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7119854 |
Method for deriving an objective sharpness metric
A method is provided for deriving an objective sharpness metric for objectively determining the level of image sharpness of many and unspecific images having different degrees of sharpness. The...
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7113211 |
Video signal processing circuit, viewfinder apparatus, television camera, and image monitor apparatus
A video signal processing circuit, which performs contour adjustment by means of digital signal processing, is applicable to a viewfinder apparatus for a television camera and an image monitor...
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7110044 |
Image detail enhancement system
A detail enhancement system uses a detail filter bank including multiple detail filters covering different frequency ranges. An input video signal representing a digital image is processed in the...
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7106386 |
Device and method for improving picture quality
A picture quality improvement device has two-dimensional low-pass filter that takes as input a luminance signal YIN that is obtained from a video signal and that extracts low-pass components for a...
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7098964 |
Apparatus and method for slope-enhancement of signal transitions in television pictures
A time-discrete picture signal is formed from an analog picture signal, such as a luminance signal or a chrominance signal. Corresponding to the time-discrete picture signal, a time-discrete filter...
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7095438 |
Image signal processing device for minimizing false signals at color boundaries
An image signal processing device of the present invention includes an RGB-YC conversion for converting color component signals output from a CCD (Charge Coupled Device) image sensor to luminance...
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7091996 |
Method and apparatus for automatic clock synchronization of an analog signal to a digital display
A method and apparatus for estimating a true horizontal resolution by determining a temporal spacing of a cumulated sum pattern of a detected rising feature edge. If the temporal spacing is...
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7092582 |
Systems and methods for multi-dimensional enhancement using fictional border data
A multi-dimensional image data enhancement system is configured to reduce the effect of blanking areas on the large kernel processing of pixel data. Thus, when pixels comprising blanking data are...
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RE39237 |
Interpolation method for binary image
An improved interpolation method in which a threshold value used for determining a pixel value of a pixel generated by interpolation according to a context which is a state value of adjacent...
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7088351 |
Real time image enhancement with adaptive noise reduction and edge detection
Systems and methods for controlling a display device include receiving a source video signal from a video source; storing video pixels in one or more line buffers; enhancing the video signal on the...
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7075588 |
Edge correction method and apparatus
An edge correction apparatus and a method of performing an effective edge correction of an image signal in horizontal, vertical and diagonal directions include generating a two-dimensional (2D)...
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7042519 |
Control apparatus and method for preventing repeated signal processing in signal processing system
A control apparatus and method for processing a signal, and more particularly, a control apparatus and method for preventing a signal from being processed repeatedly by transmitting and receiving...
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7042518 |
Digitally controlled variable frequency HF emphasis circuit for use in video displays
A sharpness filter processes a video signal that is to be displayed in a windowed environment. The windowed environment may contain windows that for displaying television images derived from video...
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7023487 |
Deinterlacing of video sources via image feature edge detection
An interlaced to progressive scan video converter which identifies object edges and directions, and calculates new pixel values based on the edge information. Source image data from a single video...
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7009662 |
Electronic circuit and method for enhancing an image
An electronic circuit 100 and method for enhancing an image, in particular, for use in TV-applications, includes a N-dimensional image enhancement filter 130 for receiving an image signal and...
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7002636 |
Video signal contour corrector
A gray scale correction unit intended to provide a gray scale correction unit for preventing aliasing-like noise generation and gray-scale degradation of a gradation portion adaptively controls a...
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6999630 |
Method of processing, and corresponding filtering device
The invention relates to a method of processing data, which may be pixels (P[i,j]) representing a sequence of pictures, previously encoded and decoded. The method comprises at least in series a...
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6980258 |
Method and circuit for emphasizing contour
More natural contour emphasizing processing is performed by detecting the direction of a contour with respect to a point where horizontal and vertical contours cross and a diagonal contour point....
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6972805 |
Display of a video signal by means of a line scan
An apparatus displays a video signal (VID) by means of a scan (SCAN). The apparatus may be, for example, a television set. The apparatus comprises a device (SCAVEM) for modulating the scanning rate...
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6965416 |
Image processing circuit and method for processing image
The present invention relates to an image processing circuit and an image processing method, and is applied to, for example, a video camera, an electronic still camera and the like, for compressing...
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6956976 |
Reduction of differential resolution of separations
Certain disclosed implementations use digital image processing to reduce the differential resolution among separations or images in film frames, such as, for example, red flare. A location in the...
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6943848 |
Unit for and method of video signal enhancement and image display apparatus provided with such a video signal enhancement unit
A video signal enhancement unit ( 100 ) and an image display apparatus containing the unit have a processing unit ( 102 ) for contrast modification of the video signal. The processing unit ( 102 )...
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6930752 |
Image processing method and apparatus
An image processing method includes: discriminating between a still picture area and a motion picture area in an input image; enhancing edges with a quantity of edge enhancement larger in the...
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6912015 |
Video display apparatus with vertical scan velocity modulation and video display method thereof
A parallel scanning circuit outputs a parallel scanning signal for making forward and backward scanning lines parallel. A vertical correlation detection circuit detects a portion where the change...
