| 摘要 |
PROBLEM TO BE SOLVED: To observe defects of dots, even without using a high-definition monitor by displaying a large or small value as is, when the value of each pixel is larger or smaller than the average value of four pixels by a certain level. SOLUTION: As for outputs from a memory 3 to a memory 6, pixels are rearranged in a memory 7 in good order. The output of the memory 7 is 2048 pixels vertical and 2048 pixels horizontal. When adjacent vertical and horizontal four pixels (resembling the shape of a square with a cross inside) of the memory 7 are replaced with one pixel by an averaging circuit 8, the output becomes 1024 pixels vertical and 1024 pixels horizontal, and when the output of the averaging circuit 8 is converted to an analog signal by a D/A converter 11, it can be easily observed on a monitor 12. However, since information corresponding to 2048 pixels is lost, averaged pixel information is compared with the information of pixels from the memory 3 to the memory 6 for the unit of a pixel by a comparator 9, and when the value from the memory 3 to the memory 6 is larger or smaller by a certain level, that value is replaced with the pixel information from a memory 8 to the memory 6 by a replacer 10.
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