Size magnification processing unit for processing digital image in accordance with magnification factor

摘要

A size magnification processing unit processes an original digital image in accordance with a magnification factor. The size magnification unit includes a smoothing unit for processing the original digital image under a smoothing characteristic and for obtaining a smoothed image, a controller for controlling the smoothing characteristic in accordance with the magnification factor, under which characteristic the original digital image is to be processed, and an interpolation unit for performing an interpolation process in which image data of pixels arranged at sampling intervals depending on the magnification factor is calculated based on the smoothed image supplied from the smoothing unit. The interpolation characteristic under which the interpolation process is to be performed by the interpolation unit may be controlled in accordance with the magnification factor. The smoothing characteristic and the interpolation characteristic may be controlled in accordance with a type of the original image.