRIPTION</h2>
  46 <!-- INDENTATION -->
  47 <table width="100%" border=0 rules="none" frame="void"
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  49 <tr valign="top" align="left">
  50 <td width="8%"></td>
  51 <td width="91%">
  52 <p><i>tiffcrop</i> combines one or more files created
  53 according to the Tag Image File Format, Revision 6.0 into a
  54 single <small>TIFF</small> file. The output file may be
  55 compressed using a different algorithm than the input files.
  56 <i>tiffcrop</i> is most often used to extract portions of an
  57 image for processing with bar code recognizer or OCR
  58 software when that software cannot restrict the region of
  59 interest to a specific portion of the image or to improve
  60 efficiency when the regions of interest must be rotated.</p>
  61 <!-- INDENTATION -->
  62 <p>By default, <i>tiffcrop</i> will copy all the understood
  63 tags in a <small>TIFF</small> directory of an input file to
  64 the associated directory in the output file.</p>
  65 <!-- INDENTATION -->
  66 <p><i>tiffcrop</i> can be used to reorganize the storage
  67 characteristics of data in a file, and it will alter or
  68 convert the image data content as specified at the same
  69 time, unlike tiffcp.</p>
  70 <!-- INDENTATION -->
  71 <p><i>tiffcrop</i> will behave exactly like tiffcp if none
  72 of the new options are specified.</p>
  73 </td>
  74 </table>
  75 <a name="OPTIONS"></a>
  76 <h2>OPTIONS</h2>
  77 <!-- INDENTATION -->
  78 <table width="100%" border=0 rules="none" frame="void"
  79        cols="2" cellspacing="0" cellpadding="0">
  80 <tr valign="top" align="left">
  81 <td width="8%"></td>
  82 <td width="91%">
  83 <p><b>&minus;N odd|even|#,#-#,#|last</b></p></td>
  84 </table>
  85 <!-- INDENTATION -->
  86 <table width="100%" border=0 rules="none" frame="void"
  87        cols="2" cellspacing="0" cellpadding="0">
  88 <tr valign="top" align="left">
  89 <td width="19%"></td>
  90 <td width="80%">
  91 <p>sequences and ranges of images within file to process.
  92 The words <b>odd</b> or <b>even</b> may be used to specify
  93 all odd or even numbered images. The word <b>last</b> may be
  94 used in place of a number in the sequence to indicate the
  95 final image in the file without knowing how many images
  96 there are. Ranges of images may be specified with a dash and
  97 multiple sets can be indicated by joining them in a
  98 comma-separated list. e.g.. use <b>&minus;N 1,5-7,last</b>
  99 to process the 1st, 5th through 7th, and final image in the
 100 file.</p>
 101 </td>
 102 </table>
 103 <!-- INDENTATION -->
 104 <table width="100%" border=0 rules="none" frame="void"
 105        cols="2" cellspacing="0" cellpadding="0">
 106 <tr valign="top" align="left">
 107 <td width="8%"></td>
 108 <td width="91%">
 109 <p><b>&minus;E top|bottom|left|right</b></p></td>
 110 </table>
 111 <!-- INDENTATION -->
 112 <table width="100%" border=0 rules="none" frame="void"
 113        cols="2" cellspacing="0" cellpadding="0">
 114 <tr valign="top" align="left">
 115 <td width="19%"></td>
 116 <td width="80%">
 117 <p>use the top, bottom, left, or right edge as origin
 118 reference for width and length of crop regions. May be
 119 abbreviated to first letter.</p>
 120 </td>
 121 </table>
 122 <!-- INDENTATION -->
 123 <table width="100%" border=0 rules="none" frame="void"
 124        cols="2" cellspacing="0" cellpadding="0">
 125 <tr valign="top" align="left">
 126 <td width="8%"></td>
 127 <td width="91%">
 128 <p><b>&minus;U in|cm|px</b></p></td>
 129 </table>
 130 <!-- INDENTATION -->
 131 <table width="100%" border=0 rules="none" frame="void"
 132        cols="2" cellspacing="0" cellpadding="0">
 133 <tr valign="top" align="left">
 134 <td width="19%"></td>
 135 <td width="80%">
 136 <p>units to apply to dimensions for margins and crop
 137 regions. Inches or centimeters are converted to pixels using
 138 the resolution unit specified in the TIFF file (which
 139 defaults to inches if not specified in the IFD).</p>
