| Patent Number |
Title Of Patent |
Date Issued |
| 7277585 |
Image encoding method, image encoding apparatus and storage medium |
October 2, 2007 |
| An image encoding method forms units respectively made up of a plurality of pixels belonging to within one period of a digital image data having a periodic property, and carries out an encoding using the units as units of encoding, so that two units which are consecutively encoded are |
| 7221483 |
Image encoding method and apparatus, image decoding method and apparatus, image processing appar |
May 22, 2007 |
| Image data is encoded using a block consisting of a plurality of pixels as a unit of processing. A statistics section extracts statistical information for each pixel value, from a plurality of encoded blocks adjacent to an encoding target block, at each corresponding position within |
| 7155059 |
Color image processing apparatus and color image processing method |
December 26, 2006 |
| The color image processing apparatus comprises; a compressing/extending section for compressing the BRG input signals, storing the compressed signals in the page memory, restoring the compressed BGR input signals, and outputting the restored signals; a color converting section for re |
| 7046387 |
Efficient coding of color images including monochrome images |
May 16, 2006 |
| A device for processing images includes a compressing/coding unit which encodes image data including a plurality of color components to produce fixed-length codes, a memory unit which stores therein the codes produced by the compressing/coding unit, a distribution-measurement unit which |
| 6985634 |
Image processing system for compressing image data including binary image data and continuous to |
January 10, 2006 |
| An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2.times.2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency |
| 6788811 |
Coding apparatus, decoding apparatus, coding method, decoding method, amd computer-readable reco |
September 7, 2004 |
| A coding apparatus which can simplify a coding circuit and also simplify the processing of quantization. Image data that consists of R-, G-, and B-color components read from a scanner into buffers is subjected to transformation using a position correlation for each of RGB in position |
| 6714685 |
Image processing system for compressing image data including binary image data and continuous to |
March 30, 2004 |
| An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2.times.2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency |
| 6704455 |
Image processing system and image processing method |
March 9, 2004 |
| A dividing portion divides input image data into a plurality of block data, a block expressed by each of said plurality of block data comprising a pixel matrix of the same predetermined size. A transform portion transforms each of the plurality of block data by a frequency transform |
| 6704444 |
Color image processing apparatus and color image processing method |
March 9, 2004 |
| The color image processing apparatus comprises; a compressing/extending section for compressing the BRG input signals, storing the compressed signals in the page memory, restoring the compressed BGR input signals, and outputting the restored signals; a color converting section for re |
| 6683990 |
Image data encoding apparatus |
January 27, 2004 |
| An image data encoding apparatus includes a wavelet transform unit which produces a first subband coefficient and a second subband coefficient as an output in response to each of blocks of the input image data, the first and second subband coefficients being produced by performing a mult |
| 6603884 |
Image processing system for compressing image data including binary image data and continuous to |
August 5, 2003 |
| An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2.times.2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency |
| 6556707 |
Method and apparatus for image processing for performing a color conversion |
April 29, 2003 |
| An image processing apparatus includes a converter, a calculator and a reverse converter. The converter performs a frequency conversion operation on a color image signal which includes a brightness signal and color signals and divides values of each of the brightness signal and the color |
| 6519052 |
Image processing method and apparatus to select a data compression method according to a size of |
February 11, 2003 |
| An image processing apparatus for inputting image data from an external image input device and outputting the inputted image data to an external image output device after processing the data, the image processing apparatus including a data compression device for compressing the inputted |
| 6507674 |
Image data encoding apparatus |
January 14, 2003 |
| An image data encoding apparatus includes a wavelet transform unit which produces a first subband coefficient and a second subband coefficient as an output in response to each of blocks of the input image data, the first and second subband coefficients being produced by performing a mult |
| 6480623 |
Color image processing apparatus and color image processing method |
November 12, 2002 |
| The color image processing apparatus comprises; a compressing/extending section for compressing the BRG input signals, storing the compressed signals in the page memory, restoring the compressed BGR input signals, and outputting the restored signals; a color converting section for re |
| 6459816 |
Image processing system for compressing image data including binary image data and continuous to |
October 1, 2002 |
| An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2.times.2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency |
| 5923828 |
Image forming apparatus which forms an image based on bit map data |
July 13, 1999 |
| An image forming apparatus which forms an image based on bit map data. A compressing circuit compresses the bit map data to generate compressed data by reversible compression, and the compressed data is then stored in a first storing unit, such as a frame memory. Then, a decompression |
| 5565907 |
Image forming apparatus capable of producing high quality halftone images |
October 15, 1996 |
| An image forming apparatus capable of producing a high quality halftone image stably and rendering faithful tonality. For a bilevel image, the apparatus smooths the boundary between black and white. For a multilevel image, the apparatus obviates solitary dots for thereby causing dots to |
| 5491506 |
Light quantity setting value determination with improved reliability |
February 13, 1996 |
| A light quantity sensing device senses when a light quantity emitted by a light emitting device becomes respectively equal to a plurality of different predetermined light quantities, the light quantity sensing device then providing a plurality of sensing signals corresponding to the |
| 5107278 |
Image forming apparatus |
April 21, 1992 |
| An image forming apparatus includes an image forming part for forming an image described by a video signal on a recording sheet by carrying out an image forming operation which includes scans in main and sub scan directions, a storage part for storing test pattern data which describes |
| 5019913 |
Recording apparatus having control data selectively designated in memory which corresponds to on |
May 28, 1991 |
| An image recording apparatus includes an image recording media, an optical scanning system selected from among predetermined different optical scanning systems, a first memory for storing a plurality of sets of control data respectively provided for the different optical scanning sys |
| 4977414 |
Image forming apparatus |
December 11, 1990 |
| An image forming apparatus includes a photosensitive drum, a laser diode, and an optical scanning system provided between said laser diode and the photosensitive drum, for scanning the recording medium by deflecting the light beam emitted from the laser diode to thereby form an image on |
| 4918489 |
Method of supplying recording sheets in image forming apparatus |
April 17, 1990 |
| A method of supplying recording sheets from a plurality of paper supplying units to a reference position within a main body of an image forming apparatus which forms an image on each of the sheets supplied successively from the paper supplying units via corresponding transport paths havi |
