Abstract: In a color image forming apparatus, an image retainer, a charger, a plurality of developing devices and a cleaner are made in one unit. The unit is dismountably supported in a housing so that the unit can be moved out from a first position at which the unit is set in the housing to a second position at which jam disposition is conducted. When the unit means is placed at the second position, a part of the apparatus is used to cover the image retaining surface at the transfer section.

Abstract: An image processing apparatus for processing a digital color signal, given from outside the image processing apparatus, into a digital color recording signal, comprising; a color code generator for generating a color code signal representing a color of a digital pixel image signal, and a color reproduction unit for generating a color recording signal by processing another digital pixel image signal, in which these two digital pixel image signals are processed separately.

Abstract: An image processing method and apparatus for detecting at least one region designated by at least one line of at least one closed loop on an original, wherein the original is scanned and an image formation is generated; the image information is processed for generating image data and region data which represent said at least one designated region; and the region data is processed for each scanning line.

Abstract: An image processing apparatus including an image input circuit for reading color images obtained by separating each pixel of an an original image into three color components a color data-forming circuit for forming color data for identifying a color of each of the pixels as either a white color, an achromatic color or a chromatic color on the basis of the color images, a color-reproducing circuit for converting the color images into density data corresponding to plural recording colors, and a marked region-detecting circuit for detecting a marked portion on the basis of the color data formed by the color data-forming circuit and for extracting a region enclosed by the marked portion.

Abstract: An image processing apparatus including input terminals for introducing color image data in the form of pixels obtained by reading an original image, a classifying circuit for classifying a color of each pixel as either an achromatic color, a chromatic color, or an intermediate color by processing the color image data in accordance with classifying criterion, a discrimination circuit for discriminating a kind of the original image on the basis of the color image data, the classifying circuit being capable of changing the classifying criterion in accordance with the discriminated kind of the original image.

Abstract: The invention provides a color image-processing apparatus in which there is provided a color reproduction table for producing plural color image signals for each of a plurality of processing channels in response to digital pixel signals splitted into said plurality of processing channels. There is further provided a signal processor for modifying a bit configuration of the digital pixel signals so that the bit configuration is differently modified corresponding to each of said plurality of processing channels. The produced plural color image signals are composed into one channel to form a new color image.

Abstract: Disclosed is an image processing apparatus for processing digital color image data, wherein there are provided an image input circuit for introducing color image signal into a conversion circuit which generates digital color image data including color data and density data, a data processing circuit which includes a plurality of image processing circuits for processing the color data and the density data, and wherein latch circuits are further provided to each of the plurality of image processing circuits so that the color code data and the density data are respectively latched every after passing through the plurality of image circuit.

Abstract: In an image processing apparatus capable of enlarging/reducing operation according to the invention, there are provided an input buffer for storing an image data, an enlargement/reduction circuit for performing the enlargement/reduction processing of the image data outputted from the input buffer, an output buffer for storing the enlarged/reduced image data, and a timing circuit for controlling processing timing for the image data through the input buffer, the enlargement/reduction circuit and the output buffer. The timing circuit respectively controls the data read-out timing from the input buffer and the data write-in timing into the output buffer in accordance with the designated enlargement/reduction ratio by regulating the frequency of clock pulse.

Abstract: A color image processing apparatus, capable of readily processing an image as required based on a simple circuit configuration, adapted to both detect a region designated by a color marker on a multicolor document, and perform a specific image processing at the inside or outside of the detected region.

Abstract: An image processor in which a high-frequency component of image signals is diminished, and a density value of each of the "diminished" image signals is compared with a first reference value in a first comparator. A first classifier is provided for classifying the image signals into a character image and a tonal image based on a signal output from the first comparator. A length or an area of an image signal classified into the tonal image is measured, and a second comparator is provided for comparing the length or area of a measured image signal measured with a second reference value corresponding to a reference length or a reference area. A second classifier is provided for further classifying an image signal below the second reference value from the second comparator into an image signal of the character image.

Abstract: An image processing apparatus in which first color image signals of an original are separated into a plurality of color images and the optical information of the color image is converted to an electrical signal for each pixel of the image. The first color image signal is processed to generate a second color image signal which corresponds to each of the pixels, has a plurality of bits and carries density data and color data, the color data designating which one of a plurality of predetermined colors the color of the pixel belongs to, and image processing device for processing the second color image signal.

