Patent application number | Description | Published |
20090097052 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - A halftone screen applicable to an electrophotographic printer is created. Hence, minimum and maximum sizes of a halftone dot and a cluster size are input. When the halftone-dot size reaches the minimum size, the number of blackened pixels in the halftone dot is calculated. When the halftone-dot size is smaller than the minimum size, or when the number of blackened pixels doesn't reach the cluster size, and the halftone-dot size is smaller than the maximum size, the halftone dot is. When the number of blackened pixels becomes equal to or larger than the cluster size or when the halftone-dot size reaches the maximum size, a halftone screen is partitioned into polygons to have centroids of the halftone dots as kernel points. Then, each halftone dot is grown by blackening pixels to have the centroid as the center of growth. | 04-16-2009 |
20090097073 | INFORMATION PROCESSING APPARATUS, IMAGE PROCESSING APPARATUS AND METHOD THEREOF - A halftone screen which is applicable to a low-resolution electrophotographic printer is created. Hence, dot-lattice points arranged in a predetermined region are displaced using rotation processing, the predetermined region is partitioned into polygons each of which surrounds the dot-lattice point. Then, a threshold matrix used to grow a halftone dot, which is surrounded by each polygon, in a direction of the displacement is generated. | 04-16-2009 |
20090097074 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - Appropriate halftone processing is applied to respective regions without any zone segmentation of a document image formed upon mixing a photographic image, character image/line drawing, and the like. Hence, an image is input, an edge image of the image is generated, a smoothed image of the edge image is generated by smoothing processing, and lattice points having a density distribution according to the tone density distribution of the smoothed image are set. A predetermined region is partitioned into polygons, each of which surrounds one of the lattice points, and a threshold matrix used to grow a halftone dot surrounded by each polygon is generated. | 04-16-2009 |
20090251735 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - A quantizing unit, error detector, error diffusion matrix, and adder quantize a pixel of interest of an input image by an error diffusion method. A calculation unit and gain adjuster calculate a value to be added to the pixel of interest with reference to quantized pixels. The adder adds the calculated value to the pixel of interest. A control unit controls the calculation of the gain adjuster. | 10-08-2009 |
20090251736 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - A quantizing unit quantizes a pixel of interest of an input image. An error detector calculates an error generated upon quantizing the pixel of interest. An error diffusion matrix diffuses the error to non-quantized pixels, which are separated by a predetermined distance from the pixel of interest and are located in a ring pattern, based on an error diffusion matrix. | 10-08-2009 |
20090310161 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - First data, which is calculated from quantization errors of adjacent pixels of a pixel of interest in accordance with an error diffusion matrix, and second data, which is calculated from quantization results of the adjacent pixels in accordance with a reference pixel matrix and a gain coefficient, are added to color data of the pixel of interest. The color data of the pixel of interest, to which the first and second data are added, is quantized, and a quantization error of the pixel of interest is calculated from the quantization result. Different combinations of reference pixel matrices and gain coefficients are respectively used for a plurality of color component data. | 12-17-2009 |
20100091331 | IMAGE PROCESSING APPARATUS AND CONTROL METHOD THEREOF - A technique for performing high-quality cluster type FM halftone image output without “anisotropy” or “sweep out texture” phenomenon is provided. An error diffused to a current pixel position and a random number RND are added by an adder to multi-level pixel data as a subject of binarization, and supplied as pixel data Pxy to a selector. The selector compares the pixel data Pxy with thresholds, and supplies the pixel data Pxy to one of a highlight portion processor, a dark portion processor and an intermediate portion processor. The highlight and dark portion processors refer to already-binarized results within a range determined in accordance with the value of the input pixel data Pxy, and determine a binarization result Qxy. The intermediate portion processor compares a threshold, which monotonously increases in accordance with the value of the pixel data Pxy, with the pixel data Pxy, thereby determines the binarization result Qxy. | 04-15-2010 |
20120182585 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - A quantizing unit, error detector, error diffusion matrix, and adder quantize a pixel of interest of an input image by an error diffusion method. A calculation unit and gain adjuster calculate a value to be added to the pixel of interest with reference to quantized pixels. The adder adds the calculated value to the pixel of interest. A control unit controls the calculation of the gain adjuster. | 07-19-2012 |
Patent application number | Description | Published |
20090116563 | MIXED VIDEO DELIVERING APPARATUS AND METHOD, AND COMPUTER STORAGE MEDIUM - There is provided with a mixed video delivering apparatus, including: a video receiving unit receiving first to Nth encoded video data from first to Nth terminals; a decoding unit decoding the first to Nth encoded video data; a video mixing unit mixing first to Nth decoded video data to obtain mixed video data to be transmitted to a terminal “A” out of the first to Nth terminals; an encoding parameter storage storing first to Nth encoding parameters which are used for encoding the first to Nth videos by the first to Nth terminals; an encoding parameter selecting unit selecting an encoding parameter which is used by any one of terminals other than the terminal A; an encoding unit encoding the mixed video data with a selected encoding parameter to obtain encoded mixed video data; and a video transmitting unit transmitting the encoded mixed video data to the terminal A. | 05-07-2009 |
20130002521 | SCREEN RELAY DEVICE, SCREEN RELAY SYSTEM, AND COMPUTER -READABLE STORAGE MEDIUM - According to one embodiment, a screen relay device includes a communication unit that receives first image information from relay source devices, and transmits second image information to a relay destination device, a determining unit that determines a storage area of the first image information in a first storage unit, a rendering unit that renders the first image information in the determined storage area, and a screen transfer unit. The screen transfer unit compares the first image information corresponding to an updated region where the image information stored in the first storage unit has been updated by the rendering of the rendering unit and the second image information corresponding to the updated region to extract a difference region, and writes the first image information of the difference region to a second storage unit as the second image information. | 01-03-2013 |
20130077878 | IMAGE RELAY APPARATUS AND IMAGE RELAY METHOD - According to one embodiment, an image relay apparatus includes a reception unit, a determination unit and a transmission unit. The reception unit receives compressed image data from a relay source apparatus. The determination unit determines whether or not the compressed image data is processable through a first path not involving decompression of the compressed image data, based on data on a relay destination apparatus. The transmission unit transfers, to the relay destination apparatus, either the compressed image data processed through the first path or recompressed image data obtained by processing the compressed image data through a second path involving decompression, drawing, and recompression of the compressed image data. | 03-28-2013 |