Abstract: An encoder decomposes an input color image signal into a luminance signal and color signals, places the color signals in image memories, then fetches color signals of a given screen before and after. A detector calculates differences between the color signals to detect color misregistration either on a pixel basis or a block basis. On the other hand, color signals of a last image acquired before occurrence of color misregistration are stored in frame memories. When color misregistration is detected, a corrector reads the color signals of the last image from the frame memories, and produces correction signals. A counter carries out counting for each difference between color signals of given screens before and after, then detects a distribution of color misregistration of a screen. A selector checks the distribution of color misregistration of a screen to identify the cause of color misregistration, then selectively outputs either the input color image signal or a correction signal sent from the corrector.

Abstract: A process is provided for creating a high resolution copy of a target video frame selected from a sequence of video frames, wherein each video frame comprises two interlaced fields.

Abstract: A method for converting a set of input image pixels having a first resolution and being represented by a set of input image signals to a set of output image pixels having a second resolution and being represented by a set of output image signals. The method is adapted for use in an electroreprographic machine having a memory for storing images and an image output terminal for printing the images.