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| Number | Title | Issue Date |
| 7444029 | Image predictive coding method An image predictive coding apparatus and method, image predictive decoding apparatus and method, and recording medium for performing an image predictive coding method or the image predictive decoding method, of which the transform efficiency is remarkably improved i... | 10/28/2008 |
| 7440631 | Method of compressing digital images acquired in CFA format A method of compressing digital images acquired in CFA format that utilizes optimized quantization matrices. The method, basing itself on the statistical characterization of the error introduced during the processing phase that precedes compression, appropriately mo... | 10/21/2008 |
| 7437008 | Image predictive coding method An image predictive coding apparatus and method, image predictive decoding apparatus and method, and recording medium, of which the transform efficiency is remarkably improved in comparison with the prior art. According to the image predictive coding apparatus and m... | 10/14/2008 |
| 7437011 | Image processing apparatus and method A color-space conversion processor converts input digital image data into YUV color space, and a wavelet conversion processor performs wavelet conversion processing on the data. A face-area recognition processor extracts a face area in the image based on the obtaine... | 10/14/2008 |
| 7433532 | Max entropy optimized retinal camera An enhanced entropy camera provides enhanced image quality by utilizing a custom analog-to-digital conversion function. The analog-to-digital conversion occurs according to a custom non-linear quantization function that provides enhanced entropy in the digitized ima... | 10/07/2008 |
| 7433531 | Image pickup apparatus and method The present invention relates to an image capturing apparatus and method in which the image recording time is reduced and the memory capacity required for compression is also reduced. A number-of-bytes calculation unit 302 determines the number of bytes after... | 10/07/2008 |
| 7430330 | Method and apparatus for optimizing a JPEG image using regionally variable compression levels A method of JPEG compression of an image frame divided up into a plurality of non-overlapping, tiled 8×8 pixel blocks Xi. A global quantization matrix Q is determined by either selecting a standard JPEG quantization table or selecting a quantization tabl... | 09/30/2008 |
| 7424163 | System and method for lossless image compression A method of lossless image data compression including the steps of: (a) receiving an image; (b) forming a residual image by differencing adjacent samples of the received image; (c) forming multiple bitplanes directly from the residual image; (d) predicting polaritie... | 09/09/2008 |
| 7424158 | Image predictive coding method There is disclosed image predictive coding apparatus and method, image predictive decoding apparatus and method, and recording medium which stores therein the image predictive coding method or the image predictive decoding method, of which the transform efficiency i... | 09/09/2008 |
| 7420570 | Methods and systems for video processing using super dithering A super dithering method of color video quantization maintains the perceived video quality on a display with less bit depth of color than the input video. Super dithering relies on both the spatial and temporal properties of human visual system, wherein spatial dith... | 09/02/2008 |
| 7420708 | Method for processing color image data employing a stamp field A method for processing image data that employs a stamp field that contains data representing a distance metric for use with a variety of error diffusion operations. The distance metric possesses distance-order preservation permitting the distance from a previous do... | 09/02/2008 |
| 7421135 | Image data compression device and encoder An image data compression device includes: a quantization section which quantizes image data in unit of a frame; a FIFO buffer section in which quantized data for at least N frames (N is an integer larger than one) quantized by the quantization section is buffered; ... | 09/02/2008 |
| 7421132 | Image compressor for generating predicted difference code having fixed bit length by requantizing with coarser quantization steps An image compressor of the present invention includes a difference calculating unit and a difference requantizing unit. The difference calculating unit calculates a predicted difference between a pixel value of image data and a predicted value (a calculated value of... | 09/02/2008 |
| 7418148 | Image compression method and image compression device An image compression device provided for effective utilization of the memory used for image storage and for attaining a reduction in the compression processing time of an image. An image quality evaluation value calculation section calculates the image quality evalu... | 08/26/2008 |
| 7418144 | Curved wavelet transform for image and video compression A curved wavelet transform and a related image/video compression system are disclosed. The curved wavelet transform (CWT) is carried out by applying one-dimensional (1-D) wavelet filters along curves, rather than along only horizontal and vertical directions. The im... | 08/26/2008 |
| 7418147 | Cauchy-distribution based coding system and method Embodiments of a coding system and method are disclosed. One method embodiment includes determining a Cauchy-based probability density function fit to a statistical distribution of coefficients generated from a transformed image frame block that are to be quantized,... | 08/26/2008 |
| 7415161 | Method and related processing circuits for reducing memory accessing while performing de/compressing of multimedia files Method and apparatus for reducing memory access while de/compressing multimedia files, videos, or image files. An image is divided into blocks, and a frequency data matrix corresponding to a frequency transformed and quantized block is stored in a memory for later d... | 08/19/2008 |
| 7412100 | Apparatus and method for sub-sampling images in a transform domain A method of receiving a bit-stream and extracting data from the bit-stream based on one or more criteria and sub-sampling (for example, filtering and decimating) the extracted data in the transform domain. The method either stores the data for future transmission or... | 08/12/2008 |
| 7409098 | Image processing apparatus and method for coding with complexity-based quantization An image processing apparatus is provided that can define the change amount of a quantizing parameter by suitably reflecting the complexity of image data in the case, when the quantizing parameter is increased a predetermined unit amount, the coarseness the image da... | 08/05/2008 |
| 7409097 | Video encoding using variable bit rates A system and method is provided for variable bit rate encoding using a complexity ratio. Quantization parameter is calculated using a complexity ratio, which is equal to a local complexity divided by a global complexity. Complex pictures are allocated a larger bit b... | 08/05/2008 |