 140 </td>
 141 </table>
 142 <!-- INDENTATION -->
 143 <table width="100%" border=0 rules="none" frame="void"
 144        cols="2" cellspacing="0" cellpadding="0">
 145 <tr valign="top" align="left">
 146 <td width="8%"></td>
 147 <td width="91%">
 148 <p><b>&minus;m #,#,#,#</b></p></td>
 149 </table>
 150 <!-- INDENTATION -->
 151 <table width="100%" border=0 rules="none" frame="void"
 152        cols="2" cellspacing="0" cellpadding="0">
 153 <tr valign="top" align="left">
 154 <td width="19%"></td>
 155 <td width="80%">
 156 <p>margins to be removed from the image. The order must be
 157 top, left, bottom, right with only commas separating the
 158 elements of the list. Margins are scaled according to the
 159 current units and removed before any other extractions are
 160 computed. Capital M was in use.</p>
 161 </td>
 162 </table>
 163 <!-- TABS -->
 164 <table width="100%" border=0 rules="none" frame="void"
 165        cols="5" cellspacing="0" cellpadding="0">
 166 <tr valign="top" align="left">
 167 <td width="10%"></td>
 168 <td width="6%">
 169
 170 <p><b>&minus;X #</b></p>
 171 </td>
 172 <td width="2%"></td>
 173 <td width="80%">
 174
 175 <p>horizontal (X-axis) dimension of a region to extract
 176 relative to the specified origin reference. If the origin is
 177 the top or bottom edge, the X axis value will be assumed to
 178 start at the left edge.</p>
 179 </td>
 180 <td width="0%">
 181 </td>
 182 <tr valign="top" align="left">
 183 <td width="10%"></td>
 184 <td width="6%">
 185
 186 <p><b>&minus;Y #</b></p>
 187 </td>
 188 <td width="2%"></td>
 189 <td width="80%">
 190
 191 <p>vertical (Y-axis) dimension of a region to extract
 192 relative to the specified origin reference. If the origin is
 193 the left or right edge, the Y axis value will be assumed to
 194 start at the top.</p>
 195 </td>
 196 <td width="0%">
 197 </td>
 198 </table>
 199 <!-- INDENTATION -->
 200 <table width="100%" border=0 rules="none" frame="void"
 201        cols="2" cellspacing="0" cellpadding="0">
 202 <tr valign="top" align="left">
 203 <td width="8%"></td>
 204 <td width="91%">
 205 <p><b>&minus;Z #:#,#:#</b></p></td>
 206 </table>
 207 <!-- INDENTATION -->
 208 <table width="100%" border=0 rules="none" frame="void"
 209        cols="2" cellspacing="0" cellpadding="0">
 210 <tr valign="top" align="left">
 211 <td width="19%"></td>
 212 <td width="80%">
 213 <p>zones of the image designated as position X of Y equal
 214 sized portions measured from the reference edge, e.g. 1:3
 215 would be first third of the image starting from the
 216 reference edge minus any margins specified for the confining
 217 edges. Multiple zones can be specified as a comma separated
 218 list but they must reference the same edge. To extract the
 219 top quarter and the bottom third of an image you would use
 220 <b>&minus;Z 1:4,3:3.</b></p>
 221 </td>
 222 </table>
 223 <!-- INDENTATION -->
 224 <table width="100%" border=0 rules="none" frame="void"
 225        cols="2" cellspacing="0" cellpadding="0">
 226 <tr valign="top" align="left">
 227 <td width="8%"></td>
 228 <td width="91%">
 229 <p><b>&minus;F horiz|vert</b></p></td>
 230 </table>
 231 <!-- INDENTATION -->
 232 <table width="100%" border=0 rules="none" frame="void"
 233        cols="2" cellspacing="0" cellpadding="0">
 234 <tr valign="top" align="left">
 235 <td width="19%"></td>
 236 <td width="80%">
 237 <p>flip, i.e. mirror, the image or extracted region
 238 horizontally or vertically.</p>
 239 </td>
 240 </table>
 241 <!-- INDENTATION -->
 242 <table width="100%" border=0 rules="none" frame="void"
 243        cols="2" cellspacing="0" cellpadding="0">
 244 <tr valign="top" align="left">
 245 <td width="8%"></td>
 246 <td width="91%">
 247 <p><b>&minus;R 90|180|270</b></p></td>
 248 </table>
 249 <!-- INDENTATION -->
 250 <table width="100%" border=0 rules="none" frame="void"
 251        cols="2" cellspacing="0" cellpadding="0">
 252 <tr valign="top" align="left">
 253 <td width="19%"></td>
