Image processing using different image sizes depending on whether the processing is color or monochrome

摘要

An image processor includes spatial filters which execute parallel processing in units of component data of image data made up of a plurality of component data, and an original image color determination unit selects if input image data from a color image input unit is to be processed as a monochrome or color image. When it is selected that the input image data is to be processed as a monochrome image, the processing operations of the spatial filters for the image data are controlled to be executed stepwise.