| 1 | .\" $Id: tiff2rgba.1,v 1.3 2005/11/02 11:07:19 dron Exp $ |
| 2 | .\" |
| 3 | .\" Copyright (c) 1988-1997 Sam Leffler |
| 4 | .\" Copyright (c) 1991-1997 Silicon Graphics, Inc. |
| 5 | .\" |
| 6 | .\" Permission to use, copy, modify, distribute, and sell this software and |
| 7 | .\" its documentation for any purpose is hereby granted without fee, provided |
| 8 | .\" that (i) the above copyright notices and this permission notice appear in |
| 9 | .\" all copies of the software and related documentation, and (ii) the names of |
| 10 | .\" Sam Leffler and Silicon Graphics may not be used in any advertising or |
| 11 | .\" publicity relating to the software without the specific, prior written |
| 12 | .\" permission of Sam Leffler and Silicon Graphics. |
| 13 | .\" |
| 14 | .\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
| 15 | .\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
| 16 | .\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
| 17 | .\" |
| 18 | .\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
| 19 | .\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
| 20 | .\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 21 | .\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
| 22 | .\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 23 | .\" OF THIS SOFTWARE. |
| 24 | .\" |
| 25 | .if n .po 0 |
| 26 | .TH TIFF2RGBA 1 "November 2, 2005" "libtiff" |
| 27 | .SH NAME |
| 28 | tiff2rgba \- convert a |
| 29 | .SM TIFF |
| 30 | image to RGBA color space |
| 31 | .SH SYNOPSIS |
| 32 | .B tiff2rgba |
| 33 | [ |
| 34 | options |
| 35 | ] |
| 36 | .I input.tif |
| 37 | .I output.tif |
| 38 | .SH DESCRIPTION |
| 39 | .I Tiff2rgba |
| 40 | converts a wide variety of TIFF images into an RGBA TIFF image. This |
| 41 | includes the ability to translate different color spaces and photometric |
| 42 | interpretation into RGBA, support for alpha blending, and translation |
| 43 | of many different bit depths into a 32bit RGBA image. |
| 44 | .P |
| 45 | Internally this program is implemented using the |
| 46 | .I TIFFReadRGBAImage() |
| 47 | function, and it suffers any limitations of that image. This includes |
| 48 | limited support for > 8 BitsPerSample images, and flaws with some |
| 49 | esoteric combinations of BitsPerSample, photometric interpretation, |
| 50 | block organization and planar configuration. |
| 51 | .P |
| 52 | The generated images are stripped images with four samples per pixel |
| 53 | (red, green, blue and alpha) or if the -n flag is used, three samples |
| 54 | per pixel (red, green, and blue). The resulting images are always planar |
| 55 | configuration contiguous. For this reason, this program is a useful utility |
| 56 | for transform exotic TIFF files into a form ingestible by almost any TIFF |
| 57 | supporting software. |
| 58 | .SH OPTIONS |
| 59 | .TP |
| 60 | .B \-c |
| 61 | Specify a compression scheme to use when writing image data: |
| 62 | .B "\-c none" |
| 63 | for no compression (the default), |
| 64 | .B "-c packbits" |
| 65 | for the PackBits compression algorithm, |
| 66 | .B "-c zip |
| 67 | for the Deflate compression algorithm, |
| 68 | .B "-c jpeg |
| 69 | for the JPEG compression algorithm, |
| 70 | and |
| 71 | .B "\-c lzw" |
| 72 | for Lempel-Ziv & Welch. |
| 73 | .TP |
| 74 | .B \-r |
| 75 | Write data with a specified number of rows per strip; |
| 76 | by default the number of rows/strip is selected so that each strip |
| 77 | is approximately 8 kilobytes. |
| 78 | .TP |
| 79 | .B \-b |
| 80 | Process the image one block (strip/tile) at a time instead of by reading |
| 81 | the whole image into memory at once. This may be necessary for very large |
| 82 | images on systems with limited RAM. |
| 83 | .TP |
| 84 | .B \-n |
| 85 | Drop the alpha component from the output file, producing a pure RGB file. |
| 86 | Currently this does not work if the -b flag is also in effect. |
| 87 | .SH "SEE ALSO" |
| 88 | .BR tiff2bw (1), |
| 89 | .BR TIFFReadRGBAImage (3t), |
| 90 | .BR libtiff (3) |
| 91 | .PP |
| 92 | Libtiff library home page: |
| 93 | .BR http://www.remotesensing.org/libtiff/ |