TIFF 6.0 Specification
Final—June 3, 1992
BitsPerSample
Number of bits per component.
Tag
= 258 (102.H)
Type = SHORT
N
= SamplesPerPixel
Note that this field allows a different number of bits per component for each
component corresponding to a pixel. For example, RGB color data could use a
different number of bits per component for each of the three color planes. Most RGB
files will have the same number of BitsPerSample for each component. Even in this
case, the writer must write all three values.
Default = 1. See also SamplesPerPixel.
CellLength
The length of the dithering or halftoning matrix used to create a dithered or
halftoned bilevel file.
Tag
= 265 (109.H)
Type = SHORT
N
=1
This field should only be present if Threshholding = 2
No default. See also Threshholding.
CellWidth
The width of the dithering or halftoning matrix used to create a dithered or
halftoned bilevel file.Tag = 264 (108.H)
Type = SHORT
N
=1
No default. See also Threshholding.
ColorMap
A color map for palette color images.
Tag
= 320 (140.H)
Type = SHORT
N
= 3 * (2**BitsPerSample)
This field defines a Red-Green-Blue color map (often called a lookup table) for
palette-color images. In a palette-color image, a pixel value is used to index into
an RGB lookup table. For example, a palette-color pixel having a value of 0
would be displayed according to the 0th Red, Green, Blue triplet.
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