HistEqualImg

DESCRIPTION

Computes a histogram equalization of an image. The data values of the image are rescaled so that the cumulative histogram of the output image is approximately linear. Each source channel is normalized independently. This operation can be used to enhance the contrast of an image. Histogram equalization is discussed in:

Digital Image Processing, Gonzales, R.C., Wintz, P., Addison Wesley, Second Edition, 1987, pp 146--152.

INPUTS

Port: Img In
Type: Lattice
Constraints: 1..3-D
Source image.

WIDGETS

OUTPUTS

Port: Img Out
Type: Lattice
Constraints: 1..3-D
Equalized histogram image.

KNOWN PROBLEMS

SEE ALSO

Histogram, HistNormImg, HistScaleImg.

Note: the Histogram module is not present in every implementation of IRIS Explorer.


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© The Numerical Algorithms Group Ltd, Oxford UK. 2000