Method for compressing and extending an image by...

Details Method for compressing and extending an image by... Method for compressing and extending an image by...

H - Electricity

04

N

H04N 7/30 (2006.01) H04N 7/26 (2006.01) H04N 7/133 (1990.01)

Patent

CA 2088862

ABSTRACT OF THE DISCLOSURE Block distortion standards are obtained by considering the non-linearity of the visual sensation on stimulus, the non-linearity of illumination brightness versus voltage in an image display apparatus, the measurement of errors of lightness which is sensed on brightness stimulus by human beings, the discrimination threshold characteristic on lightness of the visual sensation, and brightness ruggedness. The brightness ruggedness is made proximate by brightness dispersion, so that a calculation cost is lowered.

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