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authorJörg Frings-Fürst <debian@jff-webhosting.net>2015-08-23 12:17:05 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2015-08-23 12:17:05 +0200
commitc0b89ac5bfb90835ef01573267020e42d4fe070c (patch)
tree733c16852d964d84b7565af4bdaff0bcca901b88 /tiff/html/support.html
parent094535c010320967639e8e86f974d878e80baa72 (diff)
Imported Upstream version 1.8.0upstream/1.8.0
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-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<html lang="en">
-<head>
- <title>TIFF 6.0 Specification Coverage</title>
- <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
- <meta http-equiv="content-language" content="en">
- <style type="text/css">
- <!--
- th {text-align: left; vertical-align: top; font-style: italic; font-weight: normal}
- -->
- </style>
-</head>
-<body lang="en" text="#000000" bgcolor="#ffffff" link="#0000ff" alink="#0000ff" vlink="#0000ff">
- <table border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td style="padding-left: 1em; padding-right: 1em"><img src="images/strike.gif" width="128" height="100" alt=""></td>
- <td>
- <h1>TIFF 6.0 Specification Coverage</h1>
- <p>
- 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.
- </p>
- </td>
- </tr>
- </table>
- <br>
- <table border="1" cellspacing="0" cellpadding="5">
- <tr>
- <th>Core requirements</th>
- <td>
- <p>
- Both <tt>"MM"</tt> and <tt>"II"</tt> 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 <b>not</b> supported in that related subfiles (e.g.
- a reduced resolution version of an image) are not automatically
- updated.
- </p>
- <p>
- Tags handled: <tt>ExtraSamples</tt>, <tt>ImageWidth</tt>,
- <tt>ImageLength</tt>, <tt>NewSubfileType</tt>, <tt>ResolutionUnit</tt>.
- <tt>Rowsperstrip</tt>, <tt>StripOffsets</tt>, <tt>StripByteCounts</tt>,
- <tt>XResolution</tt>, <tt>YResolution</tt>
- </p>
- </td>
- </tr>
- <tr>
- <th>Tiled Images</th>
- <td><tt>TileWidth</tt>, <tt>TileLength</tt>, <tt>TileOffsets</tt>,
- <tt>TileByteCounts</tt></td>
- </tr>
- <tr>
- <th>Image Colorimetry Information</th>
- <td><tt>WhitePoint</tt>, <tt>PrimaryChromaticities</tt>, <tt>TransferFunction</tt>,
- <tt>ReferenceBlackWhite</tt></td>
- </tr>
- <tr>
- <th>Class B for bilevel images</th>
- <td><tt>SamplesPerPixel</tt> = 1<br>
- <tt>BitsPerSample</tt> = 1<br>
- <tt>Compression</tt> = 1 (none), 2 (CCITT 1D), or 32773 (PackBits)<br>
- <tt>PhotometricInterpretation</tt> = 0 (Min-is-White), 1 (Min-is-Black)</td>
- </tr>
- <tr>
- <th>Class G for grayscale images</th>
- <td><tt>SamplesPerPixel</tt> = 1<br>
- <tt>BitsPerSample</tt> = 4, 8<br>
- <tt>Compression</tt> = 1 (none) 5 (LZW)<br>
- <tt>PhotometricInterpretation</tt> = 0 (Min-is-White), 1 (Min-is-Black)</td>
- </tr>
- <tr>
- <th>Class P for palette color images</th>
- <td><tt>SamplesPerPixel</tt> = 1<br>
- <tt>BitsPerSample</tt> = 1-8<br>
- <tt>Compression</tt> = 1 (none) 5 (LZW)<br>
- <tt>PhotometricInterpretation</tt> = 3 (Palette RGB)<br>
- <tt>ColorMap</tt></td>
- </tr>
- <tr>
- <th>Class R for RGB full color images</th>
- <td><tt>SamplesPerPixel</tt> = 3<br>
