| 摘要 |
PURPOSE:To attain image processing with a reader having a comparatively slow processing speed by extracting a read image data at a prescribed interval and changing the extracted position of the read image data at a prescribed period. CONSTITUTION:The image of an original 2 lighted by an original lighting lamp 4 is formed to a photodetection part of a CCD image sensor 8 via the 1st mirror 5, the 2nd mirror 6 and an image forming lens 7. The CCD image sensor 8 is activated synchronously with drive signals 11, 12 from a microcomputer 10 and its output signal is transferred to an A/D converter 9. The A/D converter 9 samples the output data from the image sensor 8 synchronously with the clock signal 14 from the microcomputer 10 to apply A/D conversion and outputs the data 13 to the microcomputer 10. The microcomputer 10 applies the detection of original size and image density based on the inputted data 13, and the detected output is used for binary threshold setting, erasure of unnecessary image or recording paper size selection.
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