| 摘要 |
An image compression method in which the size of a compressed low resolution version of an image is used to either estimate a compression factor for the image needed to obtain an aim compressed image size, or to estimate the size of the compressed image resulting from a predetermined compression factor. The estimate can be made with the aid of a predetermined relationship between compressed image size, image resolution and compression factor, which relationship may be a linear or linear inverse one. This relationship is preferably obtained from images of the same class as the one to be compressed. The image is then compressed using the estimated or predetermined compression factor. An apparatus using such a method is also provided.
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