Canon Kabushiki Kaisha

Kenjiro Cho

Hiroshi Nonoshita

Seiji Saito

Yasuhisa Shigehara

Yasuhisa Ishizawa

Yoshitsugu Yamanashi

There is disclosed an image processing system with variable gamma characteristic, in which gamma correction is not conducted in the image processing but conducted for the output equipment when the result of image processing is released outside.

Image processing system

An image processing apparatus is disclosed which includes circuitry for selectively applying variable gamma corrections to an image signal during both on-line and off-line modes of operation. In the off-line mode, the apparatus operates to simultaneously correct image signals for non-linearities produced by both an input device and an output device. In the on-line mode, correction is made for the non-linearities of the input device and a separate correction is made for the non-linearities of the output device. Such operation allows the apparatus to process linear data in the on-line mode.

Apparatus for providing variable gamma correction in both on-line and

An image processing apparatus is disclosed which inputs/outputs an image in which image data items having different quantities of information for each pixel are mixed with one another. The information quantity for each of the image data items and information about the I/O positions are stored in a corresponding manner. When data is input, data is converted into the proper information quantities in accordance with input position, for storage. When data is output, the stored image data is converted into output data in accordance with the respective information quantities. As a result, the memory capacity can be reduced, the flexibility can be improved at the time of use and the memory can be used efficiently.

Image processing apparatus with flexible use of memory and variable

An image processing system includes: a memory unit for storing an image in the form of vectors; a discrimination unit for fetching vector data representative of the image stored in the memory unit and discriminating the signs of a component of a normal vector of the vector data at a point constituting the contour of the image; and a moving unit for moving the point constituting the contour of the image on the basis of the discrimination result by the discrimination unit.

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Tokyo, Japan

Kenjiro Cho