TIFF Tag Reference
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TIFF Tag YCbCrPositioning
| IFD | | Image |
|---|---|---|
| Code | 531 (hex 0x0213) | |
| Name | YCbCrPositioning | |
| LibTiff name | TIFFTAG_YCBCRPOSITIONING | |
| Type | SHORT | |
| Count | 1 | |
| Default | 1 (centered) |
Description
Specifies the positioning of subsampled chrominance components relative to luminance samples.
The specification defines these values:
1 = centered
2 = cosited
LibTiff defines these values:
YCBCRPOSITION_CENTERED = 1;
YCBCRPOSITION_COSITED = 2;
Field value 1 (centered) must be specified for compatibility with industry standards such as PostScript Level 2 and QuickTime. Field value 2 (cosited) must be specified for compatibility with most digital video standards, such as CCIR Recommendation 601-1.
The TIFF-F specification (RFC 2301) renames this tag to 'ChromaPositioning' to reflect extended applicability to other color spaces.
Related tags
YCbCrCoefficients
YCbCrSubSampling
See also
TIFF Specification, revision 6.0, page 92
RFC 2301 - File Format for Internet Fax