1999-07-27 17:50:26 -04:00
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<HTML>
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<HEAD>
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<TITLE>
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TIFF 6.0 Specification Coverage
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</TITLE>
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</HEAD>
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1999-08-09 16:16:59 -04:00
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<BODY BGCOLOR=white>
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<FONT FACE="Arial, Sans, Helvetica">
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1999-07-27 17:50:26 -04:00
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<H1>
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<IMG SRC=images/strike.gif WIDTH=128 HEIGHT=100 ALIGN=left HSPACE=6>
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TIFF 6.0 Specification Coverage
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</H1>
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<P>
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The library is capable of dealing with images that are written to
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follow the 5.0 or 6.0 TIFF spec. There is also considerable support
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for some of the more esoteric portions of the 6.0 TIFF spec.
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<P>
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<TABLE BORDER CELLPADDING=3>
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<TR>
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<TD VALIGN=top>
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<I>Core requirements</I>
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</TD>
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<TD>
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Both <TT>"MM"</TT> and <TT>"II"</TT> byte orders are handled.
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Both packed and separated planar configuration of samples.
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Any number of samples per pixel (memory permitting).
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Any image width and height (memory permitting).
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Multiple subfiles can be read and written.
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Editing is <B>not</B> supported in that related subfiles (e.g.
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a reduced resolution version of an image) are not automatically
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updated.
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<P>
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Tags handled:
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<TT>ExtraSamples</TT>,
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<TT>ImageWidth</TT>,
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<TT>ImageLength</TT>,
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<TT>NewSubfileType</TT>,
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<TT>ResolutionUnit</TT>.
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<TT>Rowsperstrip</TT>,
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<TT>StripOffsets</TT>,
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<TT>StripByteCounts</TT>,
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<TT>XResolution</TT>,
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<TT>YResolution</TT>,
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Tiled Images</I></TD>
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<TD><TT>TileWidth</TT>,
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<TT>TileLength</TT>,
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<TT>TileOffsets</TT>,
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<TT>TileByteCounts</TT>
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</TD>
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</TR>
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<TD VALIGN=top><I>Image Colorimetry Information</I></TD>
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<TD><TT>WhitePoint</TT>,
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<TT>PrimaryChromaticities</TT>,
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<TT>TransferFunction</TT>,
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<TT>ReferenceBlackWhite</TT>
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Class B for bilevel images</I></TD>
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<TD><TT>SamplesPerPixel</TT> = 1<BR>
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<TT>BitsPerSample</TT> = 1<BR>
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<TT>Compression</TT> = 1 (none), 2 (CCITT 1D), or 32773 (PackBits)<BR>
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<TT>PhotometricInterpretation</TT> = 0 (Min-is-White), 1 (Min-is-Black)<BR>
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Class G for grayscale images</I></TD>
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<TD><TT>SamplesPerPixel</TT> = 1<BR>
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<TT>BitsPerSample</TT> = 4, 8<BR>
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<TT>Compression</TT> = 1 (none) 5 (LZW)<BR>
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<TT>PhotometricInterpretation</TT> = 0 (Min-is-White), 1 (Min-is-Black)<BR>
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Class P for palette color images</I></TD>
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<TD><TT>SamplesPerPixel</TT> = 1<BR>
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<TT>BitsPerSample</TT> = 1-8<BR>
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<TT>Compression</TT> = 1 (none) 5 (LZW)<BR>
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<TT>PhotometricInterpretation</TT> = 3 (Palette RGB)<BR>
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<TT>ColorMap</TT>
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Class R for RGB full color images</I></TD>
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<TD><TT>SamplesPerPixel</TT> = 3<BR>
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<TT>BitsPerSample</TT> = <8,8,8><BR>
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<TT>PlanarConfiguration</TT> = 1, 2<BR>
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<TT>Compression</TT> = 1 (none) 5 (LZW)<BR>
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<TT>PhotometricInterpretation</TT> = 2 (RGB)<BR>