Abstract: An image processing apparatus includes an image data forming unit for forming density data corresponding to each of a plurality of color components including an achromatic color and color data for discriminating a chromatic color portion from an achromatic color portion of an image, the density data and the color data being formed in units of pixels on the basis of original image information, a density data selector for selecting one of a plurality of density data output from the image data forming unit, color ghost correction for unit for changing the color data of a pixel when a serial arrangement of color data of a plurality of successive pixels including the pixel coincides with one of a plurality of predetermined patterns.

Abstract: An image processing apparatus has an image memory storing a image data input by a image reader, a data interface means converting the picture element density of the image data transferred from the image memory through a transfer control circuit, a frame memory storing the converted image data, a display controller controlling the converted image data as to display on a display, and an operating means producing a layout command for the displayed image data, wherein the display controller processes the converted image data stored in the frame memory in accordance with the layout command and changes the displayed image data.

Abstract: This invention relates to a color image processing apparatus capable of processing color image signal, and specially relates to a color image processing apparatus applicable to a simple color recording machine. To record outside or inside of a region enclosed with a color marker by converting into a designated specific color, the invention is characterized in that color image information is formed by optically scanning a document having a closed region designated with the specific color, thereby obtaining a plurality of color data and performing color converting process on a color inside or outside of the closed region on the basis of the specific color.

Abstract: An apparatus for providing high-quality enlarged or reduced image by employing a simple circuit configuration which incorporates an interpolation method. For this purpose, the apparatus is so constituted that the interpolation data is provided to compensate for a gap of data between pixels in the entire image data, and that the interpolation data are produced from look-up tables based on interpolation data selection signals which are outputted in accordance with a designated scale ratio.

Abstract: The present invention provides an image processing apparatus for estimating a halftone image from an original binary coded image, wherein there are provided a plurality of line memories for introducing the original binary coded image data and for transferring the data into a shift-register being set therein plural kinds of scanning windows, a computing circuit for counting black pixels within each of the plural kinds of scanning windows, a density pattern-discriminating circuit for performing the comparison judgment between the original binary image and the rebinary image based on the computed value, a conditional formula circuit for performing conditional inequality algorism, and a window judgment circuit having a predetermined truth table for selecting one optimum scanning window.

Abstract: A color image processing technique using optics to separate an original color image into a plurality of colors. These colors are photoelectrically converted to electric signals. Color information signals are then generated from these electric signals. The color information signals are coded by comparing them with a threshold value. An individualized set of such threshold values is provided for each of the plurality of colors. In one embodiment, a luminance signal is provided from the color information signals. The luminance signal is utilized in response to a monochrome code selection signal to enable the original color image to be reproduced as a monochrome image. Color gamut information and color density information of the color gamut can be obtained from the color information signals during a first scan of a document bearing the color image.

Abstract: A color image processing apparatus wherein different color filters are provided in an image pickup device corresponding to plural groups of small pixels, each group of which is one unit of color pixels, and color image signals are obtained from the common position of the small pixel groups by suitably interpolating color image signals obtained from the small pixel groups.

Abstract: A continuous image estimation method of a binary image wherein only one scanning aperture satisfying a predetermined condition for each picture element of a continuous image to be estimated from a plurality of scanning apertures for each kind in a dither image formed of a dither matrix, and the continuous image is estimated on the basis of the number of white or black picture elements in the scanning aperture selected. The predetermined condition is that a gradation expression is conducted in a lower spatial frequency range by using larger scanning apertures and in a higher spatial frequency range by using smaller scanning apertures, and that for the coincidence between patterns of a dither image in the scanning aperture and a binary image, which is made binary with the dither matrix from a continuous image formed on the bases of the number of the white or black picture elements in the scanning aperture, the patterns being obtained by comparing the dither image and the binary image for each aperture.

Abstract: A method of and apparatus for shading correction wherein a reference voltage of an A/D converter converting an image signal into a digital signal is set as a shading correction signal. The image signal and the shading correction signal are designed to be of different level from each other in the timing out of the effective period of the image signal. The shading correction signal is outputted in the timing during the effective period of the image signal and the reference voltage is outputted in the timing out of the effective period of the image signal.