Canon Kabushiki Kaisha

Kenichi Outa

Masahiro Funada

Yoshiyuki Suzuki

Michio Kawase

Yoshinori Ikeda

Yasumichi Suzuki

Yoichi Takaragi

Takashi Kawai

Eiji Ohta

There is disclosed an apparatus for image reading or processing, that can precisely identify a particular pattern, such as of banknotes or securities of faithful copying of which is to be prohibited. The apparatus is provided with a detecting unit for detecting positional information of an original image, and a discriminating unit for extracting the pattern data of a certain part of the original image and discriminating whether the original image is the predetermined image, based on the similarity between the pattern data and the predetermined pattern.

Image reading or processing with ability to prevent copying of certain

An image processing apparatus includes an input device for inputting image data representing an original, a discrimination unit for discriminating whether the original includes a predetermined color image, and an output unit for outputting a discrimination result of the discrimination unit. The discrimination unit performs discriminations corresponding to a first predetermined color image and a second predetermined color image which is different from the first predetermined color image. The discrimination unit includes a color memory which stores first and second standards corresponding to the first and second predetermined color images, respectively.

Indentification of a particular color image using distribution, and

In an image processing system an input image signal is processed to output a processed image signal. A first parameter relating to a first kind of characteristic, and a second parameter relating to a second kind of characteristic, are each extracted from the input image signal. A controlling parameter which is a multi-value datum is inferred by using membership functions relating to the first and second parameters, and also inferred is a membership function relating to the controlling parameter and a plurality of rules representing relations between the first and second parameters and the controlling parameter for determining a processing condition for processing the input image signal.

Image processing apparatus which controls processing conditions of an

An image processing apparatus comprises: an input device for supplying color image information; a discrimination unit to discriminate whether the color image information includes a predetermined image or not in accordance with a color distribution of the color image information supplied by the input device; and a processing circuit to process the color image information in accordance with the result of the discrimination of the discriminating means. The color image information is constructed by a plurality of color component signals. The color distribution is a distribution of the color image information in a color space.

Identification of a particular color image using color distribution, and

There is disclosed an apparatus for image reading or processing, that can precisely identify a particularly pattern, such as of banknotes or securities faithful copying of which is to be prohibited. The apparatus is provided with a detecting unit for detecting positional information of an original image, and a discriminating unit for extracting the pattern data of a certain part of the original image and discriminating whether the original image is the predetermined image, based on the similarity between the pattern data and the predetermined pattern.

There is disclosed an apparatus for image reading or processing, that can precisely identify a particular pattern, such as of banknotes or securities faithful copying of which is to be prohibited. The apparatus is provided with a detecting unit for detecting positional information of an original image, and a discriminating unit for extracting the pattern data of a certain part of the original image and discriminating whether the original image is the predetermined image, based on the similarity between the pattern data and the predetermined pattern.

There is provided an image processing apparatus comprising: an input device to input an image signal; a processor for processing the input image signal and outputting an image reproduction signal; a detecting circuit to detect characteristics of the input image signal; and a control circuit to control conditions of processing of the image signal by the processor by means of a fuzzy inference based on characteristics of the image signal which were detected by the detecting circuit. Such characteristics of the image signal include the kind of image such as character, screen, and photograph. The optimum spatial filtering process can be executed for areas of each of the character, screen, and photograph types. A mixing ratio of the edge emphasis and the smoothing can be continuously changed for characteristic amounts of an original. Membership functions of a plurality of parameters are synthesized and a consequence is derived by the fuzzy inference algorithm. Thus, erroneous judgment for a vague image area is prevented and discontinuity which occurs at a change point of the image processes can be also eliminated.

Image processing apparatus capable of using fuzzy logic

Apparatus for image reading or processing

A color film reading apparatus of this invention has holding means for holding a color negative film therein; illuminating means for projecting illumination light onto the color negative film; reading means for reading image data from the color negative film; shading correcting means for performing shading correction; and controlling means for controlling the reading means to cause the reading means to read data relative to an unexposed portion of the color negative film to thereby obtain shading correction data for the shading correcting means. The apparatus is capable of generating high-gradation color signals from either of color negative and positive films. This invention further provides an image forming apparatus capable of producing a high-gradation image from either of a film-type original document or a reflection-type original document.

A color film reading apparatus providing high-gradation color signals

A color film reading apparatus capable of generating high-gradation color signals from either a color negative or positive film includes a holding device for holding a color negative film, illuminating apparatus for projecting illumination light onto the color negative film, a reading unit for reading image data from the light projected through the color negative film, and shading circuitry for performing shading correction. Control circuitry controls the reading unit to cause the reading unit to raed data from an unexposed portion of the negative to obtain shading correction data. In the case of a positive film, the controlling circuitry sets the shading correction data on the basis of data obtained from the illumination light. Further, a high-gradation color image may be obtained from either a film original or a reflection from an original document.

Color film reading apparatus providing high-gradation color signals

A color image reading apparatus for reading an image of a color negative film having: an exposing unit to expose the color film; a reading unit to read an image recorded on the color film by photoelectrically converting the transmission light from the exposed color film; a detector to detect a density of the image on the basis of an output from the reading unit; and a controller to control an exposure light quantity of the exposing means in accordance with the image density detected by the detector. The detector detects the image density on the basis of a histogram of the output from the reading unit or on the basis of an output of a special color which is output from the reading unit. With this apparatus, the reading operation suitable for the base density and image density of the color negative film can be performed.

Growing community of inventors

Yokohama, Japan

Kenichi Outa