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| Number | Title | Issue Date |
| 7626731 | Dot analysis device, dot analysis program storage medium, and dot analysis method A dot analysis apparatus includes a dot converging section that converges individual dots forming a dot image toward their respective centers, a selecting section that selects plural dot units each consisting of one main dot and plural sub-dots surrounding the main ... | 12/01/2009 |
| 7595911 | Methods and systems for descreening a digital image Embodiments of the present invention comprise methods and systems for descreening a digital image. ... | 09/29/2009 |
| 7583412 | System and method for creating patterned encoded halftones An embodiment described below provides a system that allows a user to provide an exact implementation or a close approximation to any desired Holladay dot to a printer with super-resolution encoding (SRE)/decoding (SRD) capabilities. In particular, the embodiment co... | 09/01/2009 |
| 7532363 | Apparatus and methods for de-screening scanned documents Apparatus and methods for de-screening an image signal utilizing a bank of filters to provide several increasingly blurred versions of the original image signal is disclosed. At any given time, one or more of the blurred versions are created, on a pixel-by-pixel bas... | 05/12/2009 |
| 7433084 | Digital de-screening technique for scanned documents A method and system for de-screening an image signal utilizing a bank of filters to provide several increasingly blurred versions of the original image signal is disclosed. At any given time, only two of these blurred versions are created, on a pixel-by-pixel basis.... | 10/07/2008 |
| 7375856 | Halftone screen frequency and magnitude estimation for digital descreening of documents An efficient method and system for eliminating halftone screens from scanned documents while preserving the quality and sharpness of text and line-art is disclosed. The method and system utilizes one or more independent channels with different sensitivities (e.g., M... | 05/20/2008 |
| 7365882 | Halftone screen frequency and magnitude estimation for digital descreening of documents A highly efficient method and system for eliminating halftone screens from scanned documents while preserving the quality and sharpness of text and line-art is disclosed. The method and system utilizes a single channel screen frequency estimator module, which genera... | 04/29/2008 |
| 7333672 | Image processing system/network which performs recognition process only upon regions having higher high spatial frequency content An image recognition process applied to a photograph is preceded by a pre-processing step which identifies parts of the image which are in focus. The recognition process is then limited to those parts. The pre-processing typically operates by creating a measure of h... | 02/19/2008 |
| 7333118 | Device and method for processing an image to be displayed with a reduced number of colors A method and a device for processing an image to be displayed with a reduced number n of color components are disclosed. The method comprises, for at least one of the color components, a reduction operation that is carried out by means of a dynamic round off depende... | 02/19/2008 |
| 7327898 | Reducing boundary effects for images with screen patterns A method is disclosed which reduces the boundary effects on an image based on maintaining local gray. The image is first halftoned and an adjustment is then made at the boundary region to minimize the brightness deviation of the halftone from the original contone. T... | 02/05/2008 |
| 7324247 | Image processing apparatus, image processing program and storage medium storing the program An image processing apparatus includes a reduced image generating part generating a reduced image having a lower resolution than that of an original digital image. A first extracting part distinctly extracts a first foreground image and a first background image from... | 01/29/2008 |
| 7312900 | Method of descreening screened image, method of separating screened image into regions, image processing device, and program A method of performing a descreening process with high accuracy by separating a first region from which a gradation area is to be derived and a second region from which a monotone area is to be derived from each other in a screened image with high accuracy is provid... | 12/25/2007 |
| 7274486 | Image data correcting device for correcting image data to remove back projection without eliminating halftone image An image data correcting device eliminates a back projection image without eliminating an image corresponding to a low-intensity halftone image. An intensity difference detection part detects an intensity difference between first image data corresponding to a part o... | 09/25/2007 |
| 7251059 | System for distinguishing line patterns from halftone screens in image data In a system, such as in a digital copier, for classifying image data derived from an original image, the image data is classified by type. An algorithm is applied to the gray levels of pixels surrounding each pixel of interest. The algorithm determines whether a loc... | 07/31/2007 |
| 7245780 | Group average filter algorithm for digital image processing This present invention discloses a system and method for enhancing images of barcodes and other similar objects taken by the digital camera connected to or embedded in a mobile device. This filter works by converting the image into its equivalent gray scale. The alg... | 07/17/2007 |
| 7242816 | Group average filter algorithm for digital image processing This present invention discloses a system and method for enhancing images of barcodes and other similar objects taken by the digital camera connected to or embedded in a mobile device. This filter works by converting the image into its equivalent gray scale. The alg... | 07/10/2007 |
| 7239430 | Binary halftone detection 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 summe... | 07/03/2007 |
| 7228002 | Inverse halftoning process Performing inverse halftoning on a halftoned image includes smoothing the halftoned image using a two-dimensional filter to produce a smoothed image, detecting edge areas in the smoothed image, performing lowpass filtering on non-edge areas of the smoothed image, an... | 06/05/2007 |
| 7224486 | Image conversion method, image conversion apparatus, and image conversion program storage medium In an image conversion method of performing an image conversion between binary area tonal image-to-binary area tonal image, an image conversion apparatus, and an image conversion program storage medium storing an image conversion program which causes a computer to o... | 05/29/2007 |
