画像処理回路、画像表示装置及び画像処理方法

Japanese Patent JP4013887

B2

Aspects of the invention can provide an image processing circuit for gray scale correction, an image display apparatus, and an image processing method that allow reduction in the storage capacity needed for storing correction characteristics data without increasing clock rate in relation to interpolation processing of correction characteristics. A exemplary image processing circuit according to the invention can be applied, for example, to color correction or gamma correction of color image data. Gray scale correction characteristics data for a number of gray scale levels that is less than the number of gray scale levels of input image data can be stored in first and second lookup table storing units. Considering a gray scale value of a pixel that is being considered for gray scale correction processing as an input gray scale value, the first and second lookup-table storing units are referred to, obtaining an output gray scale value corresponding to the input gray scale value and an output gray scale value corresponding to an adjacent input gray scale value. An adjacent gray scale value refers to a gray scale value that is higher by one or lower by one than another input gray scale value. Then, output gray scale values between these two adjacent output gray scale values can be calculated by linear interpolation, obtaining output values for all input gray scale values. Subsequently, gray scale correction can be performed for each pixel of input image data, outputting corrected image data.

Takashi Komozawa
Kenji Mori
Horiuchi Hiroshi

JP2003370631A

November 28, 2007

October 30, 2003

Click for automatic bibliography generation  

Seiko Epson Corporation

G06T5/00; G03F3/08; G06K15/00; G09G3/20; G09G5/00; G09G5/06; G09G5/36; H04N1/407; H04N5/20; H04N9/69; H04N9/73

JP2003203225A
JP2003274160A

Masahiko Ueyanagi
Osamu Suzawa

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