Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Reexamination Certificate
2007-01-02
2007-01-02
Do, Anh Hong (Department: 2624)
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
C382S254000, C382S266000
Reexamination Certificate
active
10412875
ABSTRACT:
An image combination device which obtains a wide dynamic range image through combination of at least two images with different light exposure, including a photographing means for photographing an appropriate light exposure image and a different light exposure light image from the appropriate light exposure image, a dividing means for dividing a lower frequency region from the appropriate light exposure image on a frequency information of the appropriate light exposure image, a statistic means for calculating a statistics value relating to characteristic values of pixel signals in the lower frequency region, a determining means for determining a pixel signal level to divide pixel signals of the appropriate light exposure image into an appropriate region and a bright or dark region on the statistics value, and a combining means for correcting the appropriate light exposure image and the different light exposure image in tone commensurate with a light exposure ratio thereof and combining the appropriate light exposure image and the different light exposure image on the pixel signal level.
REFERENCES:
patent: 5294989 (1994-03-01), Moore et al.
patent: 5381248 (1995-01-01), Ikeda et al.
patent: 5550638 (1996-08-01), Ikeda et al.
patent: 5982951 (1999-11-01), Katayama et al.
patent: 6864916 (2005-03-01), Nayar et al.
Do Anh Hong
Olympus Corporation
Volpe and Koenig P.C.
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