tiff2rgba(1) [centos man page]

TIFF2RGBA(1)						      General Commands Manual						      TIFF2RGBA(1)

NAME

       tiff2rgba - convert a TIFF image to RGBA color space

SYNOPSIS

       tiff2rgba [ options ] input.tif output.tif

DESCRIPTION

       Tiff2rgba  converts  a  wide variety of TIFF images into an RGBA TIFF image.  This includes the ability to translate different color spaces
       and photometric interpretation into RGBA, support for alpha blending, and translation of many different bit depths into a 32bit RGBA image.

       Internally this program is implemented using the TIFFReadRGBAImage() function, and it suffers any limitations of that image.  This includes
       limited support for > 8 BitsPerSample images, and flaws with some esoteric 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  samples
       per  pixel  (red,  green,  and blue).  The resulting images are always planar configuration contiguous.	For this reason, this program is a
       useful utility for transform exotic TIFF files into a form ingestible by almost any TIFF supporting software.

OPTIONS

       -c     Specify a compression scheme to use when writing image data: -c none for no compression (the default), -c packbits for the  PackBits
	      compression algorithm, -c zip for the Deflate compression algorithm, -c jpeg for the JPEG compression algorithm, and -c lzw for Lem-
	      pel-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 strip is approxi-
	      mately 8 kilobytes.

       -b     Process the image one block (strip/tile) at a time instead of by reading the whole image into memory at once.  This may be necessary
	      for very large images 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.

SEE ALSO

       tiff2bw(1), TIFFReadRGBAImage(3t), libtiff(3)

       Libtiff library home page: http://www.remotesensing.org/libtiff/

libtiff 							 November 2, 2005						      TIFF2RGBA(1)

tiff2bw(1)							   User Commands							tiff2bw(1)

NAME

       tiff2bw - convert a color TIFF image to grayscale

SYNOPSIS

       tiff2bw [options] input.tif output.tif

DESCRIPTION

       tiff2bw	converts an RGB or palette color TIFF image to a grayscale image by combining percentages of the red, green, and blue channels. By
       default, output samples are created by taking 28% of the red channel, 59% of the green channel, and 11% of the blue channel. To alter these
       percentages, use the -R. -G, and -B options.

OPTIONS

       The following options are supported:

       -B	       Specify the percentage of the blue channel to use. The default value is 11.

       -c	       Specify a compression scheme to use when writing image data:

		       -c g3		       CCITT Group 3 compression algorithm.

		       -c g4		       CCITT Group 4 compression algorithm.

		       -c lzw		       Lempel-Ziv and Welch algorithm. This is the default algorithm.

		       -c none		       No compression.

		       -c packbits	       PackBits compression algorithm.

		       -c zip		       Deflate compression algorithm.

       -G	       Specify the percentage of the green channel to use. The default value is 59.

       -R	       Specify the percentage of the red channel to use. The default value is 28.

       -r	       Write  data  with  a  specified number of rows per strip. By default, the number of rows per strip is selected so that each
		       strip is approximately 8 kilobytes.

OPERANDS

       The following operands are supported:

       input.tif       The name of the input TIFF file.

       output.tif      The name of the output file.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWTiff			   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)

NOTES

       Updated by Breda McColgan, Sun Microsystems Inc., 2004.

SunOS 5.11							    26 Mar 2004 							tiff2bw(1)