| 摘要 |
PURPOSE:To attain inexpensive, easily operatable and easily observable picture reducing processing reduced at its information missing. CONSTITUTION:In the case of reducing a binary picture developed on a bit map, the rate R of the number of white or black picture elements to all the number of picture elements in a judged area including an operation area with size corresponding to a previously specified reduction rate is calculated. The operation area is processed by OR operation or AND operation in accordance with the rate R larger or smaller than a previously set threshold to form a bit map for a reduced picture. |
