MAN page from Fedora 11 libtiff-3.8.2-15.fc11.x86_64.rpm

TIFF2RGBA

Section: User Commands (1)
Updated: November 2, 2005
Index

NAME

tiff2rgba - convert a TIFFimage to RGBA color space

SYNOPSIS

tiff2rgba[options]input.tifoutput.tif

DESCRIPTION

Tiff2rgbaconverts a wide variety of TIFF images into an RGBA TIFF image. This includes the ability to translate different color spaces and photometricinterpretation into RGBA, support for alpha blending, and translationof many different bit depths into a 32bit RGBA image.Internally this program is implemented using theTIFFReadRGBAImage()function, and it suffers any limitations of that image. This includeslimited support for > 8 BitsPerSample images, and flaws with someesoteric combinations of BitsPerSample, photometric interpretation, block organization and planar configuration. The generated images are stripped images with four samples per pixel (red, green, blue and alpha) or if the -n flag is used, three samplesper pixel (red, green, and blue). The resulting images are always planarconfiguration contiguous. For this reason, this program is a useful utilityfor transform exotic TIFF files into a form ingestible by almost any TIFFsupporting software.

OPTIONS

-c: Specify a compression scheme to use when writing image data:-c nonefor no compression (the default),-c packbitsfor the PackBits compression algorithm,-c zipfor the Deflate compression algorithm,-c jpegfor the JPEG compression algorithm,and-c lzwfor Lempel-Ziv & Welch.
-r: Write data with a specified number of rows per strip;by default the number of rows/strip is selected so that each stripis approximately 8 kilobytes.
-b: Process the image one block (strip/tile) at a time instead of by readingthe whole image into memory at once. This may be necessary for very largeimages on systems with limited RAM.
-n: Drop the alpha component from the output file, producing a pure RGB file.Currently this does not work if the -b flag is also in effect.