Adaptive color super resolution thresholding

Details Adaptive color super resolution thresholding Adaptive color super resolution thresholding

2005-01-11

2005-01-11

Tran, Phuoc (Department: 2621)

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

C382S272000, C382S273000

Reexamination Certificate

active

06842541

ABSTRACT:
Methods and systems for adaptively thresholding color image pixels are based on determining a signed (e.g., a plus or minus sign) single-component gray image which can be supersampled and binarized. The method computes the distance of a given color image pixel from an idealized plane which segments the color space into two regions. The process is made adaptive by making the threshold a function of neighborhood pixels. This combines the information from all color channels, such as, for example, 3 or 4 color channels, into a high quality gray channel used for binarization.

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patent: 6243499 (2001-06-01), Loce et al.
patent: 6731800 (2004-05-01), Barthel et al.

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