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6903782 |
System and method for performing segmentation-based enhancements of a video image
There is disclosed an apparatus for performing segmentation-based enhancements of a video image. The apparatus comprises: 1) an input buffer for storing video frames of an incoming video signal; 2)...
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6897897 |
Horizontal contour signal generation circuit in single chip color camera
A horizontal contour signal generation circuit in a single chip color camera comprises a first horizontal contour signal generation circuit provided in a stage succeeding a first horizontal...
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6891549 |
System and method for edge enhancement of images
A method for generating an enhanced image includes the steps of: (a) receiving a matrix of pixels representative of an image; (b) generating a gradient image representative of a difference between...
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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...
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6876398 |
Control of scanning velocity modulation
A scanning velocity modulation deflection signal generator comprises a variable conduction device coupled to said scanning velocity modulation deflection signal generator. In a first condition the...
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6873373 |
Image emphasizing apparatus and image emphasizing program
An image emphasizing apparatus includes: an outline component extraction section; a threshold value calculation section for calculating first and second threshold values; and an outline correction...
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6873372 |
Clipping circuit and image processing device employing such a clipping circuit
In an image processing device, an edge detecting circuit 1 produces edge signals that represent edge components present in image signals, and an adder circuit 2 superimposes the edge signals on...
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6870575 |
Screen-noise eliminating apparatus and cathode-ray tube display apparatus
A screen-noise eliminating apparatus including beam-spot-length control means for increasing or decreasing the vertical length of a beam spot on a display screen generated by an electron of a...
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6867817 |
Natural luminance transient enhancement
A method and apparatus for enhancing an edge transient contained in a video signal include identifying the edge transient and the edge center of the edge transient in the video signal; selecting a...
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6864923 |
Edge correction circuit
In an edge correcting circuit of an image to be represented by a digitized image signal, a high-frequency signal extracting circuit ( 5 ) extracts a high-frequency signal of the image by...
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6850275 |
Edge correction apparatus for digital video camera
An edge correction apparatus for a digital video camera includes horizontal and vertical edge signal generators, horizontal and vertical edge signal gain controllers, an adder, a slice processor,...
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6816193 |
Image processing apparatus
An image processing apparatus includes: an image pickup section for converting an object light into image signals of Bayer RGB array; a color information detecting section for obtaining color...
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6795083 |
Color enhancement of analog video for digital video systems
A method and system enhances the color of an image by manipulating the chrominance and/or luminance signals of the image. Specifically, a color enhancement system sharpens color changes for better...
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6795580 |
Picture quality measurement using blockiness
A picture quality measurement technique using blockiness provides realtime analysis without the use of a reference signal. A field/frame of an image represented by a processed video signal is...
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6791624 |
Television receiver image processing using display of different image quality adjusted images
A television receiver according to the present application obtains a plurality of moving image data indicating the same moving image by using received moving image data, performs different image...
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6771320 |
Contrast enhancement apparatus of video signal
A contrast enhancement apparatus of a video signal comprises a coefficient generation unit for generating a low frequency mapping coefficient which increases or attenuates the low frequency...
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6721016 |
Jitter detection device and image quality correction device for adaptively changing correction when reproducing video signal
A jitter detection device for detecting jitter of a video signal (Sv) measures a vertical period (Stf(v)) of one field (v) of the video signal (Sv) to determine, based on a vertical period signal...
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6717622 |
System and method for scalable resolution enhancement of a video image
A system and method for enhancing resolution in a video image includes acquiring a relatively low resolution video signal and applying a peaking function and analyzing the peaked signal to identify...
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6697540 |
Method for digital image interpolation and sharpness enhancement
The invention disclosed a method for digital image interpolation and sharpness enhancement, said method includes the following steps: 1) Inputting an image signal Xij to a first interpolation low...
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6693669 |
Method for reducing image blurring
A method for reducing blurring associated with objects forming part of a grey scale image. The method includes receiving ( 11 ) a set of image pixels and then calculating ( 12 ) a gradient value...
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6690429 |
Device and method for processing color signal
A device and method for processing a color signal which can improve the sharpness of a color signal is disclosed. In the present invention, an edge of an image is detected and the detected edge is...
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6687300 |
Motion detection circuit and a noise suppressing circuit including the same
In a motion detection circuit, a difference signal between the video and one-frame delayed video signals is generated Edge signals are generated from the video and delayed video signals. Motion in...
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6677994 |
Image processing apparatus method of the same and camera apparatus
An image processing apparatus having a compensation value calculating unit, wherein an XOR element compares the signs of a difference A with a difference r and output the difference A as a...
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6674486 |
Signal processor and signal processing method
A video signal processor includes a sharpening circuit, a non-correlation detecting circuit, and, optionally, a noise level detecting circuit. The sharpening circuit is capable of receiving an...
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6670999 |
Contour emphasizing circuit and method thereof
A contour emphasizing circuit and a contour emphasizing method, in which an image having sharpness and a clear image can be obtained, are provided. The contour emphasizing circuit provides a...
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6657603 |
Projector with circulating pixels driven by line-refresh-coordinated digital images
High resolution projected digital images are produced by projecting in quick succession slightly different and slightly displaced low resolution images which are digitally derived from an image...
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