 254 <td width="80%">
 255 <p>rotate the image or extracted region 90, 180, or 270
 256 degrees clockwise.</p>
 257 </td>
 258 </table>
 259 <!-- TABS -->
 260 <table width="100%" border=0 rules="none" frame="void"
 261        cols="5" cellspacing="0" cellpadding="0">
 262 <tr valign="top" align="left">
 263 <td width="10%"></td>
 264 <td width="2%">
 265
 266 <p><b>&minus;I</b></p>
 267 </td>
 268 <td width="6%"></td>
 269 <td width="80%">
 270
 271 <p>invert the colorspace values for grayscale and bi-level
 272 images. This would be used to correct negative images that
 273 have incorrect PHOTOMETRIC INTERPRETATION tags. No support
 274 for color images.</p>
 275 </td>
 276 <td width="0%">
 277 </td>
 278 </table>
 279 <!-- INDENTATION -->
 280 <table width="100%" border=0 rules="none" frame="void"
 281        cols="2" cellspacing="0" cellpadding="0">
 282 <tr valign="top" align="left">
 283 <td width="8%"></td>
 284 <td width="91%">
 285 <p><b>&minus;b</b> <i>image</i></p></td>
 286 </table>
 287 <!-- INDENTATION -->
 288 <table width="100%" border=0 rules="none" frame="void"
 289        cols="2" cellspacing="0" cellpadding="0">
 290 <tr valign="top" align="left">
 291 <td width="19%"></td>
 292 <td width="80%">
 293 <p>subtract the following monochrome image from all others
 294 processed. This can be used to remove a noise bias from a
 295 set of images. This bias image is typically an image of
 296 noise the camera saw with its shutter closed. Bias image
 297 support is not available with options for cropping,
 298 rotating, or inverting the image.</p>
 299 </td>
 300 </table>
 301 <!-- TABS -->
 302 <table width="100%" border=0 rules="none" frame="void"
 303        cols="5" cellspacing="0" cellpadding="0">
 304 <tr valign="top" align="left">
 305 <td width="10%"></td>
 306 <td width="3%">
 307
 308 <p><b>&minus;B</b></p>
 309 </td>
 310 <td width="5%"></td>
 311 <td width="80%">
 312
 313 <p>Force output to be written with Big-Endian byte order.
 314 This option only has an effect when the output file is
 315 created or overwritten and not when it is appended to.</p>
 316 </td>
 317 <td width="0%">
 318 </td>
 319 <tr valign="top" align="left">
 320 <td width="10%"></td>
 321 <td width="3%">
 322
 323 <p><b>&minus;C</b></p>
 324 </td>
 325 <td width="5%"></td>
 326 <td width="80%">
 327
 328 <p>Suppress the use of &lsquo;&lsquo;strip
 329 chopping&rsquo;&rsquo; when reading images that have a
 330 single strip/tile of uncompressed data.</p>
 331 </td>
 332 <td width="0%">
 333 </td>
 334 <tr valign="top" align="left">
 335 <td width="10%"></td>
 336 <td width="3%">
 337
 338 <p><b>&minus;c</b></p>
 339 </td>
 340 <td width="5%"></td>
 341 <td width="80%">
 342
 343 <p>Specify the compression to use for data written to the
 344 output file: <b>none</b> for no compression, <b>packbits</b>
 345 for PackBits compression, <b>lzw</b> for Lempel-Ziv &amp;
 346 Welch compression, <b>jpeg</b> for baseline JPEG
 347 compression, <b>zip</b> for Deflate compression, <b>g3</b>
 348 for CCITT Group 3 (T.4) compression, and <b>g4</b> for CCITT
 349 Group 4 (T.6) compression. By default <i>tiffcrop</i> will
 350 compress data according to the value of the
 351 <i>Compression</i> tag found in the source file.</p>
 352 </td>
 353 <td width="0%">
 354 </td>
 355 </table>
 356 <!-- INDENTATION -->
 357 <table width="100%" border=0 rules="none" frame="void"
 358        cols="2" cellspacing="0" cellpadding="0">
 359 <tr valign="top" align="left">
 360 <td width="17%"></td>
 361 <td width="82%">
 362 <p>The <small>CCITT</small> Group 3 and Group 4 compression
 363 algorithms can only be used with bi-level data.</p>
 364 <!-- INDENTATION -->
 365 <p>Group 3 compression can be specified together with
 366 several T.4-specific options: <b>1d</b> for 1-dimensional
 367 encoding, <b>2d</b> for 2-dimensional encoding, and
 368 <b>fill</b> to force each encoded scanline to be zero-filled
 369 so that the terminating EOL code lies on a byte boundary.
