Apparatus and method for image coding

Provided is an image coding technique capable of realizing a high speed coding processing for a mixed image with less of a visual distortion. The image coding apparatus includes: plural scan units 3 each having scan means 7 scanning an original image to be encoded according to a prescribed scan sequ...

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Bibliographic Details
Main Author KAMATA SEIICHIRO
Format Patent
LanguageEnglish
Published 03.05.2007
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
HANDLING RECORD CARRIERS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:Provided is an image coding technique capable of realizing a high speed coding processing for a mixed image with less of a visual distortion. The image coding apparatus includes: plural scan units 3 each having scan means 7 scanning an original image to be encoded according to a prescribed scan sequence and piecewidth linear approximation means 9 dividing a one-dimensional original image generated by scanning the original image with the scan means 7 into plural intervals so that accumulated square error or a dispersion of pixel values in each interval is a prescribed threshold value or less to generate one-dimensional approximation image data obtained by approximation of pixel values by the average value of pixel values in the intervals, which correspond to each of plural scan sequences different from one another; and optimal scan selecting means 4 comparing the numbers of intervals obtained by dividing of the piecewidth linear approximation means 9 of the scan units 3 to thereby select one dimensional approximation image data having a minimum number of intervals.
Bibliography:Application Number: US20050264134