Image Processing Toolbox User's Guide

whitepoint

Return values of standard illuminants

Syntax

• xyz = whitepoint
  xyz = whitepoint(string)
  

Description

xyz = whitepoint(string) returns xyz, a three-element row vector of values scaled so that Y = 1. string specifies the white reference illuminant. The following table lists all the possible values for string. The default value is enclosed in braces ({}).

Value	Description
'a'	CIE standard illuminant A
'c'	CIE standard illuminant C
'd50'	CIE standard illuminant D50
'd55'	CIE standard illuminant D55
'd65'	CIE standard illuminant D65
{'icc'}	ICC standard profile connection space illuminant; a 16-bit fractional approximation of D50

xyz = whitepoint is the same as xyz = whitepoint('icc').

Class Support

string is a character array. xyz is of class double.

Example

This example returns the XYZ color space representation of the default white reference illuminant 'icc'.

• wp_icc = whitepoint
  
  wp_icc =
  
      0.9642    1.0000    0.8249
  

See also

applycform, lab2double, lab2uint8, lab2uint16, makecform, xyz2double, xyz2uint16

For a full list of the toolbox color space conversion functions, see Color Space Conversions.

watershed

wiener2

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