Patent application number | Description | Published |
20090040538 | Image Processing Apparatus and Image Processing Method - An image is classified into a letter/linework area, a specific image area, and a background area. An area that at least partially includes the letter/linework area but does not include the specific image area is set as a first area, while an area that at least partially includes the specific image area is set as a second area. In the first area, dots on each line are formed with one nozzle. In the second area, dots on each line are formed with at least two nozzles. This arrangement enables high-speed printing for images mainly consisting of letters and graphs, while enabling high-quality printing for images including photographs. | 02-12-2009 |
20090067006 | Tint block image generation program and tint block image generation device - A image generation device generates, on a print medium, an image including a first image portion and a second image portion. The device has a first screen processing unit which generates image data by an area modulation screen having a first screen ruling, for pixels of the first image portion; and a second screen processing unit which generates image data by an area modulation screen or a density modulation screen having a second screen ruling which is higher than the first screen ruling for pixels of the second image portion. And the first screen processing unit generates a halftone dot at a center of gravity position of an image of the first image portion in a cell corresponding to a halftone dot formation area in the area modulation screen processing. | 03-12-2009 |
20090086229 | Image Processing Device and Pixel Attribute Identification Method - The printer of the invention performs an area classification process to classify each pixel included in an input image read by a scanner as a pixel in an edge component area or a pixel in a halftone dot area, and performs a correction process with a spatial filter suitable for each area. The area classification process calculates a difference value between luminance values of two arbitrary pixels selected among peripheral pixels in a specific pixel range around each target pixel according to each of multiple differential patterns t, compares the calculated difference value with threshold values provided for each differential pattern t to compute multiple difference detection values ht(x) corresponding to the multiple differential patterns t, and gives weights to the computed difference detection values ht(x) to compute a comprehensive difference detection value H(x). The area classification process identifies whether the target pixel is a pixel in the edge component area or a pixel in the halftone dot area, based on the computed comprehensive difference detection value H(x). This arrangement enables high-speed identification of the attribute of each pixel included in an image by such simple operation, while enabling identification of pixel attribute with high accuracy. | 04-02-2009 |
20090091809 | Image Processing Device, Method and Program Product - First integrated data is generated using tone value data. The tone value data represents respective tone values of pixels of an image. The first integrated data represents respective first pixel values of the pixels. The first pixel value is associated with sum of tone values of pixels within a rectangle in the image. The rectangle has two opposing corners represented by a pixel corresponding to the first pixel value and a reference pixel respectively. The reference pixel is a pixel at a predetermined corner of the image. A calculation process is executed. The calculation process includes calculation of a first calculation value of a target rectangle area using the first integrated data. The first calculation value is correlated to sum of tone values within the target rectangle area. The target rectangle area is enclosed by a rectangle defined by pixel boundary lines. The pixel boundary lines represent boundary lines between neighboring pixels in the image. Image processing in relation to the target rectangle area is executed in accordance with the result of the calculation process. In the calculation of the first calculation value, the first calculation value is calculated using respective first pixel values of four calculation pixels. The four calculation pixels are respectively adjacent to four vertexes of the target rectangle area in the direction of the reference pixel. The four vertexes are on the pixel boundary lines. | 04-09-2009 |
20090201520 | Image Processing for Determining Dot Formation States in Printing an Image - An image processing apparatus for determining formation states of dots in printing an image based on an image data using dots of a plurality of sizes includes a storage and a dot formation state determination unit. The storage stores a width correspondence table that indicates correspondence relationships between a plurality of dot sequences representing combinations of dots of specific color along a prescribed direction, and width along the prescribed direction of dot areas composed of dots that are formed on a printing medium in accordance with the dot sequences. The dot formation state determination unit determines formation states of the dots based on the correspondence relationships indicated in the width correspondence table. | 08-13-2009 |
20090284797 | Image Printing System, Image Printing Method, and Computer-Readable Medium - An image printing system which determines dot forming condition when printing an image containing a plurality of pixels by using dots of a plurality of sizes includes: a fine drawing detecting unit which detects a dot color fine drawing pixel having a dot color used for printing the image and positioned on a fine drawing portion having a drawing width equal to or smaller than a predetermined value; an edge area detecting unit which detects a dot color edge area pixel having a dot color used for printing the image and positioned at a distance equal to or shorter than a predetermined value from an edge of the image; a first dot allocating unit which allocates dots such that a dot of predetermined size in the dots of the plural sizes can be formed for the dot color fine drawing pixel during printing the image; and a second dot allocating unit which allocates dots such that a dot of a size determined according to the distance from the edge of the image in the dots of the plural sizes can be formed for the dot color edge area pixel not corresponding to the dot color fine drawing pixel during printing the image. | 11-19-2009 |
20100014121 | Printing Apparatus, Printing Method, and Recording Medium - There is provided a printing apparatus that prints an image constituted by a plurality of pixels. The printing apparatus includes a sum correspondence value calculating unit that calculates a sum correspondence value on the basis of a sum value of saturation evaluating values of pixels located within a rectangle in which a corner adjacent to an arbitrary pixel within the image and a corner adjacent to a reference pixel within the image become opposing corners for the arbitrary pixel, a rectangle sum value calculating unit that calculates a sum value within the rectangle on the basis of the sum correspondence value for adjacent pixels that are adjacent to four vertexes of an arbitrary target rectangle of the image for a target pixel located in a predetermined position within the target rectangle, an attribute determining unit that determines the attribute of the target pixel in the image based on the sum value within the rectangle for the target pixel, and a print control unit that prints image data for which image processing on the basis of the attributes of the pixels is performed. | 01-21-2010 |
20110075101 | Projector, Projection System, and Method for Controlling Projection System - A projector projecting an image includes: an imaging unit taking an information transmission image which is part of a projected image of the other projector and includes drive condition information of the other projector; and a control unit changing drive conditions of the projector based on the drive condition information included in the information transmission image. | 03-31-2011 |