lab2uint8 - Convert L*a*b* data to uint8

Syntax

lab8 = lab2uint8(lab)

Description

lab8 = lab2uint8(lab) converts an M-by-3 or M-by-N-by-3 array of color values to uint8. lab8 has the same size as lab.

The Image Processing Toolbox software follows the convention that double-precision arrays contain 1976 CIE values. arrays that are uint8 or uint16 follow the convention in the ICC profile specification (ICC.1:2001-4, www.color.org) for representing values as unsigned 8-bit or 16-bit integers. The ICC encoding convention is illustrated by these tables.

Value (L*)	uint8 Value	uint16 Value
0.0	0	0
100.0	255	65280
100.0 + (25500/65280)	None	65535

Value (a* or b*)	uint8 Value	uint16 Value
-128.0	0	0
0.0	128	32768
127.0	255	65280
127.0 + (255/256)	None	65535

Class Support

lab is a uint8, uint16, or double array that must be real and nonsparse. lab8 is uint8.

Examples

Convert full intensity neutral color (white) from double to uint8.

lab2uint8([100 0 0])
ans =

   255   128   128

See Also

applycform | lab2double | lab2uint16 | makecform | whitepoint | xyz2double | xyz2uint16

How To

• Color Space Conversions

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