Abstract: A communication controller enables connection between different apparatuses while protecting user's original commands and confidential data. The communication controller has a standardized mode and a user's original mode. By preventing connection with an apparatus which does not have a proper access right in advance, and transmitting data while enciphering the data when the user's original mode is executed, internal information is protected, and the secrecy protection property is not reduced.

Abstract: In an information processing system in which an input apparatus (10) which can input information and can transmit the input information, and a processing apparatus (7) which can process received information are connected to a network (4), and which system can realize a function of inputting and processing information by the network as a whole, information input by the input apparatus is controlled to be divisionally or simultaneously transmitted in correspondence with the relationship between the input apparatus (10) and the processing apparatus (7) in the network.

Abstract: A copying apparatus includes a first cassette for stacking recording sheets each having a protruding portion, a second cassette for stacking recording sheets having no protruding portion, a detecting unit for detecting a protruding portion of an original to be copied, and a copy unit for copying an image of an original onto the recording sheet fed from the first cassette in the case where the protruding portion of the original is detected by the detecting unit and for copying the image of the original onto the recording sheet fed from the second cassette in the case where the protruding portion of the original is not detected by the detecting unit.

Abstract: A multivalue digital transmission system performs a stable AGC operation. The system performs the operations of: converting information data to be transmitted into a multivalue symbol sequence; adding an area comprising a binary symbol sequence, which does not depend on the information data, to the multivalue symbol sequence in a periodic manner, and transmitting a resultant signal after converting it to a multivalue digital modulation signal; detecting the binary symbol area from a demodulation signal obtained by demodulating an IF signal converted from the multivalue digital modulation signal; and performing a gain control of the IF signal based on a signal level of the demodulation signal obtained during a detection period of said binary symbol area.

Abstract: There is suggested a network system capable of changing information on functions (e.g., completion of setting, permission of use, permission of accessing) set in a data processing apparatus which is connected to the network system by remote control through the network. In a network system to which a workstation, a multi-functional device (MFU 20), and the like, are connected, the MFU 20 has tables (command table, command permission table) containing information on processing functions which the MFU has (AE processing function, for instance). The workstation sends a command to the MFU 20 for making it set to a mode for changing contents of the tables, and the MFU 20 which received the command manages the functions of itself by controlling the contents of the tables.

Abstract: An image processing apparatus having a first mode for processing electrical signals by a pre-scan operation and a second mode for processing electrical signals by a main scan operation. The first mode forms a histogram on the basis of electrical signals obtained by the pre-scan operation, and detects predetermined feature points from the formed histogram. A table is formed for converting signal levels of the electrical signals according to the detected predetermined feature points of the histogram based on the image type of the original. The second mode generates reproduction signals from electrical signals obtained by the main scan operation in accordance with the table.

Abstract: An image processing apparatus for converting color images into monochromatic pattern images. The image processing apparatus includes: means for detecting the area of a color image; means for converting a color image into a monochromatic pattern image; and control means for varying such image processing in accordance with the result of detection made by the means for detecting the area. When a thin line is detected in a color area, the method of processing is determined based on the width of the detected thin line. For example, when the width of the thin line is smaller than a predetermined value, the area of such thin line may be outputted as a plain image instead of a pattern image so that it may easily be seen or recognized. The contour of a color area may be made conspicuous by combining a plain image and a pattern image.

Abstract: The present invention is intended to provide an image processing apparatus capable of two-color output representation in high accuracy even with a full-colored original.A color original is entered by an input means for prescan, a density distribution with respect to a hue is obtained for each electric signal of color image information, and a characteristic point of the color original image is obtained from the result of the density distribution. The two-color separation means separates a full-colored original to two colors free from the same color representation according to the information of the characteristic point obtained.

Abstract: An image processing apparatus includes an image processing unit, a counter, and a determining unit. The image processing unit processes image data between first and second color values of an input image. The counter counts generation frequencies of the respective color values of the input image. The determining unit determines the first and second color values on the basis of the count result obtained by the counter.

Abstract: A two-color separating circuit separates an input image signal into two color signals R and K. In conformity with a color signal indicating the maximum value of the separated color signals, a color-mixture correcting circuit corrects the other color signal. The density of the color pixel formed by the corrected color signal is predicted, and the difference between the result of prediction and the color signal before correction is distributed among pixels of the same color surrounding this pixel. Accordingly, it is possible to provide an image processing apparatus for supplying an image forming apparatus, which collectively forms images of two colors, with an image signal subjected to processing capable of performing excellent color mixing without lowering the density of whichever of the two color-component images is formed last.

Abstract: An image processing apparatus for converting color images into monochromatic pattern images. The image processing apparatus includes: means for detecting the area of a color image; means for converting a color image into a monochromatic pattern image; and control means for varying such image processing in accordance with the result of detection made by the means for detecting the area. When a thin line is detected in a color area, the method of processing is determined based on the width of the detected thin line. For example, when the width of the thin line is smaller than a predetermined value, the area of such thin line may be outputted as a plain image instead of a pattern image so that it may easily be seen or recognized. The contour of a color area may be made conspicuous by combining a plain image and a pattern image.

Abstract: An image forming apparatus includes an input unit, a color discriminating unit, a pattern generating unit, and an image forming unit. The input unit inputs an image having a plurality of colors. The discriminating unit discriminates the colors of the image input from the input unit. The pattern generating unit generates a pattern image in accordance with the discrimination result obtained by the discriminating unit. The image forming unit forms the pattern image, generated by the pattern generating unit, on a recording medium. The image forming unit forms the pattern image in different colors in accordance with the discrimination result obtained by the discriminating unit.

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: Disclosed is an image processing apparatus for processing a color image signal obtained by converting color image information on a document into an electric signal. In the apparatus, a marking color of a coloring material different from the color of the document is detected. When the color of the document adjoins to the marked region, at least a part of the color of the document is changed to the color of the marked region.

Abstract: A color image processor for scanning a color image, includes an irradiation light for irradiating the color image with a light, a color separator for separating the reflected light from the irradiated color image into plural element color lights, plural bar-shaped photoelectric transformer for transforming each of the element color lights into an electrical image signal, a converter for converting the electrical image signal to a digital image signal, a memory in which the digital image signal is stored, and a determiner for determining whether a scanner, such as the irradiation light and the photoelectric transformer is functioning properly according to a density level recognized from the digital image signal.

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: Disclosed is an image processing apparatus for processing a color image signal obtained by converting color image information on a document into an electric signal. In the apparatus, a color ghost is corrected from the color of the color image signal in accordance with a predetermined correction manner. When a marked region on the document with a coloring member different from the color of the document is detected and an image process is performed in relation to the marked region, the predetermined correction manner is changed.

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: 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.