Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2002-12-10
2008-10-07
Bella, Matthew C. (Department: 2624)
Image analysis
Image compression or coding
Quantization
C382S246000, C382S247000, C382S250000, C358S426140
Reexamination Certificate
active
07433531
ABSTRACT:
The present invention relates to an image capturing apparatus and method in which the image recording time is reduced and the memory capacity required for compression is also reduced. A number-of-bytes calculation unit302determines the number of bytes after compression based on an integrated value of high-frequency integrated data supplied from a high-frequency integration processor. Based on the determined number of bytes, a Q-scale calculation unit303determines a Q-scale based on which the image data can be compressed one time to a predetermined data size. A Q-table generation unit304generates a Q-table based on the Q-scale. A DCT unit321performs a discrete cosine transform on the input image data. A quantization processor322adjusts the compression ratio of the image data based on the up-to-date Q-table supplied from the Q-table generation unit304. A variable-length coding processor323encodes the image data with variable length coding such as Huffman coding, and outputs the resulting compressed image data. The present invention is applicable to digital cameras.
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Kawanishi Isao
Nakajima Ken
Naruse Tomohiko
Bella Matthew C.
Emas Ellen Marcie
Frommer William S.
Frommer & Lawrence & Haug LLP
Sony Corporation
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