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Class F for facsimile</I></TD>
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<TD>(<I>Class B tags plus...</I>)<BR>
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<TT>Compression</TT> = 3 (CCITT Group 3), 4 (CCITT Group 4)<BR>
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<TT>FillOrder</TT> = 1 (MSB), 2 (LSB)<BR>
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<TT>Group3Options</TT> = 1 (2d encoding), 4 (zero fill), 5 (2d+fill)<BR>
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<TT>ImageWidth</TT> = 1728, 2048, 2482<BR>
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<TT>NewSubFileType</TT> = 2<BR>
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<TT>ResolutionUnit</TT> = 2 (Inch), 3 (Centimeter)<BR>
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<TT>PageNumber</TT>,
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<TT>XResolution</TT>,
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<TT>YResolution</TT>,
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<TT>Software</TT>,
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<TT>BadFaxLines</TT>,
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<TT>CleanFaxData</TT>,
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<TT>ConsecutiveBadFaxLines</TT>,
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<TT>DateTime</TT>,
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<TT>DocumentName</TT>,
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<TT>ImageDescription</TT>,
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<TT>Orientation</TT>
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</TD>
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</TR>
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<TD VALIGN=top><I>Class S for separated images</I></TD>
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<TD><TT>SamplesPerPixel</TT> = 4<BR>
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<TT>PlanarConfiguration</TT> = 1, 2<BR>
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<TT>Compression</TT> = 1 (none), 5 (LZW)<BR>
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<TT>PhotometricInterpretation</TT> = 5 (Separated)<BR>
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<TT>InkSet</TT> = 1 (CMYK)<BR>
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<TT>DotRange</TT>,
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<TT>InkNames</TT>,
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<TT>DotRange</TT>,
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<TT>TargetPrinter</TT>
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</TD>
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</TR>
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<TD VALIGN=top><I>Class Y for YCbCr images</I></TD>
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<TD><TT>SamplesPerPixel</TT> = 3<BR>
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<TT>BitsPerSample</TT> = <8,8,8><BR>
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<TT>PlanarConfiguration</TT> = 1, 2<BR>
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<TT>Compression</TT> = 1 (none), 5 (LZW), 7 (JPEG)<BR>
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<TT>PhotometricInterpretation</TT> = 6 (YCbCr)<BR>
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<TT>YCbCrCoefficients</TT>,
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<TT>YCbCrSubsampling</TT>,
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<TT>YCbCrPositioning</TT><BR>
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(<I>colorimetry info from Appendix H; see above</I>)
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</TD>
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</TR>
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<TR>
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<TD VALIGN=top><I>Class "JPEG" for JPEG images (per TTN2)</I></TD>
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<TD><TT>PhotometricInterpretation</TT> = 1 (grayscale), 2 (RGB), 5 (CMYK), 6 (YCbCr)<BR>
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(<I>Class Y tags if YCbCr</I>)<BR>
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(<I>Class S tags if CMYK</I>)<BR>
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<TT>Compression</TT> = 7 (JPEG)<BR>
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</TD>
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</TR>
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</TABLE>
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<P>
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In addition, the library supports some optional compression algorithms
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that are, in some cases, of dubious value.
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<PRE>
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Compression = 32766 NeXT 2-bit encoding
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Compression = 32809 ThunderScan 4-bit encoding
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Compression = 32909 Pixar companded 11-bit ZIP encoding
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Compression = 32946 PKZIP-style Deflate encoding (experimental)
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Compression = 34676 SGI 32-bit Log Luminance encoding (experimental)
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Compression = 34677 SGI 24-bit Log Luminance encoding (experimental)
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</PRE>
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Note that there is no support for the JPEG-related tags defined
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in the 6.0 specification; the JPEG support is based on the post-6.0
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proposal given in TIFF Technical Note #2.
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<P>
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<TABLE>
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<TR>
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<TD VALIGN=top><IMG SRC="images/info.gif"></TD>
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<TD>
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<EM>
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For more information on the experimental Log Luminance encoding
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consult the materials available at
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<A HREF=http://www.sgi.com/Technology/pixformat>http://www.sgi.com/Technology/pixformat</A>.
