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| Number | Title | Issue Date |
| 8107755 | Information processing apparatus and method An information processing apparatus for encoding image data includes: a rearranging unit for rearranging coefficient data divided for each frequency band in order of executing synthesis processing for synthesizing the coefficient data of multiple sub-bands divided i... | 01/31/2012 |
| 8090209 | Image coding device, digital still camera, digital camcorder, imaging device, and image coding method Coding processing performed by an image coding device (100) includes: processing (S133) of performing coding by leaving surplus bit(s), when the digit number B of binary data of the difference value between (a) a value of a to-be-coded pixel and (b) a ... | 01/03/2012 |
| 8086057 | Dynamic quantizer structures for efficient compression A method and system are introduced that provide dynamic quantizer structures which are configurable during run time. A quantizer configuration and data are stored in a binary format. The dynamic quantizer data is represented as a bitstream, and the bitstream in turn... | 12/27/2011 |
| 7986849 | System and method for accurate parallel quantization with two multiplication operations A method, system and computer program product that involves receiving and initializing a digital image. Quantization is preformed on the digital image using at least two multiplication operations. Finally, a compressed version of the digital image is presented for v... | 07/26/2011 |
| 7848586 | System, medium, and method encoding and/or decoding image data A system, medium, and method encoding and/or decoding image data. The image data encoding may include a transformer transforming pixel values of an image in the time domain to pixel values in the frequency domain, a quantization coefficient determiner determining a ... | 12/07/2010 |
| 7844124 | Method of estimating a quantization parameter A method of estimating a quantization parameter is provided. The method is applied to a de-blocking filter. The de-blocking filter de-blocks a decoded block-based image according to the quantization parameter, and the block-based image is coded and decoded in units ... | 11/30/2010 |
| 7813575 | Enhancing compression while transcoding JPEG images Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its... | 10/12/2010 |
| 7805014 | Image-encoding controlling apparatus for using a table reflecting statistical frequency of quantization parameter selection and method thereof An image-encoding method and apparatus is provided for using a table statistically reflecting a selection frequency of a quantization parameter. The method includes the steps of preparing a table representing a relationship among a target bit quantity, a quantizatio... | 09/28/2010 |
| 7801383 | Embedded scalar quantizers with arbitrary dead-zone ratios Embedded scalar quantizers for compression are described, along with tools for corresponding decompression. For example, a codec uses an embedded dead zone plus uniform threshold quantizer with repeated division of steps by specific factors. Non-dead-zone steps at a... | 09/21/2010 |
| 7751638 | Adaptive quantizer A quantizer can be used to adjust the number of bits representing each sample value in a signal. Then, each received sample is allocated to one of a number of bins, with each bin corresponding to one of the possible quantizer output values. The quantizer can be used... | 07/06/2010 |
| 7734108 | Image processing circuit The present invention provides an image processing circuit capable of properly determining whether or not image data is a static image or a moving image and performing overdrive processing thereon. The image processing circuit includes a quantization unit (quantizat... | 06/08/2010 |
| 7720300 | System and method for effectively performing an adaptive quantization procedure A system and method for effectively performing an adaptive quantization procedure includes an energy calculator that initially determines energy values for subbands of input data. A quantizer receives initial quantization parameters that each correspond to a differe... | 05/18/2010 |
| 7711199 | Method for estimating quantization factor of compressed digital image An estimation system provides quality measure of a given image for image/video applications to determine if the image needs to be enhanced or not. The system systemically measures the image quality by estimating quantization parameter of the compressed digital image... | 05/04/2010 |
| 7684632 | Estimating image compression quantization parameter values Methods, machines, systems and machine-readable instructions for processing an image are described. In one aspect, the image is divided into a population of image blocks. Frequency domain vectors are generated from respective ones of the image blocks. Each of the fr... | 03/23/2010 |
| 7676107 | Method and system for video classification Described herein is a method and system for video classification. The method and system can use predetermined color ranges to classify a video block. On a relative basis, a greater number of bits can be allocated to perceptually important video data such as skin. Th... | 03/09/2010 |
| 7664334 | Image encoder, image encoding method, recording medium and computer data signal embodied in a carrier wave A processor performs layout analysis, and classifies pieces of bitmap data into a character area and a picture area. The processor divides each of the character area and the picture area into a plurality of tiles having a predetermined shape, thereby creating a tabl... | 02/16/2010 |
