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