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7471344 Display apparatus periodically modulating image-signal characteristics  
An image display apparatus has a control circuit that periodically varies a characteristic, such as an amplitude characteristic or timing characteristic, of the displayed image signal. Periodic...
7450181 Bit-depth extension with models of equivalent input visual noise  
A method for extending bit-depth of display systems. The method includes creating pseudo-random noise from human visual system noise. When applied to the image data, the noise causes spatiotemporal...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
6310660 Video signal dropout detector  
A method and apparatus for detecting video signal dropout. The method includes the step of generating a video signal, and then electronically isolating at least one component of the video signal....
6285411 Circuit for video moire reduction  
A method and device for reducing moire by preventing the production of the second harmonic of the video signal Nyquist frequency. A nonlinear function is applied to one of a) a digital video signal...
6259489 Video noise reducer  
In a video noise reducer, where pixel information is recursively filtered, with recursion being disabled at a disjuncture (caused by motion, planning, shot-change or otherwise), recursively...
6204890 Noise reducer using memory  
A noise reducer which applies a time-cyclic type of noise reproduction processing to only a predetermined image signal in an input image signal in the case of applying the time-cyclic of noise...
6195132 Noise reduction signal processing circuit and display apparatus  
A noise reduction signal processing apparatus for reducing noises accurately, such as for use in a display apparatus for displaying a video signal, has a median filter (40) which receives the video...
6169583 Method and circuit to determine a noise value that corresponds to the noise in a signal  
A method and circuit for determining a noise value that corresponds to the noise in a signal, the signal containing identical signal parts in the noise free signal. Noise values that correspond to...
6115502 Noise filtering  
In a motion-dependent noise filtering (MD, NRF), a received image signal and a delayed (3) image signal are combined in dependence upon both a local amount of motion and a global amount of motion...
6067125 Structure and method for film grain noise reduction  
A video signal is both spatially and temporally filtered. The output video signal is temporally noise reduced in portions of the image which exhibits little or no motion, and is spatially noise...
6040876 Low intensity contouring and color shift reduction using dither  
A method and system for reducing the effects of false contouring and reducing color shading artifacts. An image signal 102 is dithered by the addition of a small noise signal from a noise generator...
5926224 Imaging, system, video processing apparatus, encoding apparatus, encoding method, and method of removing random noise  
Since, in an imaging apparatus, a bit rate encoder for compressing and encoding a video data obtained by image pickup has a filter circuit for removing a random noise included in the video data and...
5886751 Method of eliminating interference signals from video signals  
Method of eliminating interference signals from video signals by means of motion-adaptive transversal filtering, in which the motion is detected in the two-dimensional plane for the purpose of S/N...
5777756 Video processing apparatus with multiple image signal integration and reduction for decreasing noise  
A video processing apparatus uses multiple image signal integration and reduction for decreasing noise. A television camera picks up an image of a still object and outputs image signals...
5745609 Fixed pattern compensation with adaptive window for MTF testing  
This invention is an apparatus and method that is able to accurately measure the system level modulation transfer function in the presence of fixed pattern noise from an imaging system electronics.
5745188 Apparatus for suppressing interference in television video signal  
An apparatus for suppressing interference in a television video signal comprises series connected a high-pass filter (1), an electronic switch (2) and a low-pass filter (4), and a video signal...
5701163 Video processing method and apparatus  
A video processing method and apparatus for processing video frames comprising animated images so as to blur movement of the animated images between successive frames, the method or apparatus...
5684720 Method and apparatus for adaptively producing noise-reduced digital image sequences  
In a method and apparatus for adaptive noise reduction of digital image sequences an input sequence of images obtained from a subject is subjected to pixel-by-pixel, temporal low-pass filtering,...
5680179 Methods and apparatus for filtering images using fuzzy logic  
A device for filtering video images, of the type which includes first and second circuit portions, each having first and second input terminals respectively adapted to receive digitalized luminance...
5659370 Fuzzy logic based filter architecture for video applications and corresponding filtering method  
A filter architecture for high-resolution video applications of the type comprising at least one filter block having a plurality of digital inputs which receive through an interface components of a...
5648820 Time-base conversion system  
A time-base conversion system including a first clock generator for generating a read clock based on a reference signal, a second clock generator for generating a write clock by dividing the read...
5543858 Method of and apparatus for reducing noise in a motion detector signal  
A method of reducing noise in the signal of a motion detector for recursive filtering of video signals, in which the signal is median-filtered. A part of the amplitude range of this signal located...
5491725 Tracking filter and quadrature-phase reference generator  
A tracking filter has a tunable filter responsive to an input signal for producing a filtered output signal, a Hilbert transformer for producing an in-phase reference signal and a quadrature-phase...
5481369 Crosstalk detector for optically read signals  
A crosstalk detector for detecting the crosstalk of signals optically read from a recording medium having a plurality of tracks. A changeover circuit selects one of first and second signals...
5453797 Method and apparatus for decoding broadcast digital HDTV in the presence of quasi-cyclostationary interference  
An HDTV receiver takes advantage of the detailed structure of the NTSC signal, namely the periodicity of the signal caused by the horizontal scan rate, in order to remove co-channel interference. A...
5448309 Noise canceler for video signal  
A noise canceler for a video signal includes: a delay circuit for outputting a succeeding line video signal, a present line video signal and a preceding line video signal: a minimum value detector...
5448303 Apparatus including amplitude limiter and associated method for generating a modified video signal  
An apparatus and method for generating a modified video signal consisting of a correction signal and a video input signal. The correction signal is derived from a digitized video input signal by at...
5446502 Method and apparatus for filtering signals having a filter in which signal amplitudes are allocated to a quantized, two-dimensional reference plane  
A method and apparatus serves for filtering signals, whereby signal amplitudes can be allocated to a quantized, two-dimensional reference plane. For intensifying a useful signal part, a filtered...
5446500 Noise reducing apparatus and methods for television receivers  
A high-performance television receiver synchronously detects the picture IF signal. A synchronous impulse noise in the IF signal generates either positive-going noise or negative-going noise in the...
5425114 Noise reduction apparatus  
A field recursive type noise reduction apparatus is disclosed in which the field difference is divided into a plurality of frequency components by means of the Hadamard transformation and the...
5404178 Noise eliminating circuit  
A noise eliminating circuit comprising a noise eliminating filter for moving image part to be used when an input image is of the moving image part, a noise eliminating filter for stationary image...
5396293 Filter circuit with bandwidth varied as a function of bit error rate and luminance level  
An arrangement for enhancing an image corresponding to a television signal including a digital component includes a variable bandwidth filter and a control unit for controlling the bandwidth of the...
5392211 Image processing apparatus  
A frame image signal which is output cyclically is converted to a digital signal and input to a first multiplier in a digital filter. The first multiplier multiplies a digital image signal Y i of...
Matches 1 - 50 out of 91 1 2 >