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| Number | Title | Issue Date |
| 7995149 | Subjectively weighted noise measurement Subjectively weighting noise measurements for multiple video formats based upon a defined standard for a standard definition video format uses a ratio between the active line time for the standard definition video format and the active line time for another video fo... | 08/09/2011 |
| 7428020 | Method and apparatus for noise reduction of video signals The present invention provides a method of noise reduction applied in digital video signal processing according to the following steps. A video signal is received initially; after the adaptive spatial filtering, a basic signal is generated. The basic signal is then ... | 09/23/2008 |
| 7319494 | System and method for reducing noise in images A method is provided for selecting a filter for interpolating a target pixel for reducing noise in an image. The method comprises the following steps. A plurality of pixels along a predetermined contour is compared with a plurality of predefined patterns. The patter... | 01/15/2008 |
| 7280161 | Noise reduction circuit and method A noise reduction circuit and method effectively reduce noise with a simple structure regardless of the partial content of an image while suppressing an increase in the capacity of the image memory used and process delays. The present invention forms noise-reduced d... | 10/09/2007 |
| 7274828 | Method and apparatus for detecting and processing noisy edges in image detail enhancement A method and system that detect image pixels of noisy and sharp image edges, and enhance such pixels differently than other pixels, so that noise around the detected pixels is essentially not boosted. A detection process is conducted on a pixel basis, wherein each p... | 09/25/2007 |
| 7272268 | Registration of separations Separations or images relating to film or other fields may be registered using a variety of features, such as, for example: (1) correcting one or more film distortions; (2) automatically determining a transformation to reduce a film distortion; (3) applying multiple... | 09/18/2007 |
| 7199844 | Quadratic nyquist slope filter A television demodulator circuit, for use in a television receiver, generates baseband video and audio outputs from a television signal, such as an intermediate frequency television signal. The I, Q demodulator circuit mixes the television signal with an in-phase (ā... | 04/03/2007 |
| 7181084 | Device and method for sub-band decomposition of image signals A device that receives and processes an image signal for sub-band decomposition of an image includes a first median filter that receives the image signal and processes signal values of pixel locations (x0, y0), (x0ā1, y0... | 02/20/2007 |
| 7158189 | Adaptive non-linear noise reduction techniques An impulse-reducing module (200) reduces random noise in video pixels by providing an impulse detector (244) and an impulse reducer, such as a median filter (250). The impulse detector (244) generates filter control signals in response to... | 01/02/2007 |
| 7151844 | Image sensor method and apparatus having hardware implemented edge detection processing An image sensor comprising an integrated circuit chip that includes both a pixel array and edge detection circuitry hardwired together on the chip. The pixel array provides an addressable, non-destructive readout of the pixel data, with the edge detection circuit pr... | 12/19/2006 |
| 7146054 | Method of digital image data compression and decompression A method for compressing and decompression digital image data. When compressing, the method begins by choosing a reference row. The relative data between the reference row and the current row is compared to search for the differential data set. The largest matching ... | 12/05/2006 |
| 7139035 | Video noise floor estimator with impulse noise detection A method of detecting both linear and non linear noise in video data. Linear noise is detected on a line-by-line basis, by blocks within each line. Non linear noise is detected during horizontal blanking periods. The method provides a noise floor value for linear no... | 11/21/2006 |
| 7130481 | Apparatus for attenuating image-noise adaptively and method thereof A method of adaptively attenuating image-noise according to a degree of motion of an image signal and an apparatus therefor are provided. An input image signal is filtered in a spatial area to attenuate noise of the input image signal. The input image signal is filt... | 10/31/2006 |
| 7102465 | Frequency discrete LC filter bank An inductive (āLā)-capacitive (āCā) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (āLā) bank, and capacitors configured in at least one capacitive (āCā) bank. The i... | 09/05/2006 |
| 7098963 | Method and apparatus for attenuating image noise A method of attenuating noise contained in an image signal according to the extent of the movement of the image signal based on the amount of noise, and an apparatus therefor are provided. This method includes measuring the amount of noise in an image signal by accu... | 08/29/2006 |
| 7095797 | Method of modulating a data signal with modulation switching between direct and differential modulation and apparatus for modulation A method and apparatus for modulating a data signal for transmission over a channel of a communication system, wherein a direct modulation scheme is applied to a data signal over a given first signal interval. Subsequently, a control measure is determined for switch... | 08/22/2006 |
| 7090746 | Process and device for removing water from a mechanical pulp, chemical pulp or paper sheet A process and apparatus for removing water from a mechanical pulp, chemical pulp or paper sheet, carried between top and bottom wires running through a dewatering machine having a first dewatering zone. The apparatus includes at least one suction box positioned down... | 08/15/2006 |
| 7088202 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 08/08/2006 |
| 7061546 | Arrangement for processing video signals An arrangement for processing video signals comprises at least one linear filter and at least one non-linear filter with inputs for an input signal and selection means for receiving output signals of the at least one linear and of the at least one non-linear filter ... | 06/13/2006 |
| 7034831 | System and method for generating a low discrepancy curve in a region A system and method for generating a curve in a region, e.g., a Low Discrepancy Curve. The method may generate an unbounded Low Discrepancy Point (LDP); apply one or more boundary conditions to the unbounded LDP to generate a bounded LDP located within the region; r... | 04/25/2006 |
