Canon Kabushiki Kaisha

Atushi Takagi

Nobutoshi Yoshida

Wahei Tokuda

A multiple image forming system for synthesizing images having different kinds of gradation characteristics of an original comprises: a latent image forming circuit for projecting a reflected light from the original onto a photo sensitive drum and forming an electrostatic latent image onto this drum; a developing unit to develop the latent image; and a control circuit to make the latent image forming circuit and the developing unit operative every gradation characteristic for the different gradation characteristic areas in the original, wherein the control circuit changes the latent image forming conditions such as an amount of exposing light to the original of the latent image forming circuit and the developing conditions such as a developing bias of the developing unit in accordance with the kind of gradation characteristic. With this system, the image areas having different kinds of gradation characteristics which mixedly exist in one original are automatically detected and the latent image forming circuit is automatically properly controlled, so that the proper image is reproduced.

Multiple image forming system

A image recording apparatus capable, in the measurement of the background density of an original image, of detecting and omitting an area exceeding a determined width and a determined density in the determination of the background density, thus avoiding incorrect reproduction of background density. A signal output is provided upon detection of image density past the determined width, and the detected image density data is corrected in response to that signal output.

Growing community of inventors

Tokyo, Japan

Atushi Takagi