Method and apparatus utilizing step-wise gain control for...

Details Method and apparatus utilizing step-wise gain control for... Method and apparatus utilizing step-wise gain control for...

2011-08-09

2011-08-09

Desire, Gregory M (Department: 2624)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S199000, C382S264000, C382S275000

Reexamination Certificate

active

07995857

ABSTRACT:
An apparatus for image processing includes: an edge detection module, for performing an image edge detection for each pixel in an original image data and generating at least one edge detection result for a target pixel in the original image data; a step-wise gain controlling module, coupled to the edge detection module, for determining at least one gain coefficient of the target pixel according to the edge detection result; and a calculation module, coupled to the step-wise gain controlling module, for adjusting an original gray value of the target pixel to generate an output gray value of the target pixel according to the gain coefficient.

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G. Ramponi, N. Strobel, S. K. Mitra, and T.-H. Yu, “Nonlinear unsharp masking methods for image contrast enhancement,” J. Electron. Imag.,vol. 5, No. 3, pp. 353-366, 1996.

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