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: An image processing apparatus includes a photoelectric converter, a multiple-value circuit, and a detachable external storage unit. The photoelectric converter photoelectrically coverts data of an original into image signals. The multiple-value circuit converts the image signals into multiple-valued data by comparing the image signals with predetermined threshold value data. The detachable external storage stores the threshold value data. The threshold values can also be made automatically responsive to gray scale data. The automatic mode and the manual selection mode are switched between in response to a release (toggle) signal. Color separation and color ghost correction are provided; and various types of formatting management are faciliated. Partial color converting (as, for example, color reversal) is also provided.

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: According to a method and apparatus for processing an image, density data representing a density of each pixel of original image data and color data representing a color of each pixel are generated. The density and color data are generated as parallel data. A write mode of a memory is set. A memory content is repeated updated in correspondence with the density data and the color data. A read mode of the memory is set. A memory content corresponding to one of the color data is externally read out. Threshold values are set in units of color data on the basis of the memory content read out from the memory. Recording density data having a smaller number of bits is formed by the set threshold values on the basis of the density data. Recording is performed on the basis of the formed recording density data.

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.