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| Number | Title | Issue Date |
| 7024052 | Motion image decoding apparatus and method reducing error accumulation and hence image degradation An Hadamard transform coding circuit changes a rounding method for each Hadamard transform block to prevent a rounding operation from providing an error biased in one direction, as seen in a picture in its entirety, for data compression and rounding. More specifical... | 04/04/2006 |
| 6970579 | Orientation invariant feature detection system and method for unstructured low-quality video A system and method for detecting features in video from business meetings and video teleconferencing systems can use color, motion, morphological (shape) filtering and a set of heuristic rules to determine possible features in the scene. One embodiment includes obt... | 11/29/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6925122 | Method for video-based nose location tracking and hands-free computer input devices based thereon A method for tracking the location of the tip of the nose with a video camera, and a hands-free computer input device based thereon have been described. According to this invention, a convex shape such as the shape of the tip of the nose, is a robust object suitable... | 08/02/2005 |
| 6888564 | Method and system for estimating sharpness metrics based on local edge kurtosis The present invention relates to a method and system for evaluating the quality of video data without gaining access to the source data. The system is configured to estimate sharpness metrics by detecting edge pixels and enclosing them with 8×8 pixel blocks. For ea... | 05/03/2005 |
| 6870883 | Parallel encoding and decoding processor system and method Encoding and decoding systems for MPEG encoding and decoding at a high speed using a parallel processing system, wherein macroblocks to be processed are designated for first to third processors which are made to carry out all processings of encoding, variable length... | 03/22/2005 |
| 5539663 | Process, apparatus and system for encoding and decoding video signals using temporal filtering For decoding, a first portion of an encoded bitstream is decoded to generate a first decoded video frame. A second portion of the encoded bitstream is decoded to generate a second decoded video frame. A temporal filter is applied to the first decoded vide... | 07/23/1996 |
| 5394190 | Video signal encoding apparatus A field to be encoded is divided into blocks. Then, first, second, and third motion vectors relative to data of a block of the field to be encoded are calculated from data of an m-th preceding field (m: even), data of an n-th preceding field (n: odd), and... | 02/28/1995 |
| 4774574 | Adaptive block transform image coding method and apparatus In a method and apparatus for transmitting a digital image over a limited bandwidth communication channel, an image is block transformed to produce blocks of transform coefficients; the transform coefficients are quantized in accordance with a model of th... | 09/27/1988 |
| 4504860 | Method and process for transmitting an image A method and an apparatus for transmitting an image in which the image is sampled at a first plurality of points. The samples are then subjected to a two-dimensional unitary transform to produce a second plurality of transform coefficients, the second plu... | 03/12/1985 |
