| 摘要 |
PURPOSE:To perform mask arithmetic efficiently with small memory capacity by providing an auxiliary memory which can be accessed simultaneously with an image memory and holds one column of dimensional data in the image memory. CONSTITUTION:The mask arithmetic processing is processing for determining an aimed picture element value according to circumferential picture element information on an aimed picture element and also processing for scanning 3X3 (9 in total) picture elements on the image memory 301. For the purpose, part of dimensional data at a current scanning position is used even at a next scanning position. For the purpose, the auxiliary memory 302 holds the dimensional data temporarily until a next scan is finished. In this case, the amount of data which are held is unchanged even if the number of picture elements which are processed in parallel increases. Consequently, the parallel mask arithmetic processing is performed efficiently by the small-capacity auxiliary memory 302. |
