| 摘要 |
PURPOSE:To leave the feature of an original image in the image of a reduction result even at the time of reducing source data having regularity. CONSTITUTION:A reader part 2 reads data of one line from a file 1. A shift judgement part 3 delivers data of one line to a shift processing part 4 when the value of a flag is zero and delivers it to a reduction processing part 5 when the value of the flag is not zero. The shift processing part 4 shifts the delivered data of one line and delivers the result of the shifting to the reduction processing part 5. The reduction processing part 5 thins-out line of delivered data in accordance with a reduction ratio, executes processing for jumping several lines of source data in accordance with the reduction ratio and starts a flag update part 9. The flag update part 9 sets the value of the flag to +1, checks whether the value is the inverse of the reduction ratio or not and sets the value of the flag to zero at the time of coincidence. A plotting part 6 writes data after thinning-out in a display memory. The image of the display memory 7 is displayed on a display part 8. |