- <tt>BitsPerSample</tt> = &lt;8,8,8&gt;<br>
- <tt>PlanarConfiguration</tt> = 1, 2<br>
- <tt>Compression</tt> = 1 (none) 5 (LZW)<br>
- <tt>PhotometricInterpretation</tt> = 2 (RGB)</td>
- </tr>
- <tr>
- <th>Class F for facsimile</th>
- <td>(<i>Class B tags plus...</i>)<br>
- <tt>Compression</tt> = 3 (CCITT Group 3), 4 (CCITT Group 4)<br>
- <tt>FillOrder</tt> = 1 (MSB), 2 (LSB)<br>
- <tt>Group3Options</tt> = 1 (2d encoding), 4 (zero fill), 5 (2d+fill)<br>
- <tt>ImageWidth</tt> = 1728, 2048, 2482<br>
- <tt>NewSubFileType</tt> = 2<br>
- <tt>ResolutionUnit</tt> = 2 (Inch), 3 (Centimeter)<br>
- <tt>PageNumber</tt>,
- <tt>XResolution</tt>,
- <tt>YResolution</tt>,
- <tt>Software</tt>,
- <tt>BadFaxLines</tt>,
- <tt>CleanFaxData</tt>,
- <tt>ConsecutiveBadFaxLines</tt>,
- <tt>DateTime</tt>,
- <tt>DocumentName</tt>,
- <tt>ImageDescription</tt>,
- <tt>Orientation</tt></td>
- </tr>
- <tr>
- <th>Class S for separated images</th>
- <td><tt>SamplesPerPixel</tt> = 4<br>
- <tt>PlanarConfiguration</tt> = 1, 2<br>
- <tt>Compression</tt> = 1 (none), 5 (LZW)<br>
- <tt>PhotometricInterpretation</tt> = 5 (Separated)<br>
- <tt>InkSet</tt> = 1 (CMYK)<br>
- <tt>DotRange</tt>,
- <tt>InkNames</tt>,
- <tt>DotRange</tt>,
- <tt>TargetPrinter</tt></td>
- </tr>
- <tr>
- <th>Class Y for YCbCr images</th>
- <td><tt>SamplesPerPixel</tt> = 3<br>
- <tt>BitsPerSample</tt> = &lt;8,8,8&gt;<br>
- <tt>PlanarConfiguration</tt> = 1, 2<br>
- <tt>Compression</tt> = 1 (none), 5 (LZW), 7 (JPEG)<br>
- <tt>PhotometricInterpretation</tt> = 6 (YCbCr)<br>
- <tt>YCbCrCoefficients</tt>,
- <tt>YCbCrSubsampling</tt>,
- <tt>YCbCrPositioning</tt><br>
- (<i>colorimetry info from Appendix H; see above</i>)</td>
- </tr>
- <tr>
- <th>Class "JPEG" for JPEG images (per TTN2)</th>
- <td><tt>PhotometricInterpretation</tt> = 1 (grayscale), 2 (RGB), 5 (CMYK), 6 (YCbCr)<br>
- (<i>Class Y tags if YCbCr</i>)<br>
- (<i>Class S tags if CMYK</i>)<br>
- <tt>Compression</tt> = 7 (JPEG)</td>
- </tr>
- </table>
- <p>
- In addition, the library supports some optional compression algorithms
- that are, in some cases, of dubious value.
- </p>
- <table border="0" cellspacing="0" cellpadding="2">
- <tr><th>Compression tag value</th><th>Compression algorithm</th></tr>
- <tr><td>32766</td><td>NeXT 2-bit encoding</td></tr>
- <tr><td>32809</td><td>ThunderScan 4-bit encoding</td></tr>
- <tr><td>32909</td><td>Pixar companded 11-bit ZIP encoding</td></tr>
- <tr><td>32946</td><td>PKZIP-style Deflate encoding (experimental)</td></tr>
- <tr><td>34676</td><td>SGI 32-bit Log Luminance encoding (experimental)</td></tr>
- <tr><td>34677</td><td>SGI 24-bit Log Luminance encoding (experimental)</td></tr>
- </table>
- <br>
- <p>
- 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.
- </p>
- <table>
- <tr>
- <td valign=top><img src="images/info.gif" width="32" height="32" alt=""></td>
- <td>For more information on the experimental Log Luminance encoding
- consult the materials available at
- <a href="http://www.anyhere.com/gward/pixformat/tiffluv.html">http://www.anyhere.com/gward/pixformat/tiffluv.html</a>.</td>
- </tr>
- </table>
- <br>
- <p>
- 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.
