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6850272 |
Image processing method and system
An image processing method for image-processing digital image data acquired by a digital camera to enable reproduction of high-quality images includes the steps of computing first characteristic...
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6839088 |
System and method for estimating physical properties of objects and illuminants in a scene using modulated light emission
Color balancing algorithms for digital image processing require an accurate estimate of the physical properties of the ambient scene illuminant, particularly its spectral power distribution. An...
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6826302 |
Luminance correction of colorless low saturation regions using correction constants calculated from color saturation values
In image signal processing, the color saturation values of image signals are accumulated within each of a plurality of color saturation calculation regions by a color saturation accumulator circuit...
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6822695 |
Surrounding light judging method and video compensation control apparatus using the same
A surrounding light judging method and a video compensation control apparatus which are capable of securing an optimum quality of picture by detecting a color signal near a video displaying...
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6822677 |
Method and device for adjusting white balance based on primary color signals modulated with fourth color signal obtained by fourth sensor
An image pickup device includes a first, second, and third sensors respectively sensitive to light in the blue, green, and red wavelength ranges, and a fourth sensor sensitive to light in a certain...
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6803949 |
Image sensing apparatus and method
In an image sensing apparatus which senses a plurality of color images for obtaining a single color image or black-and-white image of high resolution by combining the sensed images, a color...
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6801296 |
Image processing method, image processing apparatus and image recording apparatus
An image processing method to conduct an image processing on image signals indicating an image obtained through photographing by a photographing apparatus for generating image signals for output....
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6798449 |
Automatic white-balance correction for digital camera
There is disclosed an automatic white-balance correction method for digital camera, which divides a captured picture into multiple sampled regions for performing a white-balance correction. The...
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6795115 |
White-balance adjusting apparatus
A white-balance adjusting apparatus includes a CPU. The CPU integrates R, G, B and Y signals of a subject image on the basis of each of divisional areas of N in number, to determine integration...
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6791606 |
Auto white balancing apparatus and method
An auto white balancing apparatus includes a block split circuit for splitting an image into a plurality of blocks; a representative color calculating circuit which for each split block, derives a...
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6788339 |
Image pickup apparatus
An image pickup apparatus is capable of accurately performing white balance control by accurately detecting color temperature without depending on a luminance signal level. In the image pickup...
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6788812 |
Techniques for selective enhancement of a digital image
By automatically compensating for unwanted lighting effects caused by varying ambient light sources, digital still images and video are made to appear more naturally realistic. A set of correction...
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6778216 |
Method and apparatus for digital camera real-time image correction in preview mode
A method for previewing an image in a camera prior to output. The method includes steps of gathering image data, storing the image data, calculating display parameters using the stored image data,...
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6770861 |
Image-sensing device
In an image-sensing device, a temperature-corrected image signal obtained from a sensor 1 is converted into a digital signal by an A/D converter circuit 2 . The image signal thus converted into...
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6768510 |
Color correction for RGB
A camera, comprising at least one photodetector, and a light directing device. The light directing device separates light of a wavelength from about 360 nm to about 420 nm to form an NUV component...
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6768511 |
Exposure control circuit for solid-state imaging apparatus
A solid-state imaging apparatus having a CCD image capturing circuit includes an exposure time control circuit which analyzes the image signal generated by the image capturing circuit and generates...
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6753908 |
Linear matrix circuit
The invention provides a linear matrix circuit which can control linear conversion of color reproduction with a comparatively small number of parameters, which conform with a feeling of a human...
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6747704 |
Video camera apparatus capable of simply extracting brightness information used in auto-iris control
In a video camera apparatus, a proper iris control operation can be carried out based upon pseudo-luminance information, and the iris control operation and also the focus control operation can be...
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6747694 |
Television signal processor for generating video signal of wide dynamic range, television camera using the same, and method for television signal processing
A television signal processor generates a wide dynamic range video signal on the basis of a first video signal matched to the brightness of a low-brightness region of an object image, and a second...
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6734899 |
Method of establishing color correction functions
The gray balance of an input signal produced when a gray chart is read by a digital camera is adjusted by a color processor. Thereafter, a color chart is read by the digital camera, and color...
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6734895 |
Digital camera and recording medium
A digital camera has a mounting part to mount a shooting lens or other optical equipment, and includes a mode switch that changes between a mode that shoots using the shooting lens and a mode that...
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6727942 |
Auto white balance apparatus
A brightness threshold value calculation unit figures out a brightness threshold value on the basis of a brightness average value of all blocks and the brightness of a maximum brightness block...
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6727943 |
Electronic camera with white balance adjustment recording medium storing image processing program for white balance adjustment
A photographic image-capturing element that receives a subject light flux and outputs a photographic image signal and a white balance adjustment image-capturing element that receives the subject...
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6724423 |
Video camera and video camera system
A video camera system capable of matching colors between configured video cameras by effectively reducing color differences therebetween. A red, a green and a blue signal from imaging devices are...
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6721000 |
Adaptive pixel-level color enhancement for a digital camera
An adaptive color enhancer applies different scale factors to different pixels in a digital image. More color enhancement occurs for bright pixels and for dim pixels than for average-intensity...
