HistNormImg

DESCRIPTION

Computes the histogram normalization of an image. The data values of the image are rescaled so that the histogram of the output image is approximately a bell-shaped normal curve with the desired Mean and Std Deviation. Each source channel is normalized independently. This operation can be used to enhance the contrast of an image. Histogram normalization is discussed in:

Digital Image Processing, Gonzales, R.C., Wintz, P., Addison Wesley, Second Edition, 1987, pp 144--160.

INPUTS

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

WIDGETS

Port: Mean
Type: Dial
Desired mean.

Port: Std Deviation
Type: Dial
Desired standard deviation.

OUTPUTS

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

KNOWN PROBLEMS

SEE ALSO

Histogram, HistEqualImg, 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