发明名称 |
Content-based indexing of images by coding levels defined as a function of reduced entropy |
摘要 |
A video image indexing system includes a method for identifying categories in compressed digital data for improved retrieval of video images. An encoder receives a frame and digitizes the image data while a sub-band coder codes each digitized frame at a plurality of transform levels to derive categorized data segments. Data segments are stored and then retrieved according to minimum entropy of Eigenvalues in a first transform level. Preferably, the compression is improved by creating a residual image of each frame by subtracting a predicted frame image from the actual frame image. This compression of data enhances the recreation of lossless video images at the receiver.
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申请公布号 |
US6041147(A) |
申请公布日期 |
2000.03.21 |
申请号 |
US19960732803 |
申请日期 |
1996.10.15 |
申请人 |
HUGHES ELECTRONICS CORPORATION |
发明人 |
MEAD, DONALD C. |
分类号 |
G06F17/30;G06T9/00;(IPC1-7):G06K9/54;G06K9/60 |
主分类号 |
G06F17/30 |
代理机构 |
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