Image analysis – Image compression or coding
Reexamination Certificate
2011-04-12
2011-04-12
Bali, Vikkram (Department: 2624)
Image analysis
Image compression or coding
C382S305000, C358S403000, C358S462000, C345S555000
Reexamination Certificate
active
07925098
ABSTRACT:
This invention is to generate encoded data within a target amount. A first encoding unit generates lossy encoded data of each pixel block by using a quantization matrix Qispecified by a parameter i. A second encoding unit generates lossless encoded data of each pixel block. Let Lx be the lossless encoded data length, and Ly be the lossy encoded data length. A control unit determines, using a nonlinear boundary function fi,j( ) specified by the parameters i and j, whether condition: Ly<fi,j(Lx) is satisfied and stores the determination result as history information in a history memory unit. One of the two encoded data is stored in a memory based on the determination result. If the encoded data amount stored in the memory has exceeded the target amount, the control unit updates at least one of the encoding parameters i and j on the basis of the history information.
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Ito Naoki
Tamura Hirokazu
Bali Vikkram
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Yeh Eueng-Nan
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