| 7221799 | Image processing based on degree of white-background likeliness An image processing device includes a filtering unit which filters an input image with variable frequency characteristics, an edge detection unit which detects magnitudes of edges appearing in the input image, and a degree-of-white-background-likeliness detection un... | 05/22/2007 |
| 7218418 | Digital de-screening of documents A method and a system for de-screening an image signal. The system comprises a filter bank, a control module and a blend module. The filter bank filters the image signal and produces a set of filter output signals. The control module generates at least one control s... | 05/15/2007 |
| 7187475 | System and method for a robust de-screening filter A method and apparatus for de-screening a halftone image, therefore allowing the recovery of an approximation of an original image, is disclosed. A method according to one embodiment first performs a screen conversion filter upon a scanned representation of the half... | 03/06/2007 |
| 7170641 | Method of generating medium resolution proofs from high resolution image data A method provides for determining an optimal sample dimension when descreening high-resolution image data so that a lower resolution image color proof may be created without suffering the problems typical of over sampling image data. The method allows to generate a ... | 01/30/2007 |
| 7164504 | Image 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 |
| 7148998 | System and method for automatic descreening of digital images A system and method for automatic descreening of a digital image is disclosed. The method comprises automatically detecting, prior to a final scan of the document, the presence of a predefined visual artifact in a sample region of an image of the document being scan... | 12/12/2006 |
| 7139437 | Method and system for removing artifacts in compressed images In a method for removing artifacts in a digital image that has been decoded from a compressed representation of the image, the pixels of the digital image are segmented into low detail pixels, high detail pixels, and boundary pixels, and then a single non-linear fil... | 11/21/2006 |
| 7139101 | Anisotropic stochastic screen A system and method for the halftoning of gray scale images by utilizing a pixel-by-pixel comparison of the image against an anisotropic stochastic screen is disclosed. The anisotropic stochastic screen comprises a non-deterministic, non-white noise function which, ... | 11/21/2006 |
| 7126722 | Image data conversion method and apparatus This invention is to correct a difference of dot gain between output devices. This invention for converting binary data for a first output device to binary data for a second output device includes the steps of: converting the binary data for the first output device ... | 10/24/2006 |
| 7116446 | Restoration and enhancement of scanned document images Processing of a pixel in a digital image includes performing inverse halftoning on the pixel with respect to a local pixel neighborhood; and performing selective sharpening on the inverse halftoned pixel with respect to the local pixel neighborhood. ... | 10/03/2006 |
| 7092120 | Image transformation apparatus and image transformation program storage medium An image transformation apparatus for performing a transformation processing for outputting a color image by an image output device such as a color printer. The image transformation apparatus has an image receiving section for receiving an image represented by digit... | 08/15/2006 |
| 7085422 | Layer based compression of digital images A method for image separation of an image, wherein the image includes pixels, and the method includes identifying kernels, whereby characteristics of the kernels are reflected by at least one of the following operators, P(x−w,y)−P(x,y)>t AND P(x+w, y)−P(x,y)>t... | 08/01/2006 |
| 7085015 | Inverse halftoning for multi-level halftones Techniques for recovering an original image from its halftone version using information obtained from the dither matrix used to generate the halftone. The techniques involve determining a bounding region defined by (xmin, xmax) for each pixel l... | 08/01/2006 |
| 7085016 | Method and apparatus for dithering and inversely dithering in image processing and computer graphics The invention provides a method and an apparatus for dithering, and inversely dithering an image. The apparatus makes use of a pixel address and a pixel data to locate a dither reference value from a dither matrix and use the dither reference value to convert an ori... | 08/01/2006 |
| 7068398 | System and method for efficient tile generation from complex raster data A system and method for accepting raster data from a Postscript or equivalent image data generator, identifying portions of the raster image which contain continuous tone data and linework data, dividing those portions into separate tiles and compressing the data wi... | 06/27/2006 |
| 7054037 | Method and apparatus for dithering or undithering data words in a data stream Method and apparatus for dithering and undithering data words in a data stream. The method comprises the steps of processing a data word in a data stream to obtain an output data word by calculating (14) a first difference, calculating (16) a second di... | 05/30/2006 |
| 7050200 | Lookup table for adjusting dot-gain on bitmap files based on average number of dots A method for adjusting dot-gain for a halftone binary bitmap file by inputting a halftone binary bitmap file comprising binary pixels to a digital filter, filtering the binary pixels with the digital filter generating a weighted sum of the binary pixels producing a ... | 05/23/2006 |
| 7044663 | Print method and system to obtain high quality image using less data quantity A printer is permitted to obtain printed matter of high picture quality from print data transferred in the state changed into 1 bit for the purpose of shortening data transfer time. A multi-value conversion unit (23) converts CMYK respective 1 bit binary data... | 05/16/2006 |
| 7024041 | Pattern inspection apparatus and method A marginal distribution feature extraction unit 20 sequentially focuses on each pixel in a reference image and the corresponding pixel in an inspection image, and computes a marginal distribution feature value indicative of the spatial variation in pixel valu... | 04/04/2006 |
| 7003157 | Sheet handling system A sheet handling method and a sheet handling system in which various types of sheets can be easily determined in a short period of time, which contributes to increasing efficiency in subsequent application processing in a financial institution or the like. The syste... | 02/21/2006 |
| 6992789 | Method, system, and program for managing a multi-page document Provided is a method, system, and program for managing a multi-page document. A plurality of input files are received including digital representations of multiple pages of a document. The content of each entire page is represented in a first representation format. ... | 01/31/2006 |
