ADAPTIVE GAMMA CORRECTOR USING INTEGRATION LOOK-UP TABLE

Title:

ADAPTIVE GAMMA CORRECTOR USING INTEGRATION LOOK-UP TABLE

Document Type and Number:

Japanese Patent JPH09224174

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To decide gamma correction from a complicated distribution histogram in real time without expanding the scale of a hardware by providing a matrix part, histogram extraction part, histogram integration part, integration look-up table(LUT) and gamma decision part as specified ones respectively. SOLUTION: A matrix part 60 receives the R, G and B signals of an image signal and outputs luminance signals. While using the luminance signals outputted from the matrix part 60, a histogram extraction part 62 extracts the distribution histogram of luminance signals. While using the histogram outputted from the histogram extraction part 62, a histogram integration part 64 integrates it. While using the output of the histogram integration part 64, an integration LUT 66 corrects the inputted image signal into an image suitable for a current image. A gamma decision part 68 decides the gamma from the integration LUT 66 and outputs the corrected image.

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Inventors:

RI SOUKOU
RI KOUJIYOU

Application Number:

JP575897A

Publication Date:

August 26, 1997

Filing Date:

January 16, 1997

Export Citation:

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Assignee:

SAMSUNG ELECTRONIC

International Classes:

G06T1/00; G06T1/20; G06T5/00; H04N5/225; H04N9/69; H04N5/202; (IPC1-7): H04N5/202; G06T1/00; G06T5/00; H04N9/69

Attorney, Agent or Firm:

Tadahiko Ito (1 outside)

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