Image processing apparatus with high- and low-resolution image sensors and an edge detector

摘要

An image processing apparatus has image input systems for inputting image data at high and low resolutions, a high pass filter for filtering the low-resolution image data, an image property discrimination processor for discriminating an edge in the high-pass filtered low- resolution image data, and a signal selection circuit for selecting the image of high or low resolution in accordance with the discrimination result of the discrimination processor. The apparatus processes image signals so as to reproduce optimum quality images for all types of original images including character and halftone images.