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</EM>
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</TD>
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</TR>
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</TABLE>
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<P>
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The following table shows the tags that are recognized
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and how they are used by the library. If no use is indicated,
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then the library
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reads and writes the tag, but does not use it internally.
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<P>
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<TABLE BORDER WIDTH=100% CELLPADDING=2>
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<TR>
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<TH ALIGN=left>Tag Name</TH> <TH>Value</TH> <TH ALIGN=center>R/W</TH> <TH ALIGN=left>Library's Use (Comments)</TH>
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</TR>
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<TR>
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<TD><TT>NewSubFileType</TT></TD>
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<TD ALIGN=center>254</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>none (called <TT>SubFileType</TT> in <tiff.h>)</TD>
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</TR>
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<TR>
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<TD><TT>SubFileType</TT></TD>
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<TD ALIGN=center>255</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>none (called <TT>OSubFileType</TT> in <tiff.h>)</TD>
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</TR>
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<TR>
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<TD><TT>ImageWidth</TT></TD>
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<TD ALIGN=center>256</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>lots</TD>
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</TR>
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<TR>
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<TD><TT>ImageLength</TT></TD>
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<TD ALIGN=center>257</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>lots</TD>
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</TR>
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<TR>
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<TD><TT>BitsPerSample</TT></TD>
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<TD ALIGN=center>258</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>lots</TD>
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</TR>
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<TR>
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<TD><TT>Compression</TT></TD>
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<TD ALIGN=center>259</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>to select appropriate codec</TD>
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</TR>
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<TR>
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<TD><TT>PhotometricInterpretation</TT></TD>
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<TD ALIGN=center>262</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>lots</TD>
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</TR>
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<TR>
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<TD><TT>Thresholding</TT></TD>
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<TD ALIGN=center>263</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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<TR>
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<TD><TT>CellWidth</TT></TD>
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<TD ALIGN=center>264</TD>
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<TD> </TD>
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<TD>parsed but ignored</TD>
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</TR>
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<TR>
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<TD><TT>CellLength</TT></TD>
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<TD ALIGN=center>265</TD>
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<TD> </TD>
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<TD>parsed but ignored</TD>
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</TR>
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<TR>
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<TD><TT>FillOrder</TT></TD>
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<TD ALIGN=center>266</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>control bit order</TD>
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</TR>
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<TR>
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<TD><TT>DocumentName</TT></TD>
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<TD ALIGN=center>269</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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<TR>
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<TD><TT>ImageDescription</TT></TD>
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<TD ALIGN=center>270</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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<TR>
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<TD><TT>Make</TT></TD>
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<TD ALIGN=center>271</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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<TR>
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<TD><TT>Model</TT></TD>
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<TD ALIGN=center>272</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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<TR>
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<TD><TT>StripOffsets</TT></TD>
