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7388621 |
Systems and methods for image processing providing noise reduction and edge enhancement
Image processing methods and systems for noise reduction and edge enhancement. A variation detector is provided to evaluate measures of edge existence in a plurality of predetermined directions...
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7369181 |
Method of removing noise from digital moving picture data
Provided is a method of removing noise from digital moving picture data reducing the number of frames used in a temporal filtering operation and able to detect motion between frames easily. The...
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7345711 |
Video signal improving circuit
A video signal improving circuit comprises an input section which receives a video signal; a delay circuit which delays the video signal to generate a plurality of delayed video signals which have...
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7324701 |
Image noise reduction
An image processing apparatus determines whether or not a target pixel TP which is the object of the smoothing process is an edge-forming pixel based on the edge level (gradient g). If the pixel is...
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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...
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7307657 |
Video signal processing method and device for processing luminance signal
In a video signal processing method of processing a luminance signal of a video signal generated by causing a CCD to receive light transmitted through color filters, a control signal yf 1 is...
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7271851 |
Adaptive color transient improvement
A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is...
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7236643 |
System and method for filtering and binarization of images in the presence of specular noise
In order to render information contained in images more detectable in the presence of noise, the present invention discloses a system and method to binarize the images in the presence of noise. The...
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7221404 |
Video signal processing method and device
To enable a satisfactory suppression of overemphasized component after converting the number of scanning lines of video signal, when the video signal is converted in the number of scanning lines...
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7212657 |
Method and system for enhancing portrait image that are processed in a batch mode
A batch processing method for enhancing an appearance of a face located in a digital image, where the image is one of a large number of images that are being processed through a batch process,...
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7187788 |
Method and system for enhancing portrait images that are processed in a batch mode
A batch processing method for enhancing an appearance of a face located in a digital image, where the image is one of a large number of images that are being processed through a batch process,...
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7184578 |
Method and system for enhancing portrait images that are processed in a batch mode
A batch processing method for enhancing an appearance of a face located in a digital image, where the image is one of a large number of images that are being processed through a batch process,...
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7161633 |
Apparatus and method for providing a usefulness metric based on coding information for video enhancement
An apparatus and method for enhancing the quality of a digital video signal uses coding information for use in connection with spatial domain sharpness enhancement algorithms used in multimedia...
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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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7084906 |
Reducing computation time in removing color aliasing artifacts from color digital images
A method of reducing color aliasing artifacts from a color digital image having color pixels including providing luminance and chrominance signals from the color digital image; downsampling 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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7068325 |
Video signal processor and video signal processing method
The present invention relates to a video signal processing device for avoiding a phenomenon that noise is upwardly or downwardly shifted due to noise reducing operation when a non-standard signal...
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7039222 |
Method and system for enhancing portrait images that are processed in a batch mode
A batch processing method for enhancing an appearance of a face located in a digital image, where the image is one of a large number of images that are being processed through a batch process,...
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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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6999634 |
Spatio-temporal joint filter for noise reduction
A spatio-temporal joint filter and a spatial joint filter for noise reduction are disclosed. The spatio-temporal joint filter includes a spatial joint filter including the first and second sub...
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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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6995803 |
Anti-aliasing characters for improved display on an interlaced television monitor
The described arrangements and procedures anti-alias a character for display on a monitor such as an interlaced television monitor. In one implementation, an expanded character is generated by...
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6970207 |
Anti-flicker filtering process and system
A process of filtering digital images to reduce image flicker. An anti-flicker filtering is performed after a step of calculating the image and before a step of displaying the image so that the...
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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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6898327 |
Anti-flicker system for multi-plane graphics
Flickering artifacts are removed from a displayed image by storing digital luminance values in a compressed form using disallowed luminance values clipped from a range of luminance values to encode...
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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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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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6775420 |
Methods and systems for improving display resolution using sub-pixel sampling and visual error compensation
Embodiments of the present invention provide systems and methods for converting a high-resolution image to a lower-resolution image with reduced visible errors. These systems and methods comprise a...