 370 Group 3-specific options are specified by appending a
 371 &lsquo;&lsquo;:&rsquo;&rsquo;-separated list to the
 372 &lsquo;&lsquo;g3&rsquo;&rsquo; option; e.g. <b>&minus;c
 373 g3:2d:fill</b> to get 2D-encoded data with byte-aligned EOL
 374 codes.</p>
 375 <!-- INDENTATION -->
 376 <p><small>LZW</small> compression can be specified together
 377 with a <i>predictor</i> value. A predictor value of 2 causes
 378 each scanline of the output image to undergo horizontal
 379 differencing before it is encoded; a value of 1 forces each
 380 scanline to be encoded without differencing. LZW-specific
 381 options are specified by appending a
 382 &lsquo;&lsquo;:&rsquo;&rsquo;-separated list to the
 383 &lsquo;&lsquo;lzw&rsquo;&rsquo; option; e.g. <b>&minus;c
 384 lzw:2</b> for <small>LZW</small> compression with horizontal
 385 differencing.</p>
 386 </td>
 387 </table>
 388 <!-- TABS -->
 389 <table width="100%" border=0 rules="none" frame="void"
 390        cols="5" cellspacing="0" cellpadding="0">
 391 <tr valign="top" align="left">
 392 <td width="10%"></td>
 393 <td width="3%">
 394
 395 <p><b>&minus;f</b></p>
 396 </td>
 397 <td width="5%"></td>
 398 <td width="80%">
 399
 400 <p>Specify the bit fill order to use in writing output
 401 data. By default, <i>tiffcrop</i> will create a new file
 402 with the same fill order as the original. Specifying
 403 <b>&minus;f lsb2msb</b> will force data to be written with
 404 the FillOrder tag set to <small>LSB2MSB,</small> while
 405 <b>&minus;f msb2lsb</b> will force data to be written with
 406 the FillOrder tag set to <small>MSB2LSB.</small></p>
 407 </td>
 408 <td width="0%">
 409 </td>
 410 <tr valign="top" align="left">
 411 <td width="10%"></td>
 412 <td width="3%">
 413
 414 <p><b>&minus;i</b></p>
 415 </td>
 416 <td width="5%"></td>
 417 <td width="80%">
 418
 419 <p>Ignore non-fatal read errors and continue processing of
 420 the input file.</p>
 421 </td>
 422 <td width="0%">
 423 </td>
 424 <tr valign="top" align="left">
 425 <td width="10%"></td>
 426 <td width="3%">
 427
 428 <p><b>&minus;l</b></p>
 429 </td>
 430 <td width="5%"></td>
 431 <td width="80%">
 432
 433 <p>Specify the length of a tile (in pixels).
