From 22f703cab05b7cd368f4de9e03991b7664dc5022 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 1 Sep 2014 13:56:46 +0200 Subject: Initial import of argyll version 1.5.1-8 --- tiff/html/support.html | 655 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 655 insertions(+) create mode 100644 tiff/html/support.html (limited to 'tiff/html/support.html') diff --git a/tiff/html/support.html b/tiff/html/support.html new file mode 100644 index 0000000..f6f5d60 --- /dev/null +++ b/tiff/html/support.html @@ -0,0 +1,655 @@ + + + + TIFF 6.0 Specification Coverage + + + + + + + + + + +

TIFF 6.0 Specification Coverage

+ The library is capable of dealing with images that are written to + follow the 5.0 or 6.0 TIFF spec. There is also considerable support + for some of the more esoteric portions of the 6.0 TIFF spec. +

+
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

Core requirements	+ + Both `"MM"` and `"II"` byte orders are handled. + Both packed and separated planar configuration of samples. + Any number of samples per pixel (memory permitting). + Any image width and height (memory permitting). + Multiple subfiles can be read and written. + Editing is not supported in that related subfiles (e.g. + a reduced resolution version of an image) are not automatically + updated. + + + Tags handled: `ExtraSamples`, `ImageWidth`, + `ImageLength`, `NewSubfileType`, `ResolutionUnit`. + `Rowsperstrip`, `StripOffsets`, `StripByteCounts`, + `XResolution`, `YResolution` + +
Tiled Images	`TileWidth`, `TileLength`, `TileOffsets`, + `TileByteCounts`
Image Colorimetry Information	`WhitePoint`, `PrimaryChromaticities`, `TransferFunction`, + `ReferenceBlackWhite`
Class B for bilevel images	`SamplesPerPixel` = 1 + `BitsPerSample` = 1 + `Compression` = 1 (none), 2 (CCITT 1D), or 32773 (PackBits) + `PhotometricInterpretation` = 0 (Min-is-White), 1 (Min-is-Black)
Class G for grayscale images	`SamplesPerPixel` = 1 + `BitsPerSample` = 4, 8 + `Compression` = 1 (none) 5 (LZW) + `PhotometricInterpretation` = 0 (Min-is-White), 1 (Min-is-Black)
Class P for palette color images	`SamplesPerPixel` = 1 + `BitsPerSample` = 1-8 + `Compression` = 1 (none) 5 (LZW) + `PhotometricInterpretation` = 3 (Palette RGB) + `ColorMap`
Class R for RGB full color images	`SamplesPerPixel` = 3 + `BitsPerSample` = <8,8,8> + `PlanarConfiguration` = 1, 2 + `Compression` = 1 (none) 5 (LZW) + `PhotometricInterpretation` = 2 (RGB)
Class F for facsimile	(Class B tags plus...) + `Compression` = 3 (CCITT Group 3), 4 (CCITT Group 4) + `FillOrder` = 1 (MSB), 2 (LSB) + `Group3Options` = 1 (2d encoding), 4 (zero fill), 5 (2d+fill) + `ImageWidth` = 1728, 2048, 2482 + `NewSubFileType` = 2 + `ResolutionUnit` = 2 (Inch), 3 (Centimeter) + `PageNumber`, + `XResolution`, + `YResolution`, + `Software`, + `BadFaxLines`, + `CleanFaxData`, + `ConsecutiveBadFaxLines`, + `DateTime`, + `DocumentName`, + `ImageDescription`, + `Orientation`
Class S for separated images	`SamplesPerPixel` = 4 + `PlanarConfiguration` = 1, 2 + `Compression` = 1 (none), 5 (LZW) + `PhotometricInterpretation` = 5 (Separated) + `InkSet` = 1 (CMYK) + `DotRange`, + `InkNames`, + `DotRange`, + `TargetPrinter`
Class Y for YCbCr images	`SamplesPerPixel` = 3 + `BitsPerSample` = <8,8,8> + `PlanarConfiguration` = 1, 2 + `Compression` = 1 (none), 5 (LZW), 7 (JPEG) + `PhotometricInterpretation` = 6 (YCbCr) + `YCbCrCoefficients`, + `YCbCrSubsampling`, + `YCbCrPositioning` + (colorimetry info from Appendix H; see above)
Class "JPEG" for JPEG images (per TTN2)	`PhotometricInterpretation` = 1 (grayscale), 2 (RGB), 5 (CMYK), 6 (YCbCr) + (Class Y tags if YCbCr) + (Class S tags if CMYK) + `Compression` = 7 (JPEG)

+ In addition, the library supports some optional compression algorithms + that are, in some cases, of dubious value. +

+ + + + + + + + +

Compression tag value	Compression algorithm
32766	NeXT 2-bit encoding
32809	ThunderScan 4-bit encoding
32909	Pixar companded 11-bit ZIP encoding
32946	PKZIP-style Deflate encoding (experimental)
34676	SGI 32-bit Log Luminance encoding (experimental)
34677	SGI 24-bit Log Luminance encoding (experimental)

+
+

+ Note that there is no support for the JPEG-related tags defined + in the 6.0 specification; the JPEG support is based on the post-6.0 + proposal given in TIFF Technical Note #2. +

+ + + + + +

For more information on the experimental Log Luminance encoding + consult the materials available at + http://www.anyhere.com/gward/pixformat/tiffluv.html.

