TIFF Tag Threshholding
| IFD | Image |
|---|---|
| Code | 263 (hex 0x0107) |
| Name | Threshholding |
| LibTiff name | TIFFTAG_THRESHHOLDING |
| Type | SHORT |
| Count | 1 |
| Default | 1 (No dithering) |
Description
For black and white TIFF files that represent shades of gray, the technique used to convert from gray to black and white pixels.
The specification defines these values:
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.
LibTiff defines these values:
THRESHHOLD_BILEVEL = 1;
THRESHHOLD_HALFTONE = 2;
THRESHHOLD_ERRORDIFFUSE = 3;