HP L 5 manual Colorimetric RGB Long Form, Sign Exponent Fractional Portion

FLOATING POINT FORMAT

The following format is used for device-independent color floating point specifications:

31	30	23	22	0
Sign		Exponent		Fractional Portion

The above single-precision, 32-bit floating point specification is fully compliant with the IEEE Floating Point Formats.

Colorimetric RGB (Long Form)

The long form for Colorimetric RGB allows specifications other than the default non-linear SMPTE RGB with a 2.2 gamma and 1.0 gain. Each RGB primary and the white point is specified in the CID data field by chromaticity coordinates (CIE xy). The tristimulus luminance Y value of the white point is assumed to be 100% and is therefore not specified. For color spaces that are linear transformations from CIE XYZ tristimulus coordinates, gamma and gain are set to 1.0; otherwise they are set appropriately. Colorimetric RGB spaces can be used for any monitor having primaries specified as CIE xy chromaticity coordinates with white point, such as the Sony Trinitron or Hitachi Color Monitor.

Byte	15 (msb)	8	7	(lsb) 0	Byte
0	Color space		Pixel encoding mode		1
2	Bits per Index		Bits per primary #1		3
4	Bits per primary #2		Bits per primary #3		5
6	x Chromaticity for red primary (msw)				7
8	x Chromaticity for red primary (lsw)				9
10	y Chromaticity for red primary (msw)				11
12	y Chromaticity for red primary (lsw)				13
14	x Chromaticity for green primary (msw)				15
16	x Chromaticity for green primary (lsw)				17
18	y Chromaticity for green primary (msw)				19
20	y Chromaticity for green primary (lsw)				21

B-20 Using Color Modes (Color LaserJet, 5, 5M, DeskJet) EN