Abstract: It is not possible to display image data exchanged between portable terminals with different output capabilities. The data processing control apparatus processes processing object data based on the output capability of an output device capable of outputting the processing object data such as image data, and outputs to the output device the processed data that is the processed processing object data. Therefore, the processing object data was converted to the data adapted for the output capability of the output device so that the output device can output any processing object data.

Abstract: Provided are a method of making correction for color sensor output values in color image forming apparatus, which succeeds in improving color reproducibility of the color image forming apparatus, and the color image forming apparatus provided with the method.

Abstract: In an image conversion apparatus converts an input image having a process color component and a spot color component, which is represented by density data for colors, into a halftone dot image represented by halftone dot data for colors of process colors, first halftone dot providing means provides the process color component constituting the input image in form of a halftone dot expression using a predetermined halftone dot sort; spot color separating means separates the spot color component constituting the input image into the process colors; second halftone dot providing means provides the spot color component separated into the process colors by said spot color separating means in form of a halftone dot expression using a halftone dot sort different from the halftone dot sort used in said first halftone dot providing means; and halftone dot synthesizing means synthesizes the process color component provided in form of a halftone dot expression obtained in said first halftone dot providing means with the

Abstract: A method to detect frequency and angle of a binary halftone pattern. The method employs an exclusive-or operation which is applied locally to a region of a binary bit map and its spatially shifted version. The resulting bits from the exclusive-or operation are summed over the region. The exclusive-or operation is repeated for a range of shift values. In a halftone region, the shift at which the minimum sum occurs reflects the angle and the frequency of the halftone.

Abstract: A dithering system yielding two-dimensional dither functioning is implemented without line memories. For each primary input color, a feedback loop outputs an color input signal plus error that can be preset to different values. The desired result is that vertical artifacts on a display formed from the output signals are relocated to different locations on consecutive display lines. If signal magnitude from the feedback loop output exceeds the magnitude of the video system creating the display, signal magnitude is preset to a value representing error at the start of the display line.

Abstract: Even when a jaggy occurs in an original image, the image is accurately enlarged and a good image cannot be obtained as a result. In the case of performing pixel interpolation on an image in a dot matrix state, image data is entered in step 100, the whole image is scanned while shifting a marked pixel, and whether or not an edge exists in the direction of 45 or 135 degrees by using the marked pixel as a reference is detected in step 115. When an edge at 45 or 135 degrees exists, the edge is smoothed in the direction of either 45 degrees in step 120 or 135 degrees in step 125. After that, pixel interpolation is carried out irrespective of the presence or absence of an edge. Consequently, when there are irregular edges, it can be prevented that an image is directly subjected to pixel interpolation and a jaggy occurs.

Abstract: Variations of image density and gradation reproducibility upon image formation include short-term variations resulting from variations of apparatus environments, and long-term variations resulting from aging of the photosensitive bodies and toners. In order to standardize the density and gradation reproducibility of a copy image and print image, these variations must be corrected together. For this purpose, test print 1 is formed (S101), a correction coefficient ka of the contrast potential for image formation is optimized based on density information obtained in step S102 (S103), and the grid potential and developing bias potential are set to obtain the contrast potential (S104). Test print 2 is formed (S105), the relationship between the laser output and density is calculated from density information obtained in step S106 (S107), and gamma conversion characteristics are set (S108).

Abstract: Selective edge softening and selective edge dithering is introduced into an image representation to improve local control where halo problems are expected. Selective areas of dilation are isolated and separately dithered or halftoned, the result of which is then swapped back into or substituted for the stored original image. In this manner misregistration and color plane-to-plane interactions can be compensated for in plural image forming station architecture systems. The same technique is also valuable in monochrome systems as an aid to overcoming edge displacement and slow toner problems when the selective edge softening is selectively applied to edges which are in particular perpendicular to the fast scan direction.

Abstract: Selective edge softening and selective edge dithering is introduced into an image representation to improve local control where halo problems are expected. Selective areas of dilation are isolated and separately dithered or halftoned, the result of which is then swapped back into or substituted for the stored original image. In this manner misregistration and color plane-to-plane interactions can be compensated for in plural image forming station architecture systems. The same technique is also valuable in monochrome systems as an aid to overcoming edge displacement and slow toner problems when the selective edge softening is selectively applied to edges which are in particular perpendicular to the fast scan direction.

Abstract: An image reading device includes a light source for illuminating an image in a developed photo film by applying illuminating light thereto. An area CCD reads the image by photoelectrically detecting the illuminating light reflected by, or transmitted through, the developed photo film, to obtain image data respectively of pixels. An input unit inputs information of a photo film type, printing size or printing magnification. A determiner determines whether the photo film type, printing size or printing magnification satisfies a predetermined data correcting condition related to image data correction. An image processor extracts a group of inappropriate pixels from the pixels by checking the image data if the photo film type, printing size or printing magnification satisfies the data correcting condition, and corrects the image data of the inappropriate pixel group.