| 7031551 | Noise reduction apparatus, noise reduction method, program and medium A noise reduction apparatus with simultaneous processing for allowing Simultaneous processing of image signals of a portion containing a noise processing object pixel to be inputted, wherein the image signals are existing at Spatially different locations or the imag... | 04/18/2006 |
| 6995774 | Display system and method of diminishing unwanted artifacts A method and apparatus for diminishing display transients and jitter. The method and system disclosed utilizes prior illumination and position histories in displaying and illuminating representations, and elements comprising the representations, on the display. Reco... | 02/07/2006 |
| 6987542 | Detection and correction of asymmetric transient signals The invention relates to a method and apparatus for detecting asymmetry in transient signals and to a method and apparatus for correcting such asymmetry. In the apparatus for detecting asymmetry there is provided a pre-shoot filter (1) for receiving an input ... | 01/17/2006 |
| 6958783 | Adaptive non-linear noise reduction techniques An impulse-reducing module (200) reduces random noise in video pixels by providing an impulse detector (244) and an impulse reducer, such as a median filter (250). The impulse detector (244) generates filter control signals in response to... | 10/25/2005 |
| 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 |
| 6933982 | Method and apparatus for fast robust estimation of image noise in a video processing system A method and apparatus for determining an image noise estimate value in a digital video processing system using only a single video image. In the method and apparatus, SAD values in the video image are calculated. For each SAD value, a determination is made as to wh... | 08/23/2005 |
| 6933983 | System and method for reducing noise in images A method is provided for selecting a filter for interpolating a target pixel for reducing noise in an image. The method comprises the following steps. A plurality of pixels along a predetermined contour is compared with a plurality of predefined patterns. The patter... | 08/23/2005 |
| 6919905 | Method and device for visual calibration of displays A method for calibrating a display using a plurality of visual stimuli. A plurality of visual stimuli having an associated digital count and an associated position are displayed. The digital count of each of the visual stimuli are adjusted wherein the plurality of v... | 07/19/2005 |
| 6909469 | Interlace motion artifact detection using vertical frequency detection and analysis An interlace motion artifact detector which identifies video image spatial frequencies characteristic of motion artifacts. The detected frequency is the maximum which can be represented by the vertical sampling rate of the video format (i.e., the Nyquist frequency).... | 06/21/2005 |
| 6710811 | Data processing device The invention relates to a data processing device for recovering digital data which is received in an analogue transmitted signal. According to the invention, the received signal is digitized and a threshold is determined in a threshold estimator. The interference i... | 03/23/2004 |
| 6700623 | Video signal processing using triplets of pixels A de-interlacing process takes a weighted sum of pixels in a filter aperture to generate a pixel in an output picture, the weighted sum including products of triplets of pixels. Using a training sequence of progressive material, it is possible to calculat... | 03/02/2004 |
| 6621525 | Double tapered roller of scroll thrust bearing In double tapered rollers of a thrust scroll bearing, a structure free from generation of edge load at both ends of a section straight line on conical or tapered surfaces, and appropriate in contact stress with the bearing race is presented. To be used as... | 09/16/2003 |
| 6611295 | MPEG block detector A method of detecting blocking artifacts in digital video pictures, includes a step of filtering (GF) a digital input signal (x) using a gradient filter for providing at least one filtered signal, and a step of calculating (CALC) a block level metric (BM)... | 08/26/2003 |
| 6563548 | Interlace noise filter An interlace noise filter which can obtain a high resolution still image from an interlace motion picture. An original image either in an even number field or in an odd number field is sampled by a sampling means (1) along only the horizontal direction of... | 05/13/2003 |
| 6496605 | Block deformation removing filter, image processing apparatus using the same, method of filtering image signal, and storage medium for storing software therefor A filter for removing block deformation that occurs in an image signal is disclosed. Detected are a plurality of differentials each between at least two pixel signal levels on block boundaries between pixel blocks and in the vicinity of the block boundari... | 12/17/2002 |
| 6493039 | Method and apparatus for white noise reduction in video images A method and system for reducing white noise in images. The method does not require knowledge of the image blur or noise statistics, and can remove noise without causing excessive image blur. The image is separated into frequency bands which are then thre... | 12/10/2002 |
| 6490008 | Method for removing a checkerboard-like noise artifact from a captured composite NTSC video frame A method of removing a noise artifact from a video frame captured from a composite NTSC video signal is disclosed. The captured video frame is stored in a first buffer and includes a first plurality of pixels forming a first interlaced video field and a s... | 12/03/2002 |
| 6441867 | Bit-depth extension of digital displays using noise A method for extending bit-depth of display systems. The method includes the steps of measuring the static display noise of a display device, using the display noise to create pseudo-random noise and subtracting the pseudorandom noise from a contone image... | 08/27/2002 |
| 6359658 | Subjective noise measurement on active video signal An apparatus and method is disclosed for measuring and filtering noise signals in an active video signal to create an enhanced video signal that produces a video image that is subjectively perceived to be superior to prior art video images. The apparatus ... | 03/19/2002 |
| 6335990 | System and method for spatial temporal-filtering for improving compressed digital video A filter that filters in the spatial and temporal domain in a single step with filtering coefficients that can be varied depending upon the complexity of the video and the motion between the adjacent frames comprises: a IIR filter, a threshold unit, and a... | 01/01/2002 |
