| 发明名称 |
Image Data Processing Apparatus, Image Data Processing Method, And Program |
| 摘要 |
Image data are compressed such that they do not visually deteriorate. Nonlinear compression and DPCM compression are performed in series. A compressing unit 41 that uses nonlinear transform inputs image data (L bits per pixel) of each color component. Image data are compressed to M bits (M<L) according to a compression transform tale TB1 that has been set up according to image information extracted from original image data. The compressing unit 41 performs compression transform having a characteristic similar to a gamma curve characteristic used in a gamma correction disposed downstream of the compressing unit 41. Image data compressed and transformed to M bits by the nonlinear compressing unit 41 are input to a DPCM compressing unit 42. The DPCM compressing unit 42 finally compresses input data to N bits (for example, N=10) according to a quantization table TB2. The compressed image data are stored to an image memory through a packing section 43.
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| 申请公布号 |
US2009290045(A1) |
申请公布日期 |
2009.11.26 |
| 申请号 |
US20060922155 |
申请日期 |
2006.04.18 |
| 申请人 |
SONY CORPORATION |
发明人 |
FUKUDA KYOKO;YONEDA YUTAKA;FUKUNAGA MASATSUGU |
| 分类号 |
H04N5/76;G06K9/36 |
主分类号 |
H04N5/76 |
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