| 摘要 |
PURPOSE:To enable the limit elimination of the set range of magnification by executing a sub-scanning variable power preceding to a main-scanning variable power. CONSTITUTION:Preceding to a main scanning variable power, an interpolation operation is performed in a sub-scanning variable power part 1 by using a line buffer 3 and an N times sub-scanning variable power is performed in a sub-scanning variable power part 1. An L times main-scanning variable power is performed for this image information for which the variable power is performed in a main scanning variable power part connected with a latch circuit 4 in the same way. Thus, because the number of main scanning picture element is not increased even if the sub-scanning variable power is performed, as compared with the case where the main scanning variable power is preceding, the capacity of the line buffer can be reduced by the number of picture element of LXN-L=L (N-1) and the limit of the set limit of magnification due to mechanical factors can be eliminated. |
