Abstract: A format storage unit stores a predetermined geometric property format. A chart data creating unit creates chart data based upon the geometric property format, and a printing unit creates a test chart by printing mark groups on a recording medium such as a paper sheet based upon the chart data. An image pickup unit outputs a chart image by scanning the test chart, and a mark center calculating unit calculates the center of each mark based upon the chart image. A fitting unit performs a fitting calculation comparing calculation results output from the mark center calculating unit and the chart based upon the geometric property format such that the squared difference therebetween becomes minimum for each mark position.

Abstract: An image display device includes an image division unit 12 dividing an input image into a plurality of image segments partly overlapping each other, an image enlargement unit 13 enlarging the plurality of image segments to form a plurality of enlarged image segments, an output image formation unit 15 forming a plurality of output images corresponding to spatially different display positions from the plurality of enlarged image segments, an image display unit 17 successively displaying a plurality of output images, and a pixel shifting control unit 18 spatially shifting display positions indicated by image display unit 17 so that respective output images are displayed at corresponding display positions synchronizing with the successive displays of the plurality of output images.

Abstract: An image forming apparatus includes a recording head unit in which a plurality of recording heads are arranged in substantially the same direction as the arranging direction of recording elements such that an overlapped region is formed between the heads, a set angle/overlapped region detector which detects the width of the overlapped region of each of the plurality of recording heads from a predetermined test chart printed using the recording head unit, and an image data distributor which distributes image data input to each of the plurality of recording heads, in accordance with the detected width of the overlapped region between the heads. This apparatus achieves an effect of eliminating density unevenness in the head overlapped region only by rough head alignment.

Abstract: An image correction data calculation method comprises the steps of acquiring an input-output characteristic at each of a plurality of display elements on a display screen of an image display device, on the basis of image data captured by a CCD camera (steps S101 to S105), setting a target input-output characteristic to be obtained at each of the plurality of display elements (step S106), and calculating image correction data used to correct the input-output characteristic for an input image signal, according to the locations of display elements on the screen, on the basis of the input-output characteristic acquired in the acquisition step and the target input-output characteristic to be obtained (step S107).

Abstract: A geometric property analyzing system comprises: a format storage unit (9) for storing a predetermined geometric property format; a chart data creating unit (10) for creating chart data based upon the geometric property format; a printing unit (16) for creating a test chart by printing mark groups on a recording medium such as a paper sheet based upon the chart data; an image pickup unit (17) for outputting a chart image by scanning the test chart; a mark center calculating unit (12) for calculating the center of each mark based upon the chart image; and a fitting unit (13) for performing fitting calculation by making comparison between the calculation results output from the mark center calculating unit (12) and the chart based upon the geometric property format such that the squared the difference therebetween becomes minimum for each mark position, whereby the geometric properties are analyzed.

Abstract: An image recording device comprises: a first and second recording heads (11, 12) formed of recording elements cyclically arrayed, which are continuously arrayed with an overlapped region; image data distributing means (2) for distributing image data to these recording heads (11, 12); image data distribution region variation means (3) for setting an image data distribution region where the image data of each pixel is distributed to both the recording heads (11, 12) by the image data distributing means 2; correction parameter storage means (5) for storing a correction parameter for correcting the difference in the image density properties between the image data distribution region and the other region due to phase difference between the recording heads (11, 12); and image data correcting means (4) for correcting the image data in the image data distribution region based upon the correction parameter.

Abstract: In an image processing apparatus, a lower magnification image acquisition section acquires a whole specimen image at a lower magnification. An area division information memory stores, as area division information, the position information at a plurality of smaller areas into which a whole specimen is divided with a partially overlapped portion left. In accordance with the area division information, a high magnification image acquisition section sequentially acquires an image on substantially the some area as the divided area at a higher magnification. A positional displacement detection section detects the positional displacement of the acquired higher magnification image based on the lower magnification specimen image. A positional displacement correction section corrects the position of the respective high magnification image based on the detected positional displacement.

Abstract: An image correction data calculation method comprises the steps of acquiring an input-output characteristic at each of a plurality of display elements on a display screen of an image display device, on the basis of image data captured by a CCD camera (steps S101 to S105), setting a target input-output characteristic to be obtained at each of the plurality of display elements (step S106), and calculating image correction data used to correct the input-output characteristic for an input image signal, according to the locations of display elements on the screen, on the basis of the input-output characteristic acquired in the acquisition step and the target input-output characteristic to be obtained (step S107).

Abstract: There is disclosed an image recording apparatus comprising an input image memory, a temporary memory, a position memory to store a transfer start position in the input image memory and a transfer destination position in the temporary memory and an overlapping width between recording heads for each nozzle in a case where some of images recorded in the input image memory are transferred to the temporary memory, a scanner, a position calculation section which calculates the transfer start position and the transfer destination position and the overlapping width from read test pattern data, and an image transfer section which transfers the images of the input image memory to the temporary memory in accordance with the transfer start position of the position memory.

Abstract: An image recording apparatus is provided which records an image by scanning, relatively to a recording medium, a line-type recording head unit in a direction substantially perpendicular to a predetermined direction, wherein the line-type recording head unit includes a plurality of recording heads which are disposed in a direction substantially the same as the predetermined direction and which have recording width that partially overlap each other and wherein each of the recording heads has a plurality of recording elements disposed in a direction substantially the same as the predetermined direction. The image recording apparatus includes a correction data generator for producing correction data for correcting characteristics of respective recording elements at two-dimensional positions on the recording medium, and an adjustment unit for adjusting an input image signal inputted to the recording elements at the two-dimensional positions, based on the correction data.