 434 <i>tiffcrop</i> attempts to set the tile dimensions so that
 435 no more than 8 kilobytes of data appear in a tile.</p>
 436 </td>
 437 <td width="0%">
 438 </td>
 439 <tr valign="top" align="left">
 440 <td width="10%"></td>
 441 <td width="3%">
 442
 443 <p><b>&minus;L</b></p>
 444 </td>
 445 <td width="5%"></td>
 446 <td width="80%">
 447
 448 <p>Force output to be written with Little-Endian byte
 449 order. This option only has an effect when the output file
 450 is created or overwritten and not when it is appended
 451 to.</p>
 452 </td>
 453 <td width="0%">
 454 </td>
 455 <tr valign="top" align="left">
 456 <td width="10%"></td>
 457 <td width="3%">
 458
 459 <p><b>&minus;M</b></p>
 460 </td>
 461 <td width="5%"></td>
 462 <td width="80%">
 463
 464 <p>Suppress the use of memory-mapped files when reading
 465 images.</p>
 466 </td>
 467 <td width="0%">
 468 </td>
 469 <tr valign="top" align="left">
 470 <td width="10%"></td>
 471 <td width="3%">
 472
 473 <p><b>&minus;p</b></p>
 474 </td>
 475 <td width="5%"></td>
 476 <td width="80%">
 477
 478 <p>Specify the planar configuration to use in writing image
 479 data that has one 8-bit sample per pixel. By default,
 480 <i>tiffcrop</i> will create a new file with the same planar
 481 configuration as the original. Specifying <b>&minus;p
 482 contig</b> will force data to be written with multi-sample
 483 data packed together, while <b>&minus;p separate</b> will
 484 force samples to be written in separate planes.</p>
 485 </td>
 486 <td width="0%">
 487 </td>
 488 <tr valign="top" align="left">
 489 <td width="10%"></td>
 490 <td width="3%">
 491
 492 <p><b>&minus;r</b></p>
 493 </td>
 494 <td width="5%"></td>
 495 <td width="80%">
 496
 497 <p>Specify the number of rows (scanlines) in each strip of
 498 data written to the output file. By default (or when value
 499 <b>0</b> is specified), <i>tiffcrop</i> attempts to set the
 500 rows/strip that no more than 8 kilobytes of data appear in a
 501 strip. If you specify special value <b>-1</b> it will
 502 results in infinite number of the rows per strip. The entire
 503 image will be the one strip in that case.</p>
 504 </td>
 505 <td width="0%">
 506 </td>
 507 <tr valign="top" align="left">
 508 <td width="10%"></td>
 509 <td width="3%">
 510
 511 <p><b>&minus;s</b></p>
 512 </td>
 513 <td width="5%"></td>
 514 <td width="80%">
 515
 516 <p>Force the output file to be written with data organized
 517 in strips (rather than tiles).</p>
 518 </td>
 519 <td width="0%">
 520 </td>
 521 <tr valign="top" align="left">
 522 <td width="10%"></td>
 523 <td width="3%">
 524
 525 <p><b>&minus;t</b></p>
 526 </td>
 527 <td width="5%"></td>
 528 <td width="80%">
 529
 530 <p>Force the output file to be written with data organized
 531 in tiles (rather than strips). options can be used to force
 532 the resultant image to be written as strips or tiles of
 533 data, respectively.</p>
 534 </td>
 535 <td width="0%">
 536 </td>
 537 <tr valign="top" align="left">
 538 <td width="10%"></td>
 539 <td width="3%">
 540
 541 <p><b>&minus;w</b></p>
 542 </td>
 543 <td width="5%"></td>
 544 <td width="80%">
 545
 546 <p>Specify the width of a tile (in pixels). <i>tiffcrop</i>
 547 attempts to set the tile dimensions so that no more than 8
 548 kilobytes of data appear in a tile. <i>tiffcrop</i> attempts
 549 to set the tile dimensions so that no more than 8 kilobytes
 550 of data appear in a tile.</p>
 551 </td>
 552 <td width="0%">
 553 </td>
 554 </table>
 555 <!-- INDENTATION -->
 556 <table width="100%" border=0 rules="none" frame="void"
 557        cols="2" cellspacing="0" cellpadding="0">
 558 <tr valign="top" align="left">
 559 <td width="8%"></td>
 560 <td width="91%">
 561 <p><b>&minus;,={character}</b></p></td>
 562 </table>
 563 <!-- INDENTATION -->
 564 <table width="100%" border=0 rules="none" frame="void"
 565        cols="2" cellspacing="0" cellpadding="0">
 566 <tr valign="top" align="left">
 567 <td width="19%"></td>
 568 <td width="80%">
