Region based illumination-normalization method and system

Details Region based illumination-normalization method and system Region based illumination-normalization method and system

2007-08-28

2007-08-28

Patel, Kanjibhai (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C382S264000, C382S274000

Reexamination Certificate

active

10742844

ABSTRACT:
A region-based illumination-normalization method and system utilizes a plurality of filters to filter a test image for obtaining a high frequency image and a low pass image. The low pass image is segmented into several regions by an image segmentation unit so that a region-based adjustment unit normalizes the regions based on an illumination reference model, respectively. Finally, an image combination unit is employed to combine the high frequency image and the low pass image that is normalized.

REFERENCES:
patent: 4463375 (1984-07-01), Macovski
patent: 4827528 (1989-05-01), Macovski
patent: 6002794 (1999-12-01), Bonneau et al.
patent: 6122408 (2000-09-01), Fang et al.
patent: 7167575 (2007-01-01), Nichani et al.

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