| 摘要 |
An example embodiment may involve obtaining (i) an a×b attribute macro-cell, and (ii) a×b pixel macro-cells for each of a luminance plane, a first color plane, and a second color plane of an input image. The a×b pixel macro-cells may each contain 4 non-overlapping m×n pixel cells. The example embodiment may also involve determining 4 attribute-plane output values that represent the 4 non-overlapping m×n attribute cells, 1 to 4 luminance-plane output values that represent the a×b pixel macro-cell of the luminance plane, a first color-plane output value to represent the a×b pixel macro-cell of the first color plane, and a second color-plane output value to represent the a×b pixel macro-cell of the second color plane. The example embodiment may further involve writing an interleaved representation of the output values to a computer-readable output medium. |
| 主权项 |
1. A computer-implemented method comprising execution, by a processor, of operations including:
obtaining, from a memory, (i) an attribute plane containing a plurality of a×b attribute macro-cells, and (ii) a digital image containing pluralities of a×b pixel macro-cells for each of a luminance plane, a first color plane, and a second color plane, wherein the a×b pixel macro-cells each contain 4 non-overlapping m×n pixel cells, wherein elements of the a×b attribute macro-cells are associated with respective pixels in each of the a×b pixel macro-cells; applying compression to each particular a×b attribute cell and its associated a×b pixel macro-cells, wherein applying the compression comprises:
determining 4 attribute-plane output values that respectively represent 4 non-overlapping m×n attribute cells in the particular a×b attribute macro-cell,based at least partially on whether the particular a×b attribute macro-cell indicates that at least e pixels in each of the associated a×b pixel macro-cells represent edges in the digital image, determining 1 to 4 luminance-plane output values that represent the associated a×b pixel macro-cell of the luminance plane, wherein e is at least 1, anddetermining a first color-plane output value to represent the associated a×b pixel macro-cell of the first color plane and a second color-plane output value to represent the associated a×b pixel macro-cell of the second color plane; and storing, in the memory, a compressed representation of the digital image and the attribute plane, wherein 4 attribute-plane output values, the 1 to 4 luminance-plane output values, the first color-plane output value, and the second color-plane output value are interleaved with one another in the compressed representation. |
