Abstract: A motion image decoding apparatus receives encoded image data which has first, second and third data regions, such as MPEG macroblocks which have predetermined sizes, and a motion vector for each of the data regions. The motion image decoding apparatus conceals errors in the first data region by generating an error signal and using a motion vector of a second data region which is located on a line preceding a line containing the first data region having the error and which is in a same picture as the first data region and also by using a motion vector corresponding to a third data region which is located in a column preceding the column containing the first data region having the error and which is also in a same picture as that of the first data region. If no error is generated in the first data region, the motion vector for that data region is used to perform motion compensation.

Abstract: A printer for digital image information, wherein supplied data files containing image data for printing can be stored in a memory and are not printed until an operator has given a print command by means of a key on a control panel, the data files in the memory being listed on a display in the control panel for an operator to select one for printing before giving the print command, and wherein before giving this command, the operator can optionally adjust the printer settings in order to obtain a print of the required appearance, the printer also being provided, if required, with a scanner for scanning documents, thus functioning as a copying machine, in which case printing and copying become essentially similar functions with identical operation.

Abstract: A computer-controlled printing system includes a host computer, an intelligent printer and an intelligent post printer processor. The print job is controlled by defining print data, printer control data and printer post processor control data in a print data stream from the host computer. The print data and printer control data are read at the intelligent printer. The intelligent printer executes the print control data to print the print data on a print medium. The printer also determines if there is post processor control data in the print data stream and, if so, sends the post processor control data from the printer to the intelligent post processor. The post processor reads the post processor control data, and executes the post processor control data to perform selected modification of the print medium.

Abstract: A scanner frame comprises a vertical track which is slidably attached at one end thereof to a horizontal track. The horizontal track is attached to a drawing board or any other suitable flat surface. An optical imaging device (i.e., an optical scanner) is slidably attached to the vertical track. A marker strip comprising a series of bars of uniform pitch are disposed on a surface of the horizontal track along the length thereof. These bars are detected by a sensor assembly disposed on the vertical track. Another marker strip comprising a series of bars of uniform pitch are disposed on a surface of the vertical track along the length thereof. These bars are detected by a sensor assembly disposed on the scanner. During use, a drawing to be scanned is secured on a board, the vertical track is positioned at the left-most position and the scanner is positioned at the upper end of the vertical track.

Abstract: In a digital copying machine having facsimile functions, in which image data can be stored for polling transmission, use of a confirmation print mode for normal copying is inhibited by modifying the appearance of copies that are produced in the confirmation print mode. This modification can be made by altering the size of the printed image, or combining additional image data with the stored image data to produce an altered version of the document.

Abstract: A facsimile apparatus comprises a communication unit for conducting data communication through a public line, and a changing unit for changing a transmission level of a signal transmitted by the communication unit to the line.

Abstract: A guide apparatus of a contact image sensor, which facilitates the affixing of the contact image sensor to the guide apparatus, includes: a guide rib in a form of a rectangle having one open side; a fixing projection at the inner center of the rib; and a hole disposed in the center of the rib so as to be separated from the fixing projection; the contact image sensor including two holes on a side surface thereof so as to be separated apart from each other, the side surface of the contact image sensor being engaged into the inner portion of the guide rib, the fixing projection being engaged into one of the two holes on the side surface of the contact image sensor, the hole of the guide apparatus being immediately adjacent to the other of the two holes on the side surface of the contact image sensor, so that the guide apparatus and the contact image sensor are fixedly assembled by a fastener engaging the other of the holes on the side surface of the contact image sensor after passing through the hole in the guid

Abstract: The location of a subscriber device in a wireless cellular communications system is established by transmitting digital data signals to a cellular digital data receiver of the subscriber device from at least three different cellular cell site transmitters at known locations. Each data signal has a time-synchronized synchronization signal, preferably synchronized through the time signals of the global positioning system. The time of arrival of each of the time-synchronized synchronization signals is determined with respect to an internal clock of the receiver. The location of the subscriber device is established from the locations of the cell sites and the times of arrival of the synchronization signals relative to the internal clock.

Abstract: An image processor for parallel image processing includes a first image processing section which binarizes first image data by using a variable area tone method and a second image processing section which executes a smoothing process with respect to second image data. A data separator divides image data into first image data corresponding to halftone image regions and second image data corresponding to binary image regions. The first image data is transmitted to the first image processing section while the second image data is transmitted to the second image processing section. A data delay section is provided at an upstream side of the first image processing section to delay image data for the required processing time difference between the first image process and the second image process. A data combining section combines the image data output from the first image processing section and the second image processing section to produce combined image data which is transmitted to an image forming system.

Abstract: To present a facsimile apparatus capable of preventing occurrence of unsuccessful transmission and enhancing the certainty of information transmission, the manipulating procedure in the manual reception mode for receiving a facsimile signal after an incoming telephone call is provided to the telephone user. When the manual receiving mode is set in the facsimile apparatus, after receipt of the incoming call by lifting the handset of the external telephone set in response to ringing of the calling side terminal device, a CNG signal is transmitted if the calling side is a facsimile apparatus set in an automatic transmitting mode. When this CNG signal is received, the voice signal for instructing the operating procedure for receiving the facsimile signal is delivered to the external telephone set.