| 7394940 | Digital video media duplication or transmission quality measurement A system and method for measuring video quality of a video image, wherein the system comprises a source device comprising an original video image; a receiver comprising a received video image; a storage device adapted to store video images from the source device and... | 07/01/2008 |
| 7394941 | Image predictive coding method There is disclosed image predictive coding apparatus and method, image predictive decoding apparatus and method, and recording medium which stores therein the image predictive coding method or the image predictive decoding method, of which the transform efficiency i... | 07/01/2008 |
| 7391916 | Quantization matrix adjusting method for quality improvement A quantization matrix adjusting method for quality improvement by scaling down the default quantization matrix. The adjusting method comprises the steps of: updating a used bits BB_X and an average quantizer scale Avg_Q; allocating a bit budget BB_C for a current pi... | 06/24/2008 |
| 7391914 | Decoding of predicted DC coefficient without division A technique for eliminating the division in decoding a predicted DC coefficient includes calculating and storing the values of 1//DC_scalar in a table. This allows one to convert a division into a multiplication. ... | 06/24/2008 |
| 7391918 | Fixed, variable and adaptive bit rate data source encoding (compression) method According to the invention, quantization encoding is conducted using the probability density function of the source, enabling fixed, variable and adaptive rate encoding. To achieve adaptive encoding, an update is conducted with a new observation of the data source, ... | 06/24/2008 |
| 7391909 | Data manipulation A method for performing a reordering operation on a matrix of input data values, the method comprising: loading the data values into a computer store by forming a plurality of data strings, each data string comprising a plurality of data sub-strings and each data su... | 06/24/2008 |
| 7388995 | Quantization matrix adjusting method for avoiding underflow of data A quantization matrix adjusting method for avoiding underflow of VBV by enlarging the default quantization matrix. The adjusting method comprises the steps of: updating a used bits BB_X and an average quantizer scale Avg_Q; allocating the bit budget BB_C for the cur... | 06/17/2008 |
| 7386181 | Image display apparatus An image processing apparatus includes a gradation quantization processing in a case of performing a region dividing processing in the animation of a moving picture and in an object extraction, in which frequency histograms are created for each frame, a judgment is ... | 06/10/2008 |
| 7382925 | Compression and decompression system with reversible wavelets and lossy reconstruction A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method ... | 06/03/2008 |
| 7376271 | Method for quantization of histogram bin value of image A method for quantization of a color histogram bin value of an image or video, and more particularly, a method for non-uniform quantization of a color histogram bin value of an image (or video) according to the frequency of color occurrence is provided. The methods ... | 05/20/2008 |
| 7372600 | Color facsimile device with data recompressing capability JPEG data is efficiently recompressed and transmitted to a remote color facsimile device. Before transmission of recompressed JPEG data, an anticipated transmission time is displayed for enabling the user to easily select the desired compression ratio. To generate r... | 05/13/2008 |
| 7372903 | Apparatus and method for object based rate control in a coding system A method and apparatus for selecting a quantizer scale for each object within a frame to optimize the coding rate is disclosed. A quantizer scale is selected for each region or “object” within each frame such that the target bit rate for the frame is achieved wh... | 05/13/2008 |
| 7372377 | Method and apparatus for position identification in runlength compression data A position in runlength compression data corresponding to a desired position in original data can be found fast. Index correspondence information is generated for representing correspondence between indexes representing predetermined positions in data arrangement of... | 05/13/2008 |
| 7372906 | Compression circuitry for generating an encoded bitstream from a plurality of video frames Data is discrete cosine transformed and streamed to a processor where quantized and inverse quantized blocks are generated. A second streaming data connection streams the inverse quantized blocks to an inverse discrete cosine transform block to generate reconstructe... | 05/13/2008 |
| 7373001 | Compressed moving image decompression device and image display device using the same A moving image compression (or encoding) device including: a hardware processing section which compresses moving image data by hardware; a data storage section which stores the moving image data processed by the hardware processing section; and a software processing... | 05/13/2008 |
| 7372485 | Digital camera device and methodology for distributed processing and wireless transmission of digital images A digital imaging system is described that provides techniques for reducing the amount of processing power required by a given digital camera device and for reducing the bandwidth required for transmitting image information to a target platform. The system defers an... | 05/13/2008 |
| 7373009 | Method and apparatus for efficient transmission and decoding of quantization matrices A method for encoding quantization matrices comprising the steps of (A) signaling whether values of a luma quantization matrix are determined by either (i) a first set of custom values or (ii) a set of standardized default values, (B) transmitting the first set of c... | 05/13/2008 |
| 7372998 | System and method for efficient non-overlapping partitioning of rectangular regions of interest in multi-channel detection A system and method in a multi-channel detection system for multi-rate filter bank applications for converting overlapping rectangular two-dimensional (2D) regions into a new set of non-overlapping rectangular regions for the efficient reconstruction of a signal whe... | 05/13/2008 |
| 7373004 | Apparatus for constant quality rate control in video compression and target bit allocator thereof An apparatus for constant quality rate control in moving picture compression. First, a total activity measure for the current picture to be encoded in a set of consecutive pictures is calculated. Based on the total activity measure of the current picture and an acti... | 05/13/2008 |
| 7369708 | Image data compression device and encoder An image data compression device including: a quantization section which quantizes image data; a FIFO buffer section which buffers quantized data for N frames (N is an integer greater than one) from the quantization section; an encoded data generation section which ... | 05/06/2008 |
