Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2006-09-12
2006-09-12
Chen, Wenpeng (Department: 2624)
Image analysis
Image compression or coding
Quantization
C358S001160
Reexamination Certificate
active
07106911
ABSTRACT:
An image input through an input unit is compressed by an encoding unit and stored in first and second memories. A first counter counts the data in its code amount. When the amount of encoded data generated reaches a predetermined size, an encoding sequence control unit sets quantization steps in the encoding unit and re-encoding unit to increase compression ratios. The encoding sequence control unit clears the first memory, causes the re-encoding unit to re-encode the encoded data stored in the second memory, and stores the resultant data in the first memory. Since the encoding unit continues encoding data with the set quantization step, the encoded data are stored in the first memory from the start of the image. Subsequently, every time the data amount stored in the first memory reaches a predetermined amount, the quantization step is increased, and the processing is repeated.
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Ito Naoki
Kato Shin-ichi
Nakayama Tadayoshi
Ohta Ken-ichi
Osawa Hidefumi
Canon Kabushiki Kaisha
Chen Wenpeng
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