- </p>
- <table border="1" cellspacing="0" cellpadding="5">
- <tr>
- <th>Tag Name</th>
- <th>Value</th>
- <th>R/W</th>
- <th>Library's Use (Comments)</th>
- </tr>
- <tr>
- <td><tt>NewSubFileType</tt></td>
- <td>254</td>
- <td>R/W</td>
- <td>none (called <tt>SubFileType</tt> in &lt;tiff.h&gt;)</td>
- </tr>
- <tr>
- <td><tt>SubFileType</tt></td>
- <td>255</td>
- <td>R/W</td>
- <td>none (called <tt>OSubFileType</tt> in &lt;tiff.h&gt;)</td>
- </tr>
- <tr>
- <td><tt>ImageWidth</tt></td>
- <td>256</td>
- <td>R/W</td>
- <td>lots</td>
- </tr>
- <tr>
- <td><tt>ImageLength</tt></td>
- <td>257</td>
- <td>R/W</td>
- <td>lots</td>
- </tr>
- <tr>
- <td><tt>BitsPerSample</tt></td>
- <td>258</td>
- <td>R/W</td>
- <td>lots</td>
- </tr>
- <tr>
- <td><tt>Compression</tt></td>
- <td>259</td>
- <td>R/W</td>
- <td>to select appropriate codec</td>
- </tr>
- <tr>
- <td><tt>PhotometricInterpretation</tt></td>
- <td>262</td>
- <td>R/W</td>
- <td>lots</td>
- </tr>
- <tr>
- <td><tt>Thresholding</tt></td>
- <td>263</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>CellWidth</tt></td>
- <td>264</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>CellLength</tt></td>
- <td>265</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>FillOrder</tt></td>
- <td>266</td>
- <td>R/W</td>
- <td>control bit order</td>
- </tr>
- <tr>
- <td><tt>DocumentName</tt></td>
- <td>269</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ImageDescription</tt></td>
- <td>270</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>Make</tt></td>
- <td>271</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>Model</tt></td>
- <td>272</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>StripOffsets</tt></td>
- <td>273</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>Orientation</tt></td>
- <td>274</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>SamplesPerPixel</tt></td>
- <td>277</td>
- <td>R/W</td>
- <td>lots</td>
- </tr>
- <tr>
- <td><tt>RowsPerStrip</tt></td>
- <td>278</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>StripByteCounts</tt></td>
- <td>279</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>MinSampleValue</tt></td>
- <td>280</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>MaxSampleValue</tt></td>
- <td>281</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>XResolution</tt></td>
- <td>282</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>YResolution</tt></td>
- <td>283</td>
- <td>R/W</td>
- <td>used by Group 3 2d encoder</td>
- </tr>
- <tr>
- <td><tt>PlanarConfiguration</tt></td>
- <td>284</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>PageName</tt></td>
- <td>285</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>XPosition</tt></td>
- <td>286</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>YPosition</tt></td>
- <td>286</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>FreeOffsets</tt></td>
- <td>288</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>FreeByteCounts</tt></td>
- <td>289</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>GrayResponseUnit</tt></td>
- <td>290</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>GrayResponseCurve</tt></td>
- <td>291</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>Group3Options</tt></td>
- <td>292</td>
- <td>R/W</td>
- <td>used by Group 3 codec</td>
- </tr>
- <tr>
- <td><tt>Group4Options</tt></td>
- <td>293</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ResolutionUnit</tt></td>
- <td>296</td>
- <td>R/W</td>
- <td>used by Group 3 2d encoder</td>
- </tr>
- <tr>
- <td><tt>PageNumber</tt></td>
- <td>297</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ColorResponseUnit</tt></td>
- <td>300</td>
- <td>&nbsp;</td>
- <td>parsed but ignored</td>
- </tr>
- <tr>
- <td><tt>TransferFunction</tt></td>
- <td>301</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>Software</tt></td>
- <td>305</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>DateTime</tt></td>
- <td>306</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>Artist</tt></td>
- <td>315</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>HostComputer</tt></td>
- <td>316</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>Predictor</tt></td>
- <td>317</td>
- <td>R/W</td>
- <td>used by LZW codec</td>