Abstract: There is disclosed an image recording apparatus comprising an input image memory, a temporary memory, a position memory to store a transfer start position in the input image memory and a transfer destination position in the temporary memory and an overlapping width between recording heads for each nozzle in a case where some of images recorded in the input image memory are transferred to the temporary memory, a scanner, a position calculation section which calculates the transfer start position and the transfer destination position and the overlapping width from read test pattern data, and an image transfer section which transfers the images of the input image memory to the temporary memory in accordance with the transfer start position of the position memory.

Abstract: Image projection and display devices include a plurality of projectors, a projection screen forming a focusing plane for the projected images from the plurality of projectors, mutually overlapping regions existing between the images, a test image storing section for storing prescribed test images, and an image capturing section for acquiring projected test images in which a prescribed test image is projected. The devices further include a correction data calculating section for calculating correction data for correcting the input images for the respective projectors, on the basis of the acquired test images, in such a manner that a uniform or continuous brightness is achieved across the whole projection area including the overlapping regions, a correction data storing section for storing the correction data thus calculated, and an image correcting section for correcting the images input to the respective projectors, by using the correction data.

Abstract: An image recording apparatus is provided which includes a test pattern reader for reading a test pattern image recorded by respective recording heads; an image recording position error detector for detecting, from the read test pattern, an error in image recording position for each recording element of each recording head relative to a predetermined image recording position; a correction data generator for producing correction data for correcting the error in image recording position for each recording element of each recording head in accordance with the detected recording position error; a correction unit for correcting an image signal to be recorded by each recording element of each recording head, on the basis of the produced correction data; and a controller for operating the test pattern reader, the image recording position error detector, and the correction unit at a particular time.

Abstract: The invention provides an image recording apparatus for recording an image on a recording medium in accordance with an image signal, using a line-type recording head unit including a plurality of recording heads each having a plurality of recording elements disposed in a predetermined direction, wherein the plurality of recording heads are disposed in substantially the same direction as the direction in which the recording elements are disposed, and the plurality of recording heads are disposed such that there is an overlap in recording width between adjacent recording heads.

Abstract: An image formation apparatus is equipped with a recording head having a plurality of recording elements for forming an image on a recording medium. A binarized image data storage unit stores binarized image data for on-off control of the recording elements of the recording head. A correction data storage unit stores density irregularity correction data for correcting irregularities in density which occur when the recording elements of the recording head are respectively driven to form the image for each of the recording elements. A density irregularity correction unit corrects, prior to the image formation, the binarized image data stored in the binarized image data storage unit on the basis of the density irregularity correction data stored in the correction data storage unit.

Abstract: An image forming apparatus includes a recording head unit in which a plurality of recording heads are arranged in substantially the same direction as the arranging direction of recording elements such that an overlapped region is formed between the heads, a set angle/overlapped region detector which detects the width of the overlapped region of each of the plurality of recording heads from a predetermined test chart printed using the recording head unit, and an image data distributor which distributes image data input to each of the plurality of recording heads, in accordance with the detected width of the overlapped region between the heads. This apparatus achieves an effect of eliminating density unevenness in the head overlapped region only by rough head alignment.

Abstract: An image recording apparatus records an image by scanning, relatively to a recording medium, a line-type recording head unit in a direction substantially perpendicular to a predetermined direction, wherein the line-type recording head unit includes a plurality of recording heads disposed in the predetermined direction and each recording head has a plurality of recording elements disposed in a direction substantially the same as the predetermined direction and of which recording widths overlapping each other partially. The image recording apparatus includes a correction data generator for producing correction data for correcting characteristics of recording elements at two-dimensional positions on the recording medium, and an adjustment unit for adjusting an input image signal inputted to the recording elements at two-dimensional positions, on the basis of the correction data.

Abstract: Highly detailed image data from an input terminal is divided by an input image divider in accordance with projectors. The divided image data are subjected to compensation processing by an image compensator, using compensation data for the respective characteristics of the various types of output characteristics. The output characteristics are subjected to compensation processing using the compensation data for the various types of output characteristics stored in the compensation data memory unit. The image data for each projector subjected to compensation processing, after D/A conversion, are sent to respective projectors.

Abstract: In a system according to the invention, fine image data 2 created and output by a personal computer 1 is input to an image processing/dividing section 4. The image processing/dividing section 4 determines, on the basis of parameters stored in a projector arrangement storage 5, which portion of the fine image data 2 is output to which projector, thereby performing a predetermined processing. Digital signals from the image processing/dividing section 4 are input to a plurality of D/A converters 6, respectively, where the signals are converted to analog signals. Images in the form of the analog signals are projected onto a screen 8 from projectors 7a-7d. Thus, the image projected on the screen 8 is constituted of accurately positioned images, and hence is a very fine image.

Abstract: An image forming apparatus has a recording head consisting of a plurality of recording elements for forming an image on a recording medium on the basis of given image data. A density irregularity characteristics data generating section generates density irregularity characteristics data on the basis of density irregularity data of a pattern generated with use of the recording head, and a plurality of attribute data used for generating the pattern. A density irregularity correction section corrects image data by using the density irregularity characteristics data generated in the density irregularity characteristics data generating section.