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Class 358/3.15 - Edge adaptive


Subclass of Class 358 - Facsimile and static presentation processing
Definition: Subject matter wherein dithering is adapted to an edge
No. of patents: 86
Last issue date: 12/27/2011


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NumberTitleIssue Date
8085439Method and device for processing a print data flow for producing multicolor printed images using a high performance printing system
In a method/device for preparing a print data stream for generation of print images with at least two primary colors, the print data contained in an input print data stream are supplied to a processing stage as input print data. The input print data are processed wi...
12/27/2011
8054506Image forming apparatus and image quality enhancement method thereof
An image forming apparatus provides enhancement of image quality. The image forming apparatus includes a window generating unit to generate a main window of a predetermined size using a Lines Per Inch (LPI) and an angle of a dithering mask, and to generate a plurali...
11/08/2011
7916351Image processing apparatus and method, printer device, and computer readable recording medium
An image information acquisition unit obtains first print image information that is binarized with the use of a first threshold matrix. A threshold matrix information acquisition unit obtains information representing the first threshold matrix. A determining unit di...
03/29/2011
7602531Halftone edge enhancement for production by an image forming device
Digital images that are produced by an image forming device may be processed using an edge enhancement technique to reduce the effects of halftone color depth reductions. For each element in the original image, certain detail elements are classified by examining the...
10/13/2009
7586650Image processing apparatus and image processing method
An image processing apparatus provided with: an edge correction unit for, based on a level of a pixel value of an edge area of an image, correcting the pixel value of the edge area of the image; and a halftone processing unit for carrying out a first halftone proces...
09/08/2009
7443543Image processing apparatus and image processing method
A smoothing process is performed on image data to obtain improved image quality. Output image data is switched among image data subjected to smoothing, image data subjected to second bit conversion, and image data subjected to pseudo halftone representation process....
10/28/2008
7414757Method for compressing printing hint data sent to a printer
There is disclosed in embodiments methods relating to the compression of printing hints. The method in embodiments generates a first set of image pixels having corresponding printing hints. The printing hints are then adjusted to produce a second set of image pixels...
08/19/2008
7355755Image processing apparatus and method for accurately detecting character edges
An image processing apparatus includes an edge amount calculating device configured to calculate edge amounts of an image in a plurality of directions for each of a plurality of frequency bands of the image. A character edge area determination device determines, bas...
04/08/2008
7352490Method and system for generating contone encoded binary print data streams
A method and system to convert an electronic image file described in a page description language containing both contone and non-contone image objects to an intermediate binary format image. The intermediate format image separately encodes the contone and non-conton...
04/01/2008
7349126System with a random number generator used to remove contouring in CMOS imager data having an extended dynamic range
The present invention is a method of image data processing that includes determining whether the image data indicates photodiode saturation, and removing contouring from the image data caused by the saturation. The contour artifact removal is accomplished by adding ...
03/25/2008
7345792Segmentation-based halftoning
A method for selecting a halftoning mode to be applied to regions within an image. The method operates on received image data to identify low-level regions within the received image data. The low-level regions are defined and separated by edges. Pixels that are not ...
03/18/2008
7336400Transforming an input image to produce an output image
An input image is transformed to produce an output image. Pixels occurring at edges that represent detail within the input image are detected to produce an intermediate image. Background fill representing textures of the input image is generated. The background fill...
02/26/2008
7330191System for secure text display
Techniques for securely displaying text on a display panel involve destroying spatial and temporal correlations in an otherwise uniform visual field. The techniques render the displayed text secure with respect to attempts to copy the text using a video capture devi...
02/12/2008
7317842Global and local statistics controlled noise reduction system
A global and local statistics controlled noise reduction system in which the video image noise reduction processing is effectively adaptive to both image local structure and global noise level. A noise estimation method provides reliable global noise statistics to t...
01/08/2008
7292374Method and apparatus for image processing capable of efficiently performing a gray-scale correction
A novel image forming apparatus which makes gray-scale by performing at least one of operations including a manipulation of a plurality of dots arranged in a form of matrix, a single-dot-based density adjustment, or a single-dot-based size adjustment, includes a dot...
11/06/2007
7283275Logo data generating apparatus, logo data generating method, and data storage medium
A logo data generating apparatus and method easily generate logo data suitable for storage to and output by a particular target printer without requiring a complicated process defining the image processing and data communication parameters. An control data receiving...
10/16/2007
7236269System and method for dithering with reduced memory
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 ar...
06/26/2007
7230742Image data interpolating apparatus and medium on which data interpolating program is recorded
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 imag...
06/12/2007
7227670Method of selective edge softening and rendering for the suppression of halo
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 swa...
06/05/2007
7209244Post RIP image rendering in an electrographic printer to minimize screen frequency sensitivity
A method of printing multiple images with differing line screen frequencies with a printer is print sensitive to differing line screen frequencies, the method comprising the steps of: converting the images into a digital bitmap comprised of an array of pixels wherei...
