| 摘要 |
A method for feature extraction. At least a raw image of a frame in a video sequence is stored in a storage area. A request is made for an image of the frame having a desired attribute. In response to the request, one of the images of the frame having the desired attribute in the storage area is returned if possible; otherwise, an image having the desired attribute, which is transformed from one of the images of the frame in the storage area, is returned and added the storage area. A value of a feature of the frame is calculated using the returned image.
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