Sharp Kabushiki Kaisha Corporation

Sharp Kabuskiki Kaisha

Makio Goto

Tatsuya Tanaka

Masanori Minami

Yoshinori Murakami

Takahiro Daidoh

The present invention provides an image processing device which can reduce a storage capacity and perform color correction in accordance with the types of image. The image processing device of the present invention has an input correction sectionincluding: input color correction sectionfor, using a matrix coefficient, correcting strength of signals for color components in image data of a supplied image; a matrix coefficient storage sectionfor storing a plurality of matrix coefficients in accordance with types of image; and control sectionfor reading a matrix coefficient corresponding to the type of a supplied image out of the matrix coefficients stored in the matrix coefficient storage sectionand setting the matrix coefficient that has been read in the input color correction section

Image processing device, image forming device, image processing method, image processing program, and recording medium containing the image processing program recorded thereon

In a color conversion section, a mode judging sectionjudges a mode in effect: a copy mode or a printer mode, according to a mode judging signal. When the copy mode is identified, the mode judging sectionsupplied RGB data to a first color conversion process section, and the first color conversion sectioncarries out a first color conversion process in which a transitional color conversion value, which is color-transited from a precise color conversion value and a memory color conversion value, is set as a color conversion value with respect to memory color corresponding data. When the printer mode is identified, the mode judging sectionsupplies the RGB data to a second color conversion process section, and the second color conversion process sectioncarries out a second color conversion process in which the memory color conversion value is set as a color conversion value with respect to the memory color corresponding data.

Image processing method and image apparatus, and image forming apparatus, program, and storage medium

An image reader having a shading correction function includes a scanner for scanning an original, a converter for converting the received light from the original into electric signals and outputting the electric signal as data of an read image, and a corrector for carrying out a shading correction operation on the data of the read image on the basis of a shading correction value and outputting corrected image data. The corrector computes shading correction values for the whole reading face of the original platen from the shading correction value at an arbitrary position on the reading face and carries out the shading correction operation on the data of the read image on the basis of the computed shading correction values.

Image reader

A color image processing apparatus of the present invention includes (1) first lattice for dividing a color separation signal space in the form of a lattice so as to store in a table coordinates of lattice points of the color separation signal space thus divided and (2) second lattice for further dividing a specific unit cube of the lattice in the form of a lattice so as to additionally store in the table coordinates of lattice points of the specific unit cube thus divided. Depending on whether or not inputted image data of image information belong to the specific unit cube of the lattice, color correction method having different conversion accuracy is adopted, thereby permitting to provide a color image processing apparatus which reduce the occurrence of an error when color-correcting a color requiring accurate color correction, and prevent the continuity of an image from being not kept.

Color image processing apparatus

A color correcting device includes (1) a color correcting section furnished with a plurality of color correcting systems having their respective color correcting rates and color correcting accuracy, (2) a representative color selecting section for selecting representative colors from a color separation signal of an original image, and (3) a color correcting system selecting section for selecting one of the color correcting systems based on the color correcting result of the representative colors, whereby the color correcting device converts the color separation signal of the original image into a color correcting signal using the color correcting system selected by the color correcting system selecting section. This arrangement makes it possible to judge the quality of a color-corrected image without subjecting all the input image data of the original image to the color correcting operation. Consequently, a copy image of the original image can be made efficiently with satisfactory color correcting accuracy.

Method of correcting colors and color image processing apparatus

A color image processing apparatus including a read device for reading an original image, a color correcting device for color-correcting input image data using a color-correcting neural network, and an output device for outputting color-corrected image data. The neural network with teacher data, which are in effect learning color data reflecting the visual characteristics of human eyes, using learning data produced by reading a copy image produced based on the learning color data. Accordingly, the neural network can correct colors accurately in a manner to fully reflect the visual characteristics of human eyes, thereby making the color difference between the original image and a copy of the same less noticeable.

Growing community of inventors

Nara, Japan

Makio Goto