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6771833 |
Method and system for enhancing digital images
One aspect of the invention is a method of enhancing a digital image comprising at least one image channel. At least one spatial domain segment of a plurality of spatial domain segments of an 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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6757014 |
Video signal noise reduction apparatus, a method of reducing a noise in a video signal, and a recording medium storing a program of the method
A pixel data outputting circuit outputs center and peripheral pixel data from a video signal. A difference calculation circuit calculates differences of the peripheral pixel data from the center...
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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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6661469 |
False contour correcting apparatus and method
A false contour correcting apparatus is capable of removing a false contour in an image based on a digital image signal while avoiding such a side effect caused by false contour correction where...
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6650792 |
Image processor
An image processor containing an EPROM ( 38 ) stored with coefficient data for image enlargement and reduction, coefficient read controllers ( 40-44 ) for reading out coefficient data from the...
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6633683 |
Apparatus and method for adaptively reducing noise in a noisy input image signal
The basic configuration of Single local Adaptive Window Spatial Noise Reducer (SAW-SNR) is based on a preliminary de-noising low-pass filter followed by homogenous region segmentation to the...
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6633342 |
Apparatus and method for compensating image signal
An apparatus and method for eliminating noise of a received image and compensating its sharpness is provided. A common circuit is used in a structure for eliminating noise based on a double...
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6631162 |
Signal adaptive filtering method, signal adaptive filter and computer readable medium for storing program therefor
A signal adaptive filtering method for reducing blocking effect and ringing noise. a signal adaptive filter, and a computer readable medium. The signal adaptive filtering method capable of reducing...
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6611296 |
Video signal enhancement
In a video signal enhancement method, a video signal (Y) is histogram-based processed to obtain a histogram-processed video signal (Y′), and a sharpness of the histogram-processed video signal...
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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,...
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6600518 |
Adaptive clipping prevention for picture sharpness enhancement
A contrast control and clipping device is configured to determine a maximum range of enhancement that may be applied to each pixel for picture sharpness enhancement. This maximum range is used to...
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6600517 |
System and method for improving the sharpness of a video image
There is disclosed an apparatus for sharpening an edge in a video image. The apparatus comprises: 1) a first circuit for determining a first luminance value of a first pixel associated with the...
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6590617 |
Edge emphasis device, image forming apparatus, image signal processing method, and image forming method
This invention can suppress overshoot/undershoot, and can maintain the improvement effect of the leading edge of an edge portion. For this purpose, a second derivative signal generator ( 1 )...
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6496645 |
Video recorder having playback-signal processing means adaptable to different playback qualities of video recordings
A video recorder for playing video recordings recorded on magnetic tapes, these recordings being available with different playback qualities, and including a reproduction apparatus for scanning a...
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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...
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6459078 |
Image sensor utilizing a low FPN high gain capacitive transimpedance amplifier
An imaging element and an imaging array constructed from such elements. The preferred imaging element is constructed from a photodiode having a parasitic capacitance C pd ; and an amplifier for...
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6441866 |
Edge enhancement with background noise suppression in video image processing
In the field of imaging, various components may contribute to a loss in resolution at higher spatial frequencies, both horizontally and vertically. Higher spatial frequencies may occur at the edge...
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6424752 |
Image synthesis apparatus and image synthesis method
Disclosed are an image synthesis apparatus and an image synthesis method. According to the present invention, an image synthesis apparatus, for synthesizing a plurality of images to generate a...
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6424383 |
Apparatus for correcting vertical contours
An object is to provide a vertical contour correcting device for a video signal which reduces noise without deteriorating effect of the entire contour correction. A vertical contour correcting...
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6404460 |
Edge enhancement with background noise reduction in video image processing
The present invention is directed to a method and apparatus for image edge enhancement with background noise reduction. According to the method and apparatus, background noise is reduced through...
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6400403 |
Solid-state imaging device having improved resolution without generating a pseudo signal
A solid-state imaging device having a color filter of a checkered pattern arranged in an all-pixel reading solid-state image sensor includes an original signal aperture compensation device for...
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