| 7664333 | Image retrieval device, image retrieval method and storage medium storing similar-image retrieval program An image retrieval device and an image retrieval method are provided which are capable of improving performance of image retrieval, of retrieving images at higher speed with simplified configurations and of retrieving images by simplified calculating processes. ... | 02/16/2010 |
| 7657110 | Image compression using a color visual model A system for coding images, and more particularly, to a system for compressing images to a reduced number of bits by employing a Discrete Cosine Transform (DCT) in combination with a visual model. ... | 02/02/2010 |
| 7653255 | Image region of interest encoding Methods and apparatus, including computer program products, for compression include decomposing an image into wavelet transform coefficients, applying a first quantizer to the wavelet transform coefficients, and applying a second quantizer to a set of wavelet transf... | 01/26/2010 |
| 7643695 | Image coding apparatus and its control method, and computer program and computer readable storage medium This invention allows Huffman encoding using a common Huffman table according to basic quantization values Qi,j even when image data expressed by n bits falling within the range from L to K is JPEG-coded, and can suppress the Huffman table size from incre... | 01/05/2010 |
| 7639886 | Determining scalar quantizers for a signal based on a target distortion Methods and apparatus implementing systems and techniques for determining quantizer values for a signal. In general, in one implementation, a technique includes: obtaining a target distortion and a transformed signal having sub-bands resulting from a source signal b... | 12/29/2009 |
| 7623721 | High-speed dithering architecture A filter for implementing Floyd Steinberg two-dimensional error diffusion algorithms allows high-speed processing of video and images. The filter is shown in direct form with proper bit precision with implementations that permit the filter to operate at high speed. ... | 11/24/2009 |
| 7616825 | Method for compression of image data and corresponding apparatus and computer-program product A method for compression includes applying a discrete cosine transform to said image data to obtain transform coefficients, quantizing the transform coefficients by applying a quantization level scaled through a gain value, adjusting the gain value as a function of ... | 11/10/2009 |
| 7609904 | Transform coding system and method A transform coding system and method are disclosed which utilize a modified quantization technique which advantageously foregoes the need for inverse quantization at the decoder. New techniques for optimizing an entropy code for the modified quantizer and for constr... | 10/27/2009 |
| 7583850 | Image-processing apparatus and method A bit stream is decoded to generate first quantized DCT-coefficients. The first quantized DCT-coefficients are inversely quantized using a first quantization table, thereby generating DCT-coefficients. The resulting DCT-coefficients are quantized using a second quan... | 09/01/2009 |
| 7574066 | Method for image compression, related system and computer product therefor A method for image compression of a set of image data includes performing a quantization operation on the image data. The quantization operation may include controlling a compression factor by applying a scaled quantization level obtained by multiplying a first quan... | 08/11/2009 |
| 7558432 | Adaptive quantization of depth signal in 3D visual coding A method of representing an image or sequence of images using a depth map comprises transforming an n-bit depth map representation into an m-bit depth map representation, where m | 07/07/2009 |
| 7551790 | Image capture apparatus capable of correcting captured image An image capture apparatus includes a quantization precision selection device and an image data correction device. The quantization precision selection device selects a first quantization precision when an operation for reading out image data from an image sensor is... | 06/23/2009 |
| 7542617 | Methods and apparatus for minimizing requantization error Techniques and mechanisms for performing error minimizing requantization are provided. Quantized coefficients associated with a bitstream are received. It is determined whether the quantized coefficients are associated with an inter macroblock or an intra macroblock... | 06/02/2009 |
| 7536059 | Luminance preserving color quantization in RGB color space A color quantization method in RGB color space which preserves high precision of luminance information in an original high precision RGB image signal which is quantized to a lower precision (lower bit depth) RGB signal. The method can be used to convert the original... | 05/19/2009 |
| 7532765 | Run length encoded digital image Methods, apparatus and computer readable medium are described that compress and/or decompress digital images in a lossless or a lossy manner. In some embodiments, a display controller may quantize pels of a digital image and may identify runs of successive quantized... | 05/12/2009 |
| 7463783 | Constant magnification imaging method and system A system and method for achieving constant magnification of a scanned three-dimensional item without the use of special optics or other specialized hardware. The system includes the dynamic computation of a camera parameter-dependent factor and applying that factor ... | 12/09/2008 |
| 7447373 | Method for efficient coding of shape descriptor parameters A method of representing an object appearing in a still or video image, by processing signals corresponding to the image, comprises deriving a plurality of sets of co-ordinate values representing the shape of the object and quantising the co-ordinate values to deriv... | 11/04/2008 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
