The device includes a module for converting the first and second pixel data into data in the XY coordinate system, a module for generating {HEAD ~ pixel data} of {TAIL ~ an interpolation target pixel} located between a first pixel as an observing pixel on an interpolation axis parallel to X axis or Y axis and a second pixel as a corresponding pixel on the same interpolation axis, based on the pixel data on the first and second sweep lines 
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The device includes a module for converting the first and second pixel data into data in the XY coordinate system , a module for generating { HEAD ~ pixel data } of { TAIL ~ an interpolation target pixel } located between a first pixel as an observing pixel on an interpolation axis parallel to X axis or Y axis and a second pixel as a corresponding pixel on the same interpolation axis , based on the pixel data on the first and second sweep lines
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