Image correction method

Details Image correction method Image correction method

2007-04-24

2007-04-24

Alavi, Amir (Department: 2624)

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

C358S461000

Reexamination Certificate

active

10368498

ABSTRACT:
An image correction method is provided. First, scan an all-white document and form a scanned image including a plurality of image pixels with each of them having a gray level value. Next, gather these gray level values statistically such that each of them has an image pixel quantity. Then the maximum gray level value and the minimum gray level value are selected and a middle gray level value is obtained accordingly. Following that, determine whether the reference gray level value is greater or smaller than the middle gray level value according to the document, select the gray level values from within the interval of (the reference gray level value±a gray level value), and weight average the selected gray level values according to these selected gray level values and their corresponding image pixel quantities to obtain a corrected gray level value.

REFERENCES:
patent: 5469267 (1995-11-01), Wang
patent: 6075621 (2000-06-01), Takeuchi et al.
patent: 6674890 (2004-01-01), Maeda et al.
patent: 6791720 (2004-09-01), Hsieh
patent: 2001/0055415 (2001-12-01), Nozaki
patent: 2004/0047516 (2004-03-01), Tseng

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