Better contrast noise by residue image

Details Better contrast noise by residue image Better contrast noise by residue image

1997-10-14

1998-11-17

Boudreau, Leo H.

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

382261, G06K 940

Patent

active

058388354

ABSTRACT:
A method for contrast-enhancing in a multi-dimensional image in image locally detects a contrast quantity. This quantity is determined to be either in a low range or in a high range. When in the high range, the contrast is locally enhanced with an enhancement factor that is a monotonic non-increasing function of the local contrast. After enhancing, the contrast itself is a monotonically increasing function of the contrast before enhancing.

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"Automatic, Adaptive, Brightness Independent Contrast Enhancement", Signal Processing, vol. 21, (1990), pp. 169-182.
"Noise Reduction in Computerized Tomography Images by Means of Polynomial Transforms", Journal of Visual Comm. and Image Representation, vol. 3, Sep. 1992, pp. 272-285.

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