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6714239 |
Active pixel sensor with programmable color balance
A semiconductor based image sensor comprising a plurality of pixels formed upon a major surface of a semiconductor substrate, a majority of the pixels having a photodetector with a plurality of...
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6710821 |
White balance adjusting apparatus
A white balance adjusting apparatus includes a test signal source 13 for generating a black signal for testing and a white signal for testing, a first impedance means 1 for converting currents...
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6707491 |
Method of correcting white balance in video camera
A method of correcting white balance in a video camera is provided, which controls the red gain and blue gain of a captured image signal to allow the average of color difference signals of a...
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6704046 |
Digital pixel image sensor with independent color channel reference signals
A pixel image sensor having an array of pixel elements arranged in a color mosaic pattern, each pixel element being responsive to light of a particular color. Each pixel element is supplied with a...
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6697110 |
Color sample interpolation
In a method of interpolating a color sample in a signal (RGBin) having alternately colored samples, the missing color sample is interpolated in dependence upon neighboring color samples (G 1 , G 2...
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6693673 |
Digital camera for adjusting charge accumulation time in response to object distance
In a digital camera, when flash shooting is performed, a maximum distance at which a subject can be illuminated to appropriate brightness is calculated based on the guide number of a flash and the...
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6674465 |
Image processing apparatus which does not generate a false signal even if unevenness of spectral sensitivities of the color filter occurs
An apparatus for processing image data including three complementary color components representing the three primary colors includes a distribution circuit for distributing the image data into...
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6670987 |
Chrominance signal processing circuit, chrominance signal processing method and camera using them
In white balance adjustment adopting a feedback control technique, after white balance has been established at a certain color temperature, a lead-in limiting frame may be shifted following the...
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6665007 |
Video camera system
It is difficult to simplify the structure of a video camera system having various adjusting functions. Therefore, the video camera system has an information-obtaining-region setting function for...
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6664973 |
Image processing apparatus, method for processing and image and computer-readable recording medium for causing a computer to process images
In an image processing apparatus according to the present invention, a brightest luminance value of the pixels of the processing image and a darkest luminance value of the pixels of the processing...
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6650363 |
Color suppression circuit and electronic camera using it
Based on an output from a CCD, a luminance signal Y 1 is extracted from an MTX circuit, and R gain and B gain of white balance information are extracted from a white balance control circuit. A...
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6642962 |
Merged pipeline for color interpolation and edge enhancement of digital images
A digital-camera processor receives mono-color digital pixels from an image sensor. Each mono-color pixel is red, blue, or green. The stream of pixels from the sensor has alternating green and red...
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6642957 |
Color signal processing circuit, method of the same and a camera apparatus
A color signal processing circuit comprising an amplification circuit having three gains for amplifying a color signal of red, green and blue color signals and amplifying the red, green and blue...
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6639628 |
Apparatus and method for processing color images
An apparatus and method for processing color images are provided. The apparatus includes a color conversion unit for white-transforming signals in RGB space. The color conversion unit includes a...
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6630956 |
Device and method for processing color signals employing vector operation color space conversion means
A color signal processing device for processing color signals outputted by an image pickup device provided with a color filter having color areas of N colors (N≧3) corresponding to each pixel is...
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6624847 |
Imaging system
The present invention is directed to an imaging system which corrects colors of taken images of objects at practical speed and displays the image colors correctly. The imaging system comprises an...
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6621519 |
Image pickup apparatus with white balance control based on brightness
An image pickup apparatus such as a video camera has the capability of automatic white balance control whereby the white balance is quickly adjusted for any object even just after an operator has...
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6618091 |
Image pickup apparatus having image signal state adjusting means a response characteristic of which is controlled in accordance with image magnification rate
An image pickup apparatus is capable of suppressing a sharp variation in the state of exposure due to a variation in a field of view or a subject image, by varying the response characteristics of...
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6618079 |
Color connecting apparatus for a video camera
A color correcting apparatus is arranged to enable color matching between a plurality of video cameras by operating each camera without requiring a reference camera. A color matching processing...
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6614606 |
Methods and apparatus for providing color images from monochromatic night vision and other electro-optical viewing devices
Apparatus and methods for converting a monochrome night vision or other electro-optical device into one that provide a sensation of full color, including from red to blue with white and black....
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6597396 |
Process for creating a color impression of a video image, and a processing device therefor
A process for balancing a video signal is set forth. In order to be able to utilize, with particular advantage in the medical field, processes that have been known for a long time, the video signal...
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6573932 |
Method for automatic white balance of digital images
A white balance correction method for a digital imaging device, including determining a scene illuminant type from a scene brightness and one or more color coordinate values; determining a white...
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6545710 |
Image pick-up apparatus
An image pick-up apparatus includes: an image sensing section which photoelectrically converts light from an object into an electrical output having a logarithmic function in relation to an amount...
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6542185 |
Method and apparatus for automated optimization of white and color balance on video camera
An image of an optical target including dark and light monochromatic patches is captured. An average YUV value is calculated from a predetermined number of YUV values for each monochromatic patch....
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6535245 |
Color balance adjusting device
The color balance adjusting device comprises buttons, indicated on a surface of a display device, which can be moved rightward and leftward on the surface, by dragging a mouse. In accordance with...
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