decorrstretch - Apply decorrelation stretch to multichannel image
Syntax
S = decorrstretch(I)
S = decorrstretch(I, TOL)
Description
S = decorrstretch(I) applies
a decorrelation stretch to a multichannel image I and
returns the result in S. S has
the same size and class as I. The mean and variance
in each band are the same as in I.
S = decorrstretch(I, TOL) applies
a contrast following the decorrelation stretch. The contrast stretch
is controlled by TOL:
TOL = [LOW_FRACT HIGH_FRACT] specifies
the fraction of the image to saturate at low and high intensities.
If TOL is a scalar, LOW_FRACT
= TOL, and HIGH_FRACT = 1 - TOL, which
saturates equal fractions at low and high intensities.
Notes
The decorrelation stretch is normally applied to three band
images (ordinary RGB images or RGB multispectral composite images),
but decorrstretch works on an arbitrary number
of bands. The primary purpose of decorrelation stretch is visual enhancement.
Small adjustments to TOL can strongly affect the
visual appearance of the output. |
Class Support
The input image must be of class uint8, uint16, int16, single,
or double.
Examples
[X, map] = imread('forest.tif');
S = decorrstretch(ind2rgb(X, map),'tol',0.01);
figure, imshow(X,map)
figure, imshow(S)See Also
imadjust, stretchlim
 | deconvwnr | | demosaic |  |
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