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$Header: /cvsroot/openil/DevIL/test/in/tiff/README,v 1.1 2004/06/24 01:43:01 idadesub Exp $
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The following image files are included for testing. Note that a wide
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variety of images can be generated using the tools provided with the
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library (e.g. tiffcp, tiff2bw, tiffmedian, etc.); see below for some
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PlanarConfiguration = 1 (packed data)
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-------------------------------------
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caspian.tif 279x220 64-bit floating point (deflate) Caspian Sea from space
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cramps.tif 800x607 8-bit b&w (packbits) "cramps poster"
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cramps-tile.tif 256x256 tiled version of cramps.tif (no compression)
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fax2d.tif 1728x1082 1-bit b&w (G3/2D) facsimile
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g3test.g3 raw Group 3 encoded fax file
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g3test.tif TIFF equivalent of g3test.g3 created by fax2tiff
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jello.tif 256x192 8-bit RGB (lzw palette) Paul Heckbert "jello"
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off_l16.tif 333x225 8-bit CIE LogL (SGILog) office from Greg Larson
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off_luv24.tif 333x225 8-bit CIE LogLuv (SGILog24) office from " "
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off_luv32.tif 333x225 8-bit CIE LogLuv (SGILog) office from " "
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quad-jpeg.tif 512x384 8-bit YCbCr (jpeg) version of quad-lzw.tif
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quad-lzw.tif 512x384 8-bit RGB (lzw) "quadric surfaces"
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quad-tile.tif 512x384 tiled version of quad-lzw.tif (lzw)
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strike.tif 256x200 8-bit RGBA (lzw) "bowling pins" from Pixar
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text.tif 1512x359 4-bit b&w (thunderscan) am-express credit card
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ycbcr-cat.tif 250x325 8-bit YCbCr (lzw) "kitty" created by rgb2ycbcr
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smallliz.tif 160x160 8-bit YCbCr (OLD jpeg) lizard from HP**
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zackthecat.tif 234x213 8-bit YCbCr (OLD jpeg) tiled "ZackTheCat" from NeXT**
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** These images are in a deprecated format and are included only for testing
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backwards compatibility. JPEG-encoded TIFF images use a different scheme
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described in TIFF Technical Note #2 and implemented by libtiff.
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PlanarConfiguration = 2 (separated samples)
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-------------------------------------------
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oxford.tif 601x81 8-bit RGB (lzw) screendump off oxford
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The other images are from Hewlett Packard and exemplify the use of the
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HalftoneHints tag (in their words):
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The images are all the same subject, and should all appear the same
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after rendering. Each of the images is slightly different as outlined
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by the following table:
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FileName ToneRange HalftoneHints
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The images with tone range A are 0-100% linear reflectance images,
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in other words, fixed full gamut tone range. The images with tone
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range B are what we call "normalized", meaning that the image has
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been tone adjusted such the Highlight and Shadow are at gray levels
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1 & 2**BitsPerSample-2.
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Each of the three grayscale images should be rendered to look like
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the halftone in pics/jim___ah.tif when printed on a Canon SX engine.
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The file g3test.tif was created from g3test.g3 with the command:
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fax2tiff -o t.tif -1 -p -M -R 98 g3test.g3
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Tiled images can be created with tiffcp; e.g.
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tiffcp -t -c none cramps.tif cramps-tile.tif
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(but the tiled images included here were actually generated by the
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Silicon Graphics Image Library).
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The file quad-jpeg.tif was created from quad-lzw.tif with the command:
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tiffcp -c jpeg quad-lzw.tif quad-jpeg.tif
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To generate a tiled image with separated samples the following might
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tiffcp -t -p separate quad-lzw.tif t.tif
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[ Beware that tiffcp does not handle every format TIFF image. In particular,
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when conversion between tiled and strip'd images is reliable only when
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To generate a G4-encoded image with a single strip the following would work:
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tiffcp -c g4 -r 1082 fax2d.tif t.tif
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Contributing New Images
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-----------------------
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If you have images that are significantly different from those included
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in this package and that do NOT HAVE A COPYRIGHT; feel free to send them
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to me at sam@engr.sgi.com. I prefer to receive a URL to a location from
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which I can retrieve the image by public FTP. However if that is not
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possible you can send it to me in a mail message uuencode'd. Please do
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not send large images by mail. Also, please do not send me an image
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unless it is notably unique; e.g. not easily generated using the tools
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test/in/tiff/README
