| 摘要 |
A system and method used to perform lossless wavelet-based image transformations. In one embodiment, the method used for these transformations and for bit precision reduction. First, at least a luminance value is produced for each row of pixels of a selected pixel block. Next, a determination is made as to whether a luminance value associated with a particular row of pixels of the selected pixel block is positive. Thereafter, a reduced luminance value is produced when the luminance value is determined to be positive, the reduced luminance value is represented by a lesser number of bits than the luminance value. Finally, the second and third steps are continued for each luminance value associated with each row of the selected pixel block. The values are used in an iterative fashion to calculate the low and high spatial frequency and create graphics with minimal use of bandwidth.
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