 569 <p>substitute {character} for &rsquo;,&rsquo; in parsing
 570 image directory indices in files. This is necessary if
 571 filenames contain commas. Note that &rsquo;,=&rsquo; with
 572 whitespace immediately following will disable the special
 573 meaning of the &rsquo;,&rsquo; entirely. See examples.</p>
 574 </td>
 575 </table>
 576 <a name="EXAMPLES"></a>
 577 <h2>EXAMPLES</h2>
 578 <!-- INDENTATION -->
 579 <table width="100%" border=0 rules="none" frame="void"
 580        cols="2" cellspacing="0" cellpadding="0">
 581 <tr valign="top" align="left">
 582 <td width="8%"></td>
 583 <td width="91%">
 584 <p>The following concatenates two files and writes the
 585 result using <small>LZW</small> encoding:</p></td>
 586 </table>
 587 <!-- INDENTATION -->
 588 <table width="100%" border=0 rules="none" frame="void"
 589        cols="2" cellspacing="0" cellpadding="0">
 590 <tr valign="top" align="left">
 591 <td width="17%"></td>
 592 <td width="82%">
 593 <pre>tiffcrop -c lzw a.tif b.tif result.tif
 594 </pre>
 595 </td>
 596 </table>
 597 <!-- INDENTATION -->
 598
 599 <table width="100%" border=0 rules="none" frame="void"
 600        cols="2" cellspacing="0" cellpadding="0">
 601 <tr valign="top" align="left">
 602 <td width="8%"></td>
 603 <td width="91%">
 604 <p>To convert a G3 1d-encoded <small>TIFF</small> to a
 605 single strip of G4-encoded data the following might be
 606 used:</p></td>
 607 </table>
 608 <!-- INDENTATION -->
 609 <table width="100%" border=0 rules="none" frame="void"
 610        cols="2" cellspacing="0" cellpadding="0">
 611 <tr valign="top" align="left">
 612 <td width="17%"></td>
 613 <td width="82%">
 614 <pre>tiffcrop -c g4 -r 10000 g3.tif g4.tif
 615 </pre>
 616 </td>
 617 </table>
 618 <!-- INDENTATION -->
 619
 620 <table width="100%" border=0 rules="none" frame="void"
 621        cols="2" cellspacing="0" cellpadding="0">
 622 <tr valign="top" align="left">
 623 <td width="8%"></td>
 624 <td width="91%">
 625 <p>(1000 is just a number that is larger than the number of
 626 rows in the source file.)</p>
 627 <!-- INDENTATION -->
 628 <p>To extract a selected set of images from a multi-image
 629 TIFF file use the -N option described above. Thus, to copy
 630 the 1st and 3rd images of image file &quot;album.tif&quot;
 631 to &quot;result.tif&quot;:</p></td>
 632 </table>
 633 <!-- INDENTATION -->
 634 <table width="100%" border=0 rules="none" frame="void"
 635        cols="2" cellspacing="0" cellpadding="0">
 636 <tr valign="top" align="left">
 637 <td width="17%"></td>
 638 <td width="82%">
 639 <pre>tiffcrop -N 1,3 album.tif result.tif
 640 </pre>
 641 </td>
 642 </table>
 643 <!-- INDENTATION -->
 644
 645 <table width="100%" border=0 rules="none" frame="void"
 646        cols="2" cellspacing="0" cellpadding="0">
 647 <tr valign="top" align="left">
 648 <td width="8%"></td>
 649 <td width="91%">
 650 <p>Given file &quot;CCD.tif&quot; whose first image is a
 651 noise bias followed by images which include that bias,
 652 subtract the noise from all those images following it (while
 653 decompressing) with the command:</p></td>
 654 </table>
 655 <!-- INDENTATION -->
 656 <table width="100%" border=0 rules="none" frame="void"
 657        cols="2" cellspacing="0" cellpadding="0">
 658 <tr valign="top" align="left">
 659 <td width="17%"></td>
 660 <td width="82%">
 661 <pre>tiffcrop -c none -b CCD.tif CCD.tif -d 2 result.tif
 662 </pre>
 663 </td>
 664 </table>
 665 <a name="SEE ALSO"></a>
 666 <h2>SEE ALSO</h2>
 667 <!-- INDENTATION -->
 668
 669 <table width="100%" border=0 rules="none" frame="void"
 670        cols="2" cellspacing="0" cellpadding="0">
 671 <tr valign="top" align="left">
 672 <td width="8%"></td>
 673 <td width="91%">
 674 <p><b>pal2rgb</b>(1), <b>tiffinfo</b>(1), <b>tiffcmp</b>(1),
 675 <b>tiffcp</b>(1), <b>tiffmedian</b>(1), <b>tiffsplit</b>(1),
 676 <b>libtiff</b>(3TIFF)</p>
 677 <!-- INDENTATION -->
 678 <p>Libtiff library home page:
 679 <b>http://www.remotesensing.org/libtiff/</b></p>
 680 </td>
 681 </table>
 682 <hr>
 683 </body>
 684 </html>