Abstract: An image processing camera which picks up an image of an object by a pick-up device and outputs a converted electric signal, generates the operational information of the image processing camera synchronized during a vertical fly-back time of the video signal and outputs the operational information generated from the generating device superposed during a vertical fly-back time of the video signal. In order to provide a method for outputting a video signal, an image processing camera and an image processing system using the afore-mentioned method can perform image processing of a video signal using the operational information of an image processing camera on a video signal output from an image processing camera, therefore reducing the cable necessary between an image processing camera and an image processing apparatus.

Abstract: An over head projector including an image inputting device for inputting an image data of a manuscript; a projecting optical system for projecting the image data onto a screen by a first magnification; and an image data magnifying device for dividing a plurality of character image data from the image data of the manuscript into one or more groups of character image data which each group fits a displaying area having a predetermined size, to magnify the character image data by a second magnification, and for transmitting the magnified character image data by each group of character image data onto the projecting optical system.