Bildwiedergabevorrichtung mit selektiver Auflöseerhöhung

摘要

An image output device for performing resolution enhancement for characters, and maintaining original image quality for images which have been subjected to a gradation processing. In the image output device, when input data is character data, the bit image data of character data is stored in a first development memory, while when input data is image data, the bit image data of image data is stored in a second development memory. Upon read-out of data for one page, the bit image data in the first development memory is transferred to a resolution-enhancement processing circuit to be subjected to a resolution enhancement processing, and is then synthesized with the bit image data in the second development memory.