| 摘要 |
<p>Pixel data are encoded as grouping element data devoid of end of line indications. Input data analyzing means is arranged to generate digits which are representative both of data distributions and data occurrences and processing means identify groupings of digits of mutually similar value. In one embodiment the image is analyzed for determining the occurrences of value 0, value 1, . . . , value 15 of the pixels and theses values are ranked according to their occurrence figures. Values which occur most frequently are coded with relatively many "0" bits and values which occur less frequently are coded with relatively many "1" bits. The bit planes are then entropy encoded. Also each bit lane can be encoded by encoding the positions and sizes of squares of elements of bit value "1".</p> |