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<TD ALIGN=center>273</TD>
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<TD ALIGN=center>R/W</TD>
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<TD>data i/o</TD>
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</TR>
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<TR>
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<TD><TT>Orientation</TT></TD>
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<TD ALIGN=center>274</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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|
<TR>
|
|
|
|
|
<TD><TT>SamplesPerPixel</TT></TD>
|
|
|
|
|
<TD ALIGN=center>277</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>lots</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>RowsPerStrip</TT></TD>
|
|
|
|
|
<TD ALIGN=center>278</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>StripByteCounts</TT></TD>
|
|
|
|
|
<TD ALIGN=center>279</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>MinSampleValue</TT></TD>
|
|
|
|
|
<TD ALIGN=center>280</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>MaxSampleValue</TT></TD>
|
|
|
|
|
<TD ALIGN=center>281</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>XResolution</TT></TD>
|
|
|
|
|
<TD ALIGN=center>282</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>YResolution</TT></TD>
|
|
|
|
|
<TD ALIGN=center>283</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>used by Group 3 2d encoder</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>PlanarConfiguration</TT></TD>
|
|
|
|
|
<TD ALIGN=center>284</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>PageName</TT></TD>
|
|
|
|
|
<TD ALIGN=center>285</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>XPosition</TT></TD>
|
|
|
|
|
<TD ALIGN=center>286</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>YPosition</TT></TD>
|
|
|
|
|
<TD ALIGN=center>286</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>FreeOffsets</TT></TD>
|
|
|
|
|
<TD ALIGN=center>288</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
<TD>parsed but ignored</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>FreeByteCounts</TT></TD>
|
|
|
|
|
<TD ALIGN=center>289</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
<TD>parsed but ignored</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>GrayResponseUnit</TT></TD>
|
|
|
|
|
<TD ALIGN=center>290</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
<TD>parsed but ignored</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>GrayResponseCurve</TT></TD>
|
|
|
|
|
<TD ALIGN=center>291</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
<TD>parsed but ignored</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>Group3Options</TT></TD>
|
|
|
|
|
<TD ALIGN=center>292</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>used by Group 3 codec</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>Group4Options</TT></TD>
|
|
|
|
|
<TD ALIGN=center>293</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ResolutionUnit</TT></TD>
|
|
|
|
|
<TD ALIGN=center>296</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>used by Group 3 2d encoder</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>PageNumber</TT></TD>
|
|
|
|
|
<TD ALIGN=center>297</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ColorResponseUnit</TT></TD>
|
|
|
|
|
<TD ALIGN=center>300</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
<TD>parsed but ignored</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TransferFunction</TT></TD>
|
|
|
|
|
<TD ALIGN=center>301</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>Software</TT></TD>
|
|
|
|
|
<TD ALIGN=center>305</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>DateTime</TT></TD>
|
|
|
|
|
<TD ALIGN=center>306</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>Artist</TT></TD>
|
|
|
|
|
<TD ALIGN=center>315</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>HostComputer</TT></TD>
|
|
|
|
|
<TD ALIGN=center>316</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>Predictor</TT></TD>
|
|
|
|
|
<TD ALIGN=center>317</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>used by LZW codec</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>WhitePoint</TT></TD>
|
|
|
|
|
<TD ALIGN=center>318</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>PrimaryChromacities</TT></TD>
|
|
|
|
|
<TD ALIGN=center>319</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ColorMap</TT></TD>
|
|
|
|
|
<TD ALIGN=center>320</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TileWidth</TT></TD>
|
|
|
|
|
<TD ALIGN=center>322</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TileLength</TT></TD>
|
|
|
|
|
<TD ALIGN=center>323</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TileOffsets</TT></TD>
|
|
|
|
|
<TD ALIGN=center>324</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TileByteCounts</TT></TD>
|
|
|
|
|
<TD ALIGN=center>324</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>data i/o</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>BadFaxLines</TT></TD>
|
|
|
|
|
<TD ALIGN=center>326</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>CleanFaxData</TT></TD>
|
|
|
|
|
<TD ALIGN=center>327</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ConsecutiveBadFaxLines</TT></TD>
|
|
|
|
|
<TD ALIGN=center>328</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>SubIFD</TT></TD>
|
|
|
|
|
<TD ALIGN=center>330</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>subimage descriptor support</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>InkSet</TT></TD>
|
|
|
|
|
<TD ALIGN=center>332</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>InkNames</TT></TD>
|
|
|
|
|
<TD ALIGN=center>333</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>DotRange</TT></TD>
|
|
|
|
|
<TD ALIGN=center>336</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TargetPrinter</TT></TD>
|
|
|
|
|
<TD ALIGN=center>337</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ExtraSamples</TT></TD>
|
|
|
|
|
<TD ALIGN=center>338</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>lots</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>SampleFormat</TT></TD>
|
|
|
|
|
<TD ALIGN=center>339</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>SMinSampleValue</TT></TD>
|
|
|
|
|
