This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

lab2uint16

Convert L*a*b color values to uint16

Syntax

lab16 = lab2uint16(lab)

Description

example

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

Examples

collapse all

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

collapse all

Color values to convert, specified as a m-by-3 matrix of color values (one color per row), or an m-by-n-by-3 image array. The input lab matrix must be real and nonsparse.

Data Types: double | uint8

Output Arguments

collapse all

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

Introduced before R2006a