Abstract: There is disclosed an image processing condition setting apparatus for determining an image processing condition defining contents of an image processing to set up the image processing condition to an image processing apparatus for executing the image processing in accordance with the determined image processing condition.

Abstract: An object of the invention is to provide a printing method whereby a function for retreating print data in the case where the print data cannot be printed is provided, and the printing of other print data is preferentially performed or a printing is enabled to be executed when an apparatus enters a printable status of the print data, thereby improving a print working efficiency.

Abstract: A superpattern generator uses a first halftone pattern representing a first gray level and a second halftone pattern representing a second gray level to generate a larger pattern or “superpattern”. In a preferred implementation, the superpattern generator generates a grid of elements to be used as a template for the superpattern, calculates a distance value representing the “distance” from the first gray level to a desired gray level TX, determines how many elements of the grid represent the first halftone pattern and how many represent the second halftone pattern based on the distance value, superimposes a dither matrix on the grid and assigns values representing the first halftone pattern or the second halftone pattern to pixels within the elements of the grid by examining threshold values in the dither matrix. This process is repeated for various values of TX to generate a set of superpatterns representing a set of gray levels intermediate to the first gray level and the second gray level.

Abstract: Disclosed is an image processing apparatus in which image data is generated by a formatter based upon PDL data from a host computer and the image data is output from a printer via an image input/output controller. The apparatus has a scanner unit and a facsimile unit and is capable of transmitting data and of scanning an image while printing is in progress. The formatter senses a service call arising from an error or the like and sends the image input/output controller a request to display this fact. As a result of detection of the error, the image input/output controller halts communication with the formatter and sends a RESET signal to the formatter, whereby the formatter is initialized. Even if an abnormally occurs in a printing function, therefore, recovery of the printing function can be achieved without affecting the scanner and facsimile functions.

Abstract: A page to be printed is organized into a plurality of strips. To rendered the page using a tandem printer, each strip is rendered a plurality of times, once for each print engine of the tandem printer. Each time the selected strip is rendered for a different one of the print engines, the rendered image data for that print engine is stored into a separate memory area, such as a buffer, associated with that print engine Once a selected strip is rendered and the rendered image data stored into the associated memory areas, the rendered image data is used by the appropriate print engines to form image portions on a receiving sheet corresponding to the rendered image data. At the same time, a next strip is selected and repeatedly rendered for each of the print engines.

Abstract: In equipments interconnected over an interface pursuant to the IEEE 1394 standard, the information indicating the detailed printing state is transmitted/received to prompt the user to take proper measures. An image printing system, proposed to this end, includes an STB 3 having an data conversion unit 13 and a printing device 5 having a data input unit 31. The data conversion unit 13 of the STB 3 generates a printing state information request which demands the printing state information including the error information and the alarm information, outputs the image data and the printing state information request in a packet pursuant to the IEEE 1394 standard and is fed with a response to the printing state information request.

Abstract: In an image data conversion apparatus for converting input image data of four colors consisting of cyan, magenta, yellow and black into output image data, there is provided a detection section for detecting an existence of a point or an area on an image in which any one of cyan, magenta and yellow has a value exceeding a first predetermined value, and black has a value exceeding a second predetermined value, in accordance with the input image data, and a conversion section having two modes of a first mode wherein said input image data is converted into output image data which is independent of an existence of said detection section, and a second mode wherein in the event that the detection section detects an existence of the point or the area, the input image data is converted into an output image data which is representative of an existence of the point or the area.

Abstract: A method to capture any user-selected image such as a corporate logo, a photograph, or a key word or phrase, and to convert that image into a microscopic halftone dot with tonal variation features, and to allow substitution of theses dots for conventional square, round, elliptical, diamond and/or other shaped dots typically used in normal commercial printing. Through this invention, all or selected graphical elements of a printed image can be rendered in “logodots” that can be verified with a magnifying device and that are difficult to copy using commercial photocopiers and scanners and result in pronounced streaking patterns in copies so made. Through this invention an economical, graphical manufacturing technique is provided for printing security documents such as checks, certificates, transcripts, and other objects having monetary or intrinsic value.

Abstract: Trapping conditions including trapping parameters and trapping areas are established for the image of a certain page displayed on a display unit through an input device. Another page is specified to which the trapping conditions thus established for the image of the certain page are to be applied. Thus, the trapping conditions thus established for the image of the certain page can be applied to the image of the other page.

Abstract: A method of printing a highlight color image uses half-tone printing reference patterns for generating printing values for a print original image for a standard color and for generating printing values for a print original image for a highlight color. The information pertaining to the color values of the original image that are assigned to a standard color region or to a highlight color region is integrated into the half-tone printing reference patterns, whereby the printing of a highlight image is limited to a selection of the corresponding half-tone printing reference pattern and the acceptance of the printing value indicated in the half-tone printing reference pattern. Only one corresponding selection for determining the printing values for the standard color and for the highlight color is carried out for each image point.