lab2uint16

Convert L*a*b color values to uint16

Syntax

lab16 = lab2uint16(lab)

Description

lab16 = lab2uint16(lab) converts L*a*b* color values to type uint16.

Examples

Convert L*a*b* Color Values to uint16

This example shows how to convert L*a*b* color values from double to uint16.

Create a double vector specifying the color white in L*a*b* colorspace.

w = [100 0 0];

Convert the L*a*b* color value to uint16.

lab2uint16(w)

ans = 1x3 uint16 row vector

   65280   32768   32768

Input Arguments

lab — Color values to convert

m-by-3 numeric matrix | m-by-n-by-3 numeric array

Color values to convert, specified as a m-by-3 numeric matrix of color values (one color per row), or an m-by-n-by-3 numeric array.

Data Types: double | uint8

Output Arguments

lab16 — Converted color values

numeric array

Converted color values, returned as a numeric array of same size as the input.

Data Types: uint16

Algorithms

The function converts the L*a*b* color values to type uint16. The Image Processing Toolbox™ software follows the convention that double-precision L*a*b* arrays contain 1976 CIE L*a*b* values. The L*a*b* arrays that are uint8 or uint16 follow the convention in the ICC profile specification (ICC.1:2001-4, www.color.org) for representing L*a*b* 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

Version History

Introduced before R2006a