+
+

+ The following table shows the tags that are recognized + and how they are used by the library. If no use is indicated, + then the library reads and writes the tag, but does not use it internally. +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

Tag Name	Value	R/W	Library's Use (Comments)
`NewSubFileType`	254	R/W	none (called `SubFileType` in <tiff.h>)
`SubFileType`	255	R/W	none (called `OSubFileType` in <tiff.h>)
`ImageWidth`	256	R/W	lots
`ImageLength`	257	R/W	lots
`BitsPerSample`	258	R/W	lots
`Compression`	259	R/W	to select appropriate codec
`PhotometricInterpretation`	262	R/W	lots
`Thresholding`	263	R/W
`CellWidth`	264		parsed but ignored
`CellLength`	265		parsed but ignored
`FillOrder`	266	R/W	control bit order
`DocumentName`	269	R/W
`ImageDescription`	270	R/W
`Make`	271	R/W
`Model`	272	R/W
`StripOffsets`	273	R/W	data i/o
`Orientation`	274	R/W
`SamplesPerPixel`	277	R/W	lots
`RowsPerStrip`	278	R/W	data i/o
`StripByteCounts`	279	R/W	data i/o
`MinSampleValue`	280	R/W
`MaxSampleValue`	281	R/W
`XResolution`	282	R/W
`YResolution`	283	R/W	used by Group 3 2d encoder
`PlanarConfiguration`	284	R/W	data i/o
`PageName`	285	R/W
`XPosition`	286	R/W
`YPosition`	286	R/W
`FreeOffsets`	288		parsed but ignored
`FreeByteCounts`	289		parsed but ignored
`GrayResponseUnit`	290		parsed but ignored
`GrayResponseCurve`	291		parsed but ignored
`Group3Options`	292	R/W	used by Group 3 codec
`Group4Options`	293	R/W
`ResolutionUnit`	296	R/W	used by Group 3 2d encoder
`PageNumber`	297	R/W
`ColorResponseUnit`	300		parsed but ignored
`TransferFunction`	301	R/W
`Software`	305	R/W
`DateTime`	306	R/W
`Artist`	315	R/W
`HostComputer`	316	R/W
`Predictor`	317	R/W	used by LZW codec
`WhitePoint`	318	R/W
`PrimaryChromacities`	319	R/W
`ColorMap`	320	R/W
`TileWidth`	322	R/W	data i/o
`TileLength`	323	R/W	data i/o
`TileOffsets`	324	R/W	data i/o
`TileByteCounts`	324	R/W	data i/o
`BadFaxLines`	326	R/W
`CleanFaxData`	327	R/W
`ConsecutiveBadFaxLines`	328	R/W
`SubIFD`	330	R/W	subimage descriptor support
`InkSet`	332	R/W
`InkNames`	333	R/W
`DotRange`	336	R/W
`TargetPrinter`	337	R/W
`ExtraSamples`	338	R/W	lots
`SampleFormat`	339	R/W
`SMinSampleValue`	340	R/W
`SMaxSampleValue`	341	R/W
`JPEGTables`	347	R/W	used by JPEG codec
`YCbCrCoefficients`	529	R/W	used by `TIFFReadRGBAImage` support
`YCbCrSubsampling`	530	R/W	tile/strip size calculations
`YCbCrPositioning`	531	R/W
`ReferenceBlackWhite`	532	R/W
`Matteing`	32995	R	none (obsoleted by `ExtraSamples` tag)
`DataType`	32996	R	none (obsoleted by `SampleFormat` tag)
`ImageDepth`	32997	R/W	tile/strip calculations
`TileDepth`	32998	R/W	tile/strip calculations
`StoNits`	37439	R/W

+ The Matteing and DataType + tags have been obsoleted by the 6.0 + ExtraSamples and SampleFormat tags. + Consult the documentation on the + ExtraSamples tag and Associated Alpha for elaboration. Note however + that if you use Associated Alpha, you are expected to save data that is + pre-multipled by Alpha. If this means nothing to you, check out + Porter & Duff's paper in the '84 SIGGRAPH proceedings: "Compositing Digital + Images". +

+ The ImageDepth + tag is a non-standard, but registered tag that specifies + the Z-dimension of volumetric data. The combination of ImageWidth, + ImageLength, and ImageDepth, + defines a 3D volume of pixels that are + further specified by BitsPerSample and + SamplesPerPixel. The TileDepth + tag (also non-standard, but registered) can be used to specified a + subvolume "tiling" of a volume of data. +

+ The Colorimetry, and CMYK tags are additions that appear in TIFF 6.0. + Consult the TIFF 6.0 specification included in the doc directory + and online. +

+ The JPEG-related tag is specified in + TIFF Technical Note #2 which defines + a revised JPEG-in-TIFF scheme (revised over that appendix that was + part of the TIFF 6.0 specification). +

+ Last updated: $Date: 2005/12/28 06:53:18 $ +

+ + + -- cgit v1.2.3