Imaging device

An imaging device comprising:

• a camera that outputs several pieces of photographed data obtained at a constant period by photographing an image on the basis of a camera output signal generated with the constant period, the image being printed on a printing medium transported in a first direction;
• an image data output unit that outputs image data based on said photographed data to an external device;
• and
• an external output signal generator that generates an external output signal indicating timing of output of said image data by said image data output unit,
• wherein said image data output unit includes:
• a buffer configured to store the several pieces of the photographed data output at the constant period from said camera;
• a rate setting unit configured to set a weight responsive to a time gap between said camera output signal and said external output signal;
• and
• an averaging processor that calculates a weighted average of said several pieces of photographed data stored in said buffer at the constant period using respective weights set by said rate setting unit, and
• wherein said image data output unit outputs an image represented by said weighted average calculated by said averaging processor as said image data.