projects / wxWidgets.git / blame
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|---|---|---|
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1 | .\" |
| 2 | .\" Copyright (c) 1988-1997 Sam Leffler | |
| 3 | .\" Copyright (c) 1991-1997 Silicon Graphics, Inc. | |
| 4 | .\" | |
| 5 | .\" Permission to use, copy, modify, distribute, and sell this software and | |
| 6 | .\" its documentation for any purpose is hereby granted without fee, provided | |
| 7 | .\" that (i) the above copyright notices and this permission notice appear in | |
| 8 | .\" all copies of the software and related documentation, and (ii) the names of | |
| 9 | .\" Sam Leffler and Silicon Graphics may not be used in any advertising or | |
| 10 | .\" publicity relating to the software without the specific, prior written | |
| 11 | .\" permission of Sam Leffler and Silicon Graphics. | |
| 12 | .\" | |
| 13 | .\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, | |
| 14 | .\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY | |
| 15 | .\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. | |
| 16 | .\" | |
| 17 | .\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR | |
| 18 | .\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, | |
| 19 | .\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
| 20 | .\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF | |
| 21 | .\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
| 22 | .\" OF THIS SOFTWARE. | |
| 23 | .\" | |
| 24 | .if n .po 0 | |
| 25 | .TH TIFF2BW 1 "November 2, 2005" "libtiff" | |
| 26 | .SH NAME | |
| 27 | tiff2bw \- convert a color | |
| 28 | .SM TIFF | |
| 29 | image to greyscale | |
| 30 | .SH SYNOPSIS | |
| 31 | .B tiff2bw | |
| 32 | [ | |
| 80ed523f | 33 | .I options |
| 8414a40c VZ |
34 | ] |
| 35 | .I input.tif | |
| 36 | .I output.tif | |
| 37 | .SH DESCRIPTION | |
| 38 | .I Tiff2bw | |
| 39 | converts an | |
| 40 | .SM RGB | |
| 41 | or Palette color | |
| 42 | .SM TIFF | |
| 43 | image to a greyscale image by | |
| 44 | combining percentages of the red, green, and blue channels. | |
| 45 | By default, output samples are created by taking | |
| 46 | 28% of the red channel, 59% of the green channel, and 11% of | |
| 47 | the blue channel. | |
| 48 | To alter these percentages, the | |
| 49 | .BR \-R , | |
| 50 | .BR \-G , | |
| 51 | and | |
| 52 | .BR \-B | |
| 53 | options may be used. | |
| 54 | .SH OPTIONS | |
| 55 | .TP | |
| 56 | .B \-c | |
| 57 | Specify a compression scheme to use when writing image data: | |
| 58 | .B "\-c none" | |
| 59 | for no compression, | |
| 80ed523f | 60 | .B "\-c packbits" |
| 8414a40c | 61 | for the PackBits compression algorithm, |
| 80ed523f | 62 | .B "\-c zip |
| 8414a40c | 63 | for the Deflate compression algorithm, |
| 80ed523f | 64 | .B "\-c g3 |
| 8414a40c | 65 | for the CCITT Group 3 compression algorithm, |
| 80ed523f | 66 | .B "\-c g4 |
| 8414a40c VZ |
67 | for the CCITT Group 4 compression algorithm, |
| 68 | and | |
| 69 | .B "\-c lzw" | |
| 70 | for Lempel-Ziv & Welch (the default). | |
| 71 | .TP | |
| 72 | .B \-r | |
| 73 | Write data with a specified number of rows per strip; | |
| 74 | by default the number of rows/strip is selected so that each strip | |
| 75 | is approximately 8 kilobytes. | |
| 76 | .TP | |
| 77 | .B \-R | |
| 78 | Specify the percentage of the red channel to use (default 28). | |
| 79 | .TP | |
| 80 | .B \-G | |
| 81 | Specify the percentage of the green channel to use (default 59). | |
| 82 | .TP | |
| 83 | .B \-B | |
| 84 | Specify the percentage of the blue channel to use (default 11). | |
| 85 | .SH "SEE ALSO" | |
| 86 | .BR pal2rgb (1), | |
| 87 | .BR tiffinfo (1), | |
| 88 | .BR tiffcp (1), | |
| 89 | .BR tiffmedian (1), | |
| 90 | .BR libtiff (3) | |
| 91 | .PP | |
| 92 | Libtiff library home page: | |
| 93 | .BR http://www.remotesensing.org/libtiff/ |