TIFF 6.0 Specification
Final—June 3, 1992
Currently defined values are:
1 = full-resolution image data
2 = reduced-resolution image data
3 = a single page of a multi-page image (see the PageNumber field description).
Note that several image types may be found in a single TIFF file, with each subfile
described by its own IFD.
No default.
This field is deprecated. The NewSubfileType field should be used instead.
Threshholding
For black and white TIFF files that represent shades of gray, the technique used to
convert from gray to black and white pixels.
Tag
= 263 (107.H)
Type = SHORT
N
=1
1 = No dithering or halftoning has been applied to the image data.
2 = An ordered dither or halftone technique has been applied to the image data.
3 = A randomized process such as error diffusion has been applied to the image data.
Default is Threshholding = 1. See also CellWidth, CellLength.
XResolution
The number of pixels per ResolutionUnit in the ImageWidth direction.
Tag
= 282 (11A.H)
Type = RATIONAL
N
=1
It is not mandatory that the image be actually displayed or printed at the size implied
by this parameter. It is up to the application to use this information as it wishes.
No default. See also YResolution, ResolutionUnit.
YResolution
The number of pixels per ResolutionUnit in the ImageLength direction.
Tag
= 283 (11B.H)
Type = RATIONAL
N
=1
No default. See also XResolution, ResolutionUnit.
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