Image quality prediction apparatus and method, and image quality

Details Image quality prediction apparatus and method, and image quality Image quality prediction apparatus and method, and image quality

1997-08-15

1999-11-23

Tadayon, Bijan

Image analysis

Image enhancement or restoration

382232, G06K 900

Patent

active

059914580

ABSTRACT:
An image quality control apparatus having an image divider, a converter, an image analyzer, an image output property circuit, a quantization method selector, a quantizer and a coder. The image divider divides an input image into a plurality of divided images including a predetermined number of picture elements. The converter converts the divided images into converted coefficients. Then, the image analyzer determines a property of the divided images which is output by the image output property output circuit. A quantization selector selects a quantization method in response to the divided image property that was found by the image analyzer and the image output property output circuit. The quantizer quantizes the conversion coefficients found by the converter in accordance with the quantization methods selected by the quantization selector. A coder then codes the conversion coefficients quantized by the quantizer.

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"Multimedia fugouka no kokusai hyoujun" pp. 18-43--No Date of Public.; No Place of Public.; No Author's Name; No Title; No Publisher.

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