<TD ALIGN=center>340</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>SMaxSampleValue</TT></TD>
|
|
|
|
|
<TD ALIGN=center>341</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>JPEGTables</TT></TD>
|
|
|
|
|
<TD ALIGN=center>347</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>used by JPEG codec</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>YCbCrCoefficients</TT></TD>
|
|
|
|
|
<TD ALIGN=center>529</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>used by <TT>TIFFReadRGBAImage</TT> support</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>YCbCrSubsampling</TT></TD>
|
|
|
|
|
<TD ALIGN=center>530</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>tile/strip size calculations</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>YCbCrPositioning</TT></TD>
|
|
|
|
|
<TD ALIGN=center>531</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ReferenceBlackWhite</TT></TD>
|
|
|
|
|
<TD ALIGN=center>532</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD> </TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>Matteing</TT></TD>
|
|
|
|
|
<TD ALIGN=center>32995</TD>
|
|
|
|
|
<TD ALIGN=center>R</TD>
|
|
|
|
|
<TD>none (obsoleted by <TT>ExtraSamples</TT> tag)</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>DataType</TT></TD>
|
|
|
|
|
<TD ALIGN=center>32996</TD>
|
|
|
|
|
<TD ALIGN=center>R</TD>
|
|
|
|
|
<TD>none (obsoleted by <TT>SampleFormat</TT> tag)</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>ImageDepth</TT></TD>
|
|
|
|
|
<TD ALIGN=center>32997</TD>
|
|
|
|
|
<TD ALIGN=center>R/W</TD>
|
|
|
|
|
<TD>tile/strip calculations</TD>
|
|
|
|
|
</TR>
|
|
|
|
|
<TR>
|
|
|
|
|
<TD><TT>TileDepth</TT></TD>
|
|
|
|
|
<TD ALIGN=center>32998</TD>
|
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<TD ALIGN=center>R/W</TD>
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<TD>tile/strip calculations</TD>
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</TR>
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<TR>
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<TD><TT>StoNits</TT></TD>
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<TD ALIGN=center>37439</TD>
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<TD ALIGN=center>R/W</TD>
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<TD> </TD>
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</TR>
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</TABLE>
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<P>
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The <TT>Matteing</TT> and <TT>DataType</TT>
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tags have been obsoleted by the 6.0
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<TT>ExtraSamples</TT> and <TT>SampleFormat</TT> tags.
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Consult the documentation on the
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<TT>ExtraSamples</TT> tag and Associated Alpha for elaboration. Note however
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that if you use Associated Alpha, you are expected to save data that is
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pre-multipled by Alpha. If this means nothing to you, check out
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Porter & Duff's paper in the '84 SIGGRAPH proceedings: "Compositing Digital
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Images".
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<P>
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The <TT>ImageDepth</TT>
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tag is a non-standard, but registered tag that specifies
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the Z-dimension of volumetric data. The combination of <TT>ImageWidth</TT>,
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<TT>ImageLength</TT>, and <TT>ImageDepth</TT>,
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defines a 3D volume of pixels that are
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further specified by <TT>BitsPerSample</TT> and
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<TT>SamplesPerPixel</TT>. The <TT>TileDepth</TT>
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tag (also non-standard, but registered) can be used to specified a
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subvolume "tiling" of a volume of data.
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<P>
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The Colorimetry, and CMYK tags are additions that appear in TIFF 6.0.
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Consult the TIFF 6.0 specification included in the <B>doc</B> directory
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and <A HREF=document.html>online</A>.
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<P>
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The JPEG-related tag is specified in
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<A HREF=ftp://ftp.sgi.com/graphics/tiff/TTN2.draft.txt.gz>TIFF Technical Note #2</A> which defines
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a revised JPEG-in-TIFF scheme (revised over that appendix that was
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part of the TIFF 6.0 specification).
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<P>
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<HR>
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<ADDRESS>
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<A HREF="sam.html">Sam Leffler</A> / <A HREF="mailto:sam@engr.sgi.com">sam@engr.sgi.com</A>.
|
1999-08-09 16:21:20 -04:00
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Last updated: $Date: 1999-08-09 20:21:21 $
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1999-07-27 17:50:26 -04:00
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</ADDRESS>
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</BODY>
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1999-08-09 16:21:20 -04:00
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<FONT FACE="Arial, Helvetica, Sans">
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1999-07-27 17:50:26 -04:00
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</HTML>
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