An interpolation calculation circuit for improving the image quality for recording
and display is provided. The interpolation calculation circuit interpolates a necessary
pixel on the basis of interpolation calculation (cubic interpolation processing)
by an approximate expression of an interpolation coefficient of at least 3rd-order.
This cubic interpolation processing is applied to basic processing of an electronic
camera, i.e., 3-CCD processing, format conversion, and image enlargement/reduction.
In consideration of the operation load on the electronic camera, cubic interpolation
processing is performed in accordance with the image sensing mode or the like only
when it is necessary, thereby controlling whether execution of interpolation processing
is enabled/disabled.
