HP L Ordered Dither and Clustered Ordered Dither, Monochrome Rendering, User-Defined Dithering

Ordered Dither and Clustered Ordered Dither

The ordered dither or cluster ordered dither causes a pixel to be intensified at a point (x,y) depending on the desired intensity, I(x,y), and on an n x n dither matrix, D, where:

i = x modulo n j = y modulo n

For RGB color spaces, if I(x,y) < D(i, j), the point corresponding to (x,y) is intensified; otherwise it is not. The intensity of each primary color is determined according to this scheme. The relationship between I and D depends on the specified color space.

Monochrome Rendering

Monochrome rendering generates a gray value from the three primary colors. The gray value is computed according to the NTSC standard, which for the Device RGB color space is:

Gray = 0.3 x Red 0.59 x Green 0.11 x Blue

	User-Defined Dithering
	For a user-defined dither, the input primaries are compared against
	differently dimensioned dithers (e.g. MxN), which may vary for each
	primary color.
Note	Render algorithms 1, 2, 9 and 10 are not accessible when in a
	device-independent color space because it is impossible to
	characterize a printer for all possible dither algorithms. If one of these
	render algorithms is selected when in a device-independent color
	space, the device best dither algorithm will be used instead.
	HP Color LaserJet 5 and 5M printers do not support user-defined
	dithering.

EN Modifying Output Color (Color LaserJet, 5, 5M, DeskJet) D-5