Abstract: Two modes for releasing a memory, a mode in which the memory is released page by page and a mode in which the memory is released block by block are provided and one of the modes is selected in accordance with the amount of received data to enhance the reliability of the reception and recording with a smaller capacity of image memory. When the reception of the data is started and the image data is filled in the memory block, the recording of the received image to a recording medium is started. Each time the recording of the memory block is completed, the release mode of the image memory is set. Namely, when the reception of the page recorded in the memory hold mode is not yet completed and the remaining capacity of the image memory reaches below a predetermined capacity, the recorded memory blocks are released and the release mode is switched to the memory release mode.

Abstract: A digital color processing method for images from scanners and digital cameras processes image data suitable for display on monitors or color hardcopies produced by digital color printers and correct hue shift and incorrect exposure based on the image content. The method automatically corrects the data based on the histogram of the acquired image normalizing the image data to correct for the hue shift and determining the gamma parameter to correct the exposure of the image.

Abstract: An image reading apparatus for book-like document includes a height detecting device which detects a height of the document, a luminance detecting device which detects a luminance of a background portion of the document image, a gloss calculating device which calculates gloss of a surface of the document in accordance with the height and the luminance, a luminance calculating device which calculates luminance corresponding to a background portion of the document image in accordance with the gloss and the height, a selecting device which selects either the detected luminance or the calculated luminance, and a density correcting means for correcting a density of the image data in accordance with said selected luminance.

Abstract: A method and apparatus for automatic color correction is described. The method and apparatus implemented technique in which a nonlinear interpolation technique is applied to a relatively small number of measured sample values generated from color image patches to provide a color lookup table having a larger number of calibration values stored therein.

Abstract: A conveyance device 4 for conveying a manuscript to an image reading section of a main body mounted by an image processing system is provided with a base member 6 removably fixed to the main body to provide a conveyance path 5, a driving mechanism and a manuscript guide member 8 for driving and conveying the manuscript. The manuscript is located between the manuscript guide member and a rib 9 at a left-hand side, and conveyed in a stable status. On a surface of a top end of a moving member 16 associated with the manuscript guide member is provided a white colored plate 17. A groove portion 18 other than the plate is dark, and the image is read to be binary coded whereby a pixel corresponding to the plate indicates "1". A position of the plate is located in the guide member or a right hand side edge of the manuscript, and a left hand side edge is fixed by the rib. Accordingly, a manuscript width (read width) Is determined from the pixel "1".

Abstract: Input bit map image data having a resolution of 600 dpi is converted into multivalue image data MI having a resolution of 600 dpi by a binary-to-multivalue converting unit. The multivalue image data MI is converted into multivalue image data having a resolution of 400 dpi by a resolution converting unit. The edge direction of the multivalue image data is detected by an edge direction detecting unit, so as to obtain an edge direction detection flag. Based on the edge direction detection flag, an image data outputting unit outputs multivalue image data having a resolution of 400 dpi from the edge direction detecting unit.

Abstract: A DMA transfer controller for DMA transferring one page of image data without increasing a burden on a CPU is provided with address holders for holding addresses for each of a plurality of DMA channels. An address selector selects an address for an operating DMA channel and an address adding value prescriber prescribes an address adding value at an arbitrary value. An address adding value selector selects an address adding value between prescribed address adding values and a fixed adding value and an address adder adds such an address adding value to an output address value. A latch address selector selects an initial address value when initializing a DMA transfer and an address value produced after an address adding value has been added for providing such an address to address holders when DMA transfer is started.

Abstract: A contact image sensor assembly for use in a facsimile comprises a scan roller and a contact image sensor to allow a manuscript to be passed therebetween during the rotation of the scan roller. The scan roller is rotatably mounted to a pair of side brackets having a slit, respectively, the slit having a roller fixing groove and a bent groove upwardly bent. A screw consists of a fastening portion fastened to a tap hole of the contact image sensor and an axle inserted into the slit. During the rotation of the scan roller, the axle of the screw is upwardly shifted along the bent groove while the contact image sensor is leftwardly biased by two springs, thereby automatically aligning with a desired scan point of the contact image sensor.

Abstract: A printing system having a plurality of printers and computers connected to each other through a communication network is disclosed. A first computer is connected with a second computer through the network. A first computer generates a printing job and a print request signal for executing the printing job according to a print request designated by the user to a first printer. A first computer also generates a continued print request signal containing information unique to the user according to a continued print request from the user requesting the execution of the printing job to a second printer. The printing job and each signal are transmitted to the communication network from the communication unit of the first computer. A second computer receives the printing job and each signal through the communication network. The second computer further causes the first printer to execute the printing job designated by the user in accordance with the print request signal.

Abstract: A pixel block is coded by both of a quadrature transform coding section and a block truncation coding section. A code amount counter determines a first code amount of one-block coded data produced by the quadrature transform coding section. A code amount judgment section compares the first code amount with a threshold that is smaller than or equal to a second code amount of one-block coded data produced by the block truncation coding section, and produces discrimination information indicating a comparison result. A selector selects the coded data that is output from the quadrature transform coding section if the first code amount is smaller than the threshold, and selects the coded data that is output from the block truncation coding section if the first code amount is larger than the threshold. A storage section stores the discrimination information for each pixel block and the coded data that is output from the selector and corresponds to the discrimination information.