Image encoding apparatus and computer readable medium

Image encoding apparatus and computer readable medium

A coefficient conversion unit obtains a conversion coefficient for each image region by performing coefficient conversion for each image region. A luminance distribution extraction unit generates luminance distribution information indicating a luminance of each image region. A correction coefficient...

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1. Verfasser: Hirakuri, Shinya
Format: Patent
Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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description A coefficient conversion unit obtains a conversion coefficient for each image region by performing coefficient conversion for each image region. A luminance distribution extraction unit generates luminance distribution information indicating a luminance of each image region. A correction coefficient determination unit determines a correction coefficient based on the luminance distribution information for each image region. A quantization width correction unit obtains a corrected quantization width for each image region by correcting a quantization width with use of a correction coefficient of an image region for each image region. A scalar quantization unit obtains a quantized conversion coefficient for each image region by quantizing a conversion coefficient of an image region with use of a corrected quantization width for each image region. An entropy encoding unit obtains an encoded conversion coefficient for each image region by performing entropy encoding on a quantized conversion coefficient for each image region.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
title Image encoding apparatus and computer readable medium
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