Image processing apparatus, method and program on a...

Details Image processing apparatus, method and program on a... Image processing apparatus, method and program on a...

2005-08-11

2009-08-11

Alavi, Amir (Department: 2624)

Image analysis

Image compression or coding

C382S275000, C382S246000

Reexamination Certificate

active

07574058

ABSTRACT:
A plurality of band-limited images is produced from an original image. A transformed image is produced by processing each pixel value in the band-limited images so that the absolute value of an output value does not exceed that of an input value. The processing is non-linear transformation processing. If the absolute value of the input value does not exceed a predetermined threshold value, the absolute value of the output value increases as that of the input value increases, or if it exceeds the predetermined threshold value, the absolute value of the output value does not exceed that of an output value corresponding to the threshold value. Pixel values in the transformed image are multiplied by a predetermined subtraction coefficient, and subtracted from pixel values in the original image to obtain pixel values in a processed image. A compressed image is produced by performing entropy encoding on the processed image.

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