HP (Hewlett-Packard) PCL Printer User Manual


 
D-4 Modifying Output Color (Color LaserJet, 5, 5M, DeskJet) EN
Snap to Primaries
This algorithm converts each component of a color specification to its
corresponding primary color. For example, assuming 8 bits per
primary, an RGB input value greater than 128 snaps to 255; a value
less than or equal to 128 snaps to 0.
Snap Black to White, Colors to Black
Choosing this option converts black to white and all other colors to
black. Input primary colors equal to a black specification are
converted to a white specification, and other color specifications for
the input primaries are converted to the black specification.
Device Best Dither
This dither pattern produces the best results for many images. Note,
however, that the recommended dither pattern varies with the image,
the intended use of the image, and the subjective judgements of the
user.
Error Diffusion
The input primaries of a given pixel (x,y) are printed at the closest
density available and the local error is propagated to the unprinted
neighboring pixels. Error diffusion applies only to raster data printed
using the Configure Image Data command.
16 - Monochrome continuous tone detail 300 lpi
17 - Monochrome continuous tone smooth 150 lpi
18 - Continuous tone basic 100 lpi
19 - Monochrome continuous tone basic 100 lpi
Default =3
Range = 0 to 19 (invalid values are ignored; values 1, 2, 9, and
10 are ignored for device independent color)