- </tr>
- <tr>
- <td><tt>WhitePoint</tt></td>
- <td>318</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>PrimaryChromacities</tt></td>
- <td>319</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ColorMap</tt></td>
- <td>320</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>TileWidth</tt></td>
- <td>322</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>TileLength</tt></td>
- <td>323</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>TileOffsets</tt></td>
- <td>324</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>TileByteCounts</tt></td>
- <td>324</td>
- <td>R/W</td>
- <td>data i/o</td>
- </tr>
- <tr>
- <td><tt>BadFaxLines</tt></td>
- <td>326</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>CleanFaxData</tt></td>
- <td>327</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ConsecutiveBadFaxLines</tt></td>
- <td>328</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>SubIFD</tt></td>
- <td>330</td>
- <td>R/W</td>
- <td>subimage descriptor support</td>
- </tr>
- <tr>
- <td><tt>InkSet</tt></td>
- <td>332</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>InkNames</tt></td>
- <td>333</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>DotRange</tt></td>
- <td>336</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>TargetPrinter</tt></td>
- <td>337</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ExtraSamples</tt></td>
- <td>338</td>
- <td>R/W</td>
- <td>lots</td>
- </tr>
- <tr>
- <td><tt>SampleFormat</tt></td>
- <td>339</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>SMinSampleValue</tt></td>
- <td>340</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>SMaxSampleValue</tt></td>
- <td>341</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>JPEGTables</tt></td>
- <td>347</td>
- <td>R/W</td>
- <td>used by JPEG codec</td>
- </tr>
- <tr>
- <td><tt>YCbCrCoefficients</tt></td>
- <td>529</td>
- <td>R/W</td>
- <td>used by <tt>TIFFReadRGBAImage</tt> support</td>
- </tr>
- <tr>
- <td><tt>YCbCrSubsampling</tt></td>
- <td>530</td>
- <td>R/W</td>
- <td>tile/strip size calculations</td>
- </tr>
- <tr>
- <td><tt>YCbCrPositioning</tt></td>
- <td>531</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>ReferenceBlackWhite</tt></td>
- <td>532</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- <tr>
- <td><tt>Matteing</tt></td>
- <td>32995</td>
- <td>R</td>
- <td>none (obsoleted by <tt>ExtraSamples</tt> tag)</td>
- </tr>
- <tr>
- <td><tt>DataType</tt></td>
- <td>32996</td>
- <td>R</td>
- <td>none (obsoleted by <tt>SampleFormat</tt> tag)</td>
- </tr>
- <tr>
- <td><tt>ImageDepth</tt></td>
- <td>32997</td>
- <td>R/W</td>
- <td>tile/strip calculations</td>
- </tr>
- <tr>
- <td><tt>TileDepth</tt></td>
- <td>32998</td>
- <td>R/W</td>
- <td>tile/strip calculations</td>
- </tr>
- <tr>
- <td><tt>StoNits</tt></td>
- <td>37439</td>
- <td>R/W</td>
- <td>&nbsp;</td>
- </tr>
- </table>
- <p>
- The <tt>Matteing</tt> and <tt>DataType</tt>
- tags have been obsoleted by the 6.0
- <tt>ExtraSamples</tt> and <tt>SampleFormat</tt> tags.
- Consult the documentation on the
- <tt>ExtraSamples</tt> 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 &amp; Duff's paper in the '84 SIGGRAPH proceedings: "Compositing Digital
- Images".
- </p>
- <p>
- The <tt>ImageDepth</tt>
- tag is a non-standard, but registered tag that specifies
- the Z-dimension of volumetric data. The combination of <tt>ImageWidth</tt>,
- <tt>ImageLength</tt>, and <tt>ImageDepth</tt>,
- defines a 3D volume of pixels that are
- further specified by <tt>BitsPerSample</tt> and
- <tt>SamplesPerPixel</tt>. The <tt>TileDepth</tt>
- tag (also non-standard, but registered) can be used to specified a
- subvolume "tiling" of a volume of data.
- </p>
- <p>
- The Colorimetry, and CMYK tags are additions that appear in TIFF 6.0.
- Consult the TIFF 6.0 specification included in the <b>doc</b> directory
- and <a href="document.html">online</a>.
- </p>
- <p>
- The JPEG-related tag is specified in
- <a href="TIFFTechNote2.html">TIFF Technical Note #2</a> which defines
- a revised JPEG-in-TIFF scheme (revised over that appendix that was
- part of the TIFF 6.0 specification).
- </p>
- <hr>
- <p>
- Last updated: $Date: 2005/12/28 06:53:18 $
- </p>
-</body>
-</html>
-