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5543859 |
Horizontal contour emphasizing signal processor
An improved horizontal contour emphasizing signal processor is provided with a detector to detect a period during which luminance signal changes are produced, a generator to generate a...
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5537154 |
Edge compensation method and apparatus of image signal
The present invention relates to a digital image signal processing method and apparatus, and more particularly, to an edge compensation method and apparatus of an image signal capable of improving...
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5532828 |
Image forming apparatus with edge smoothing
An image forming apparatus includes a dot forming unit responsive to a drive signal for forming a dot on a pixel when the drive signal is indicative of forming the dot to reproduce a halftone...
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5532756 |
Color video signal detector and color video signal detecting method
A color video signal detector that detects the color level and the color phase of a color video signal includes a differentiating circuit that differentiates a color video signal to detect edges in...
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5521649 |
Transmitting device of a predetermined transmission bandwidth, with an anti-distortion device connected downstream
An anti-distortion device, connected downstream of a transmitting device (2) with a determined transmission bandwidth for transmitting a input signal (Se) with signal jumps (3), wherein the delay...
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5491521 |
Scan velocity modulation system with auxiliary vertical deflection towards bright side of video signal transitions
A video signal is applied to a kinescope having scan velocity modulation for improving picture sharpness in the vertical direction. Pictures from video signals of a type having non-interpolated and...
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5491520 |
Contour correcting circuit for sharpening rising and falling edges of video signals
A contour correcting circuit sharpens only the rising and falling edges of a video signal, without increasing the shoot levels of the video signal, to improve image sharpness on picture. Second,...
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5479216 |
System for transmitting color television signals that contain a luminance signal and at least one color signal related thereto
Inserted in the transmission path (10) for transmitting a color signal of a color television signal is a signal switcher (12) with at least three switch positions (12a, 12b, 12c), the end positions...
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5469225 |
Apparatus and method for enhancing transient edge of video signal
An apparatus and a method for enhancing a transient edge of a video signal. The enhancement apparatus comprises a transient edge detecting circuit for first degree-differentiating the video signal...
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5463426 |
Image acquisition and enhancement method and system
An image enhancement method, wherein video analog signals are provided, a reference analog image is selected and the signals of the image are digitized, the digitized signals are converted to video...
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5457546 |
Video signal transient edge enhancing device and method for image processing system
A video signal transient edge enhancing device and method which can clearly display an image by properly enhancing transient edges of video signals having different frequency bands according to the...
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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...
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5432563 |
Image contour enhancing apparatus which limits enhancement where signal components for contour enhancement in both horizontal and vertical directions are generated in overlapping relationship
An image contour enhancing apparatus capable of minimizing excessive enhancement of the image contour in an image area where both a horizontal contour enhancing signal and a vertical contour...
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5430499 |
Apparatus for correcting vertical aperture of an image
An apparatus for correcting a vertical aperture of an image generates a vertical aperture correction signal having no line pair component contained therein from a signal read out at every frame...
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5424780 |
Apparatus and method for spacial scan modulation of a video display
An apparatus and method is shown for modifying the presentation of pixels displayed or printed on a raster or matrix image or graphic display or printer, thereby increasing the apparent image...
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5418574 |
Video signal correction apparatus which detects leading and trailing edges to define boundaries between colors and corrects for bleeding
A video signal correction apparatus has a memory for storing a luminance value and color difference values for each pixel in an image, a horizontal color difference correction arrangement and a...
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5404180 |
Waveform shaping method, waveform shaping apparatus and apparatus for correcting contour of carrier chrominance signal
A waveform shaping apparatus in which no unrequired waveform shaping operation is performed even if its sensitivity is enhanced is provided. A signal (A) to be shaped in waveform is delayed by...
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5400161 |
Optical system including focus-defocus focal plane array compensation technique using liquid crystal phased array
An optical system is described including an array of photodetectors, each photodetector having a surface, and a focusing system employing a liquid crystal phased array for focusing a beam of...
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5388081 |
Two-dimensional noise shaping filter circuit
A two-dimensional noise shaping filter circuit including a first adder for adding a feedback signal to the input signal A quantizer is provided for quantizing an output from the first adder. A...
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5388159 |
Equalizing circuit for reproduced signals
An equalizing circuit is disclosed, in which a received signal is divided into high frequency components in different bands and a low frequency component; after having subjecting the high frequency...
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5379074 |
Multilevel nonlinear filter for edge detection and noise suppression
A multilevel nonlinear filter in a HD-MAC decoder, for performing intra-frame filtering corresponding to a post processing, and for performing a progressive scan conversion using edge information...
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5374963 |
Picture resolution enhancement with dithering and dedithering
A dithering technique in accordance with an inventive arrangement saves two bits per sample in a wideband video signal. In accordance with this arrangement, a dither signal is added to an n-bit...
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5374964 |
Circuit and method for controlling abnormally slow transitions in color television signals
A circuit and method for shortening the transition time of sharp color transitions in color television signals. The invention includes a pattern recognition circuit and method which directly and...
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5369446 |
Video signal processor employing edge replacement, preshoots and overshoots for transient enhancement
A video input signal is applied to a delay circuit having a plurality of taps which are coupled to maximum and minimum value selection circuits. In the absence of a video signal transient, the...
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5363201 |
Picture control system for video cassette tape recorder
A picture control system for a video cassette tape recorder, capable of compensating edge portions of a reproduction luminance signal by obtaining a hard compensating signal by filtering a...