04/24/2007
7206446Image processing apparatus
An image processing apparatus includes an edge detecting portion for detecting an edge area of an input image signal and a lightness and chroma detecting portion for detecting a low lightness and low chroma area of the input image signal. An image processing such as...
04/17/2007
7190830Image processing method, apparatus and memory medium therefor
Correction for color fog is securely achieved with limited load of processing. The RGB image data are converted into the luminance Y and the chromaticity values C1, C2, then a highlight point and a shadow point are determined and are connected to defin...
03/13/2007
7180636Image processor and method
The present invention relates to an image processor provided in apparatuses such as digital copiers and printers, and that distinguishes between a character edge region and a continuous tone region of an original image and switches the tone reproduction processing b...
02/20/2007
7170642Image processing apparatus and method for improving output image quality
An image processing apparatus includes a first filtering process device configured to perform a predetermined space frequency characteristic conversion process to input image data having multiple-level gradation. A conversion process device performs a gradation char...
01/30/2007
7164504Image processing apparatus, image processing method and computer program product for image processing
An image processing apparatus processes image data which is obtained by reading an halftone dot image. In the image processing apparatus, the image data is separated into the image data corresponding to halftone dots which form the halftone dot image and other image...
01/16/2007
7146045Image processing method and apparatus and storage medium
Software of a simple configuration checks whether an original image to be corrected is an image picture, and an image correction process based upon a formed histogram of the original image is not performed for an image different from the image picture. An image proc...
12/05/2006
7142330Image processing method, image processing apparatus and recording medium
An image processing method of quantizing multi-tone image data by an error diffusion method, includes the steps of a) detecting change of the image data; and b) oscillating cyclically in image space a threshold for the quantization in an oscillation range controlled...
11/28/2006
7127103Image processing apparatus and image forming apparatus and image processing method and image forming method
A trapping means judges that the gradated region is dark if compared with the uniform region and expands the uniform region to cause colors to overlap when the density average value Da of the gradated region is greater than the density value Du of the uniform region...
10/24/2006
7116447Halftone dot-growth technique using a dot edge-detection scheme
A method for color correcting an original halftone bitmap image by a predefined color correction function to produce a color corrected halftone bitmap image comprising: providing an original halftone bitmap image; estimating the dot area percentage of the original h...
10/03/2006
7085003Fringe field tailoring with sub-pixel patterns for improved print quality
Utilization of fringe field tailoring pixels with sub-pixel patterns are introduced into the bitmap of an image to obtain local control of the normal and tangential electric fields and thereby improve image development. These fringe field tailoring pixels embody mul...
08/01/2006
7075680Image processing system, image forming system, and recording medium
A maximum color identifying portion 41 identifies a maximum color from coloring material colors used to reproduce a color of a line segment after color conversion into coloring material colors by a character/line color converting portion 31 is applied ...
07/11/2006
7075677Ink jet fault tolerance using oversize drops
A printing method identifies where parts of an image will not be printed correctly due to partial or total device failure and if possible adjusts the size of ink dots in adjacent rows or columns so as to lessen the visual effect of failure to print at the original l...
07/11/2006
7064866Image forming apparatus selectively applying a smoothing operation to image data
An image forming apparatus can apply a smoothing process to multiple value image data without generation of errors due to an unnecessary smoothing process. A template matching process unit determines whether or not the original image data is to be subjected to a smo...
06/20/2006
7046390System and method for scaling and enhancing color text images
A system and method for scaling and enhancing color text images utilizes a binary scaling and text enhancing technique by first converting an input color text image to a binary image, i.e., black-and-white image. The scaled and text enhanced image is subsequently co...
05/16/2006
7016073Digital halftone with auxiliary pixels
Utilization of non-printing high-spatial-frequency auxiliary pixels are introduced into the bitmap of halftones utilized in an image to obtain local control of the image development by modification of local average voltage in the development nip. These auxiliary pix...
03/21/2006
7016080Method and system for improving scanned image detail
Methods are provided for generating a dynamic image mask for improving image detail in a digital image. An electronic representation of an image is scanned. A dynamic image mask is generated from the electronic representation of the image. The dynamic image mask has...
03/21/2006
6999202Method for generating a halftone of a source image
In one aspect of the present invention, a method is provided for producing a halftone of a source image. The halftone includes halftone pixels. The halftone pixels are suitable for containing halftone dots. The method selects glyphs corresponding to intensities of r...
02/14/2006
6992798Apparatus, product, and method of trapping using a distance buffer
A method, apparatus, and product to generate trap areas. One embodiment is a method for generating a trap pixel of a trap area surrounding one or more trapping edges of an image that includes, for each trapping edge in the image, and for each pixel within a predefin...
01/31/2006
6982799Creating composite page images from compressed data
A printhead controller controls printing of a page by at least one printhead. The printhead controller, in use, receives data, in a compressed format relating to the page to be printed, the data including a page description comprising a bi-level black layer and a co...
01/03/2006
6980324Apparatus and method for generating multicolor image
When a multicolor image indicated by image data is generated, a signal for generation of a monochrome image according to the image data is amended according to the information about the monochrome image contained in the image data and according to the information ab...
12/27/2005
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