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5349389 |
Video attenuator with output combined with signal from non-linear shunt branch to provide gamma correction and high frequency detail enhancement
A video input signal is applied to a bridged-T attenuator which includes a non-linear element in the shunt branch thereof that provides increasing attenuation as the input signal increases to...
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5329316 |
Contour compensator for video image having overlapping information
A contour compensator for adding preshoot or overshoot to a transitional portion of a video signal to improve the resolution of a picture. The compensator comprises a window signal generator for...
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5329599 |
Enhanced fidelity reproduction of images by hierarchical template matching
The contour fidelity of reproduction of images is enhanced by matching groups of pixels with templates based on a hierarchical set of patterns. This is accomplished by isolating a symmetrical...
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5325203 |
Adaptively controlled noise reduction device for producing a continuous output
An adaptively controlled noise reduction device in which an input video signal is supplied to first, second, and third adders and in which an output of the first adder is supplied to the second...
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5321511 |
Horizontal edge compensation circuit for a digital image processor
A horizontal edge compensation circuit includes a delay circuit for delaying an input luminance signal for a certain time, a waveform converter for differentiating the input luminance signal to...
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5304854 |
Signal transient improvement circuit
A transition enhancing circuit includes a tapped delay line which provides successively delayed replicas of the signal to be processed. A multiplexer, responsive to a signal transition,...
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5303047 |
Contour compensation circuit for a signal processing apparatus of an image recording and reproduction apparatus
A contour compensation circuit comprises a first delay circuit to generate a first signal that is the image signal delayed by a first required time, a second delay circuit to generate a second...
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5294984 |
Video signal processing system for producing intermediate pixel data from neighboring pixel data to improve image quality
A video signal processing system improves the image quality displayed in a CRT or printed by a video printer. In order to produce natural and fine video signals, pixel data corresponding to an...
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5293541 |
Picture quality improving apparatus for compensating contour of images
The present invention relates to an improved image improvement apparatus which can be applied to video apparatus and to various other types of image processing apparatus. This invention has as an...
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5293225 |
Digital signal processing system for color camera apparatus including separate delays for color signal and brightness signal processing
A color camera apparatus comprises an image pickup element having a stripe/mosaic type color filter and photo-electrically converting an arriving optical image so as to obtain at least a signal...
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5291288 |
Aperture correcting circuit
A video camera is comprised of an aperture correcting signal generating circuit for generating an aperture correcting signal from a video signal of a picked-up image, and a nonlinear processing...
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5291277 |
Digital image signal processing circuits
A digital image signal processing circuit for use in a VTR with camera has a signal input terminal to which an image pickup output signal or a video signal is supplied, an analog to digital...
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5289283 |
Inter-frame video filter having selective linear and non-linear transfer characteristics as function of inter-frame differences
Temporarily filtered video samples are formed as the sum of a previous frame output sample and a non-linear function of the difference between current and previous samples. The function is...
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5247361 |
Outline enchancing device
An outline enhancing device for enhancing an outline of an image formed by a video signal having a rising and falling slope portions and a flat portion includes an enhancing signal producing...
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5243433 |
Digital image interpolation system for zoom and pan effects
A video image alteration apparatus is described that separates the vertical and horizontal aspects of image alteration. Pixels relating to an input image derived from a frame of film are sampled at...
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5239378 |
Gradation corrector with improved smoothing, signal-to-noise ratio and fast response time
In a gradation corrector used in a television receiver, a clipping circuit is connected to an output of a histogram memory and a clipping level of the clipping circuit is changed in accordance with...
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5237414 |
Video enhancer with separate processing of high and low level transitions
A full dynamic-range video enhancer employs a detail process for lower level transitions in a video signal stream and a spectrum expander for higher level transitions. The characteristics of the...
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5231317 |
Circuit arrangement for steepening signal slopes
In a circuit arrangement for steepening signal slopes of a digital signal in the form of a sequence of amplitude-discrete sampling values of an analog signal, the digital signal to be steepened is...
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5231677 |
Image processing method and apparatus
There are image processing method and apparatus for use in digital copying apparatuses, facsimile apparatuses, etc. which handle an image signal. This apparatus comprises an edge detector to detect...
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5229860 |
Afterimage elimination circuit for liquid crystal
An afterimage elimination circuit for a liquid crystal display apparatus provides a substantial improvement of the transient response characteristics of the liquid crystal display elements, by...
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5220428 |
Digital video effects apparatus for image transposition
In a digital video effects system a data store (13) is provided for storing the address within a frame store of image information from the corresponding image frame that is to appear within another...
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5220624 |
Apparatus for reading images and method for enhancing the outlines of shapes
The present invention relates to a method for enhancing the outline of shapes that occur in an original image which has been obtained by the use of an electro-optical scanner or similar device for...
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5218649 |
Image enhancement system
A system for enhancing the quality of an image that suffers from staircase effects, contouring effects, and granular noise, without affecting the existing method of creating the image is disclosed....
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5204747 |
Aperture compensation circuit
An aperture compensation circuit which includes a first differentiating circuit for differentiating an input signal to its input terminal to provide a primary differentiated signal, a squaring...
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5200824 |
Luminance signal noise suppressor
A luminance signal noise suppressor for suppressing noise of a video luminance signal automatically in a television receiver or the like in response to possible large noise which is detected as a...
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