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| Number | Title | Issue Date |
| 8081242 | Imaging apparatus and imaging method An imaging apparatus, includes: an image sensor having a light receiving surface with a plurality of pixels and a plurality-of-color separation filter, which receives light from a photographic subject which is incident via an optical system on the surface via the fi... | 12/20/2011 |
| 7440015 | Gamma correction method and system A gamma correction method and system, which performs a gamma correction on an n-bit video signal to thus generate a gamma correction value. At first, a first primary index and a first sub-index are obtained by performing an index mapping on a value of the video sign... | 10/21/2008 |
| 7362382 | Automatic gain control circuitry To provide an automatic gain control circuitry which effectively works for a video signal of which pedestal level in an effective video period is different from the pedestal level in the vertical blanking period. The automatic gain control circuitry comprises a firs... | 04/22/2008 |
| 7362908 | Adaptive generation of Q-table2 for improved image quality Brightness correction and image enhancement are derived to compensate for changes in captured image data by hardware scanners and the like by statistically measuring the captured data and generating or selecting a compensation quantization table to be substituted in... | 04/22/2008 |
| 7312834 | Image processor, semiconductor integrated circuit, and method for processing an image An image processor includes a luminance signal processor configured to execute an amplification by utilizing a gain set by a plurality of gain step-sizes including a first gain step-size and a second gain step-size less than the first gain step-size, to an image sig... | 12/25/2007 |
| 7289663 | Producing an extended color gamut luminance-chrominance digital image from a captured image A method for producing an extended color gamut luminance-chrominance digital image from a captured digital image includes determining an estimate of the colors of the captured digital image of an original scene and further processing to produce an extended range out... | 10/30/2007 |
| 7280260 | Color converting apparatus and color converting method for converting input image data into converted image data For each paper type, a plurality of two-dimensional excitation characteristics tables Ti are provided in one to one correspondence with a plurality of colors i. The excitation characteristics table Ti for each color i contains a plurality of sets of excitation-refle... | 10/09/2007 |
| 7227543 | Contrast adjusting circuitry and video display apparatus using same With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) o... | 06/05/2007 |
| 7158306 | Light separator A light separator splits polychromatic light into longer and shorter wavelength spectral bands. The light separator is defined between opposing side surfaces that are reflective to incident light and further has an input side for accepting the polychromatic light an... | 01/02/2007 |
| 7133069 | System and method to increase effective dynamic range of image sensors A system and method of increasing the dynamic range of image sensors by controlling the exposure (either electronically or mechanically) of multiple images and optionally forming a composite image from the properly exposed areas of the multiple images of varying exp... | 11/07/2006 |
| 7133073 | Method and apparatus for color interpolation An imaging method and system that flexibly accesses light sensor elements and processes imaging signals. The imaging system comprises an array of pixel sensor cells, an array controller and a readout control circuit. The imaging system provides color interpolation. | 11/07/2006 |
| 7126632 | Method and apparatus for modifying the color saturation of electronically acquired images A method for the transformation of image signals that have been obtained by color filtering and have been logarithmically compressed is proposed. The color saturation of the recorded images is increased thereby. According to one aspect of the invention, the transfor... | 10/24/2006 |
| 7120303 | Adaptive generation of Q-table2 for improved image quality Brightness correction and image enhancement are derived to compensate for changes in captured image data by hardware scanners and the like by statistically measuring the captured data and generating or selecting a compensation quantization table to be substituted in... | 10/10/2006 |
| 7113207 | Chrominance signal processing apparatus, image-sensing apparatus and control methods for same The present invention relates to a chrominance signal processing apparatus and method for providing optimal color processing according to the hue of the color image data. Red, green and blue signals are input to a chroma composition ratio determination circuit that ... | 09/26/2006 |
| 7088372 | Image display apparatus, image display method and computer-readable recording medium storing image display program An image display apparatus in which image signals of a plurality of primary colors are transformed by an image processing section into color space that includes lightness and chromaticity. When the chromaticity (color vividness) in this color space is being correcte... | 08/08/2006 |
| 7088388 | Method and apparatus for calibrating a sensor for highlights and for processing highlights A method and apparatus for calibrating a sensor for highlights and for processing highlights is described. In an embodiment, a method includes identifying highlight regions in an image of a scene. The method further includes calculating flare intensity values for th... | 08/08/2006 |
| 7081923 | Method and system for adjusting image brightness based on color saturation components A method for adjusting image brightness is conducted by a system for adjusting image brightness. Digital image data acquired by a data acquisition unit are sent to a lightness computing unit and a color saturation computing unit that compute the lightness L and the ... | 07/25/2006 |
| 7061528 | Signal processing apparatus which suppresses a color signal according to luminance level To provide a signal processing apparatus and an image pickup signal processing method both of which restrain a color signal from being influenced by band limitation in a color processing system, thereby enabling signal processing which produces an undegraded image, ... | 06/13/2006 |
| 6999116 | Image processing apparatus, method and computer-readable storage medium having a color suppression mechanism An image processing apparatus for reducing image deterioration caused by a saturated area of an image signal obtained from an image sensor. Specifically, an image signal output from a CCD has a saturated portion that is detected by a saturation detector and has red,... | 02/14/2006 |
| 6972793 | Video signal processing device and its method The object of the present invention is to improve the quality of picture in the image. According to the present invention, by forming the luminance signal of pixel based on red signal, green signal and blue signal per pixel of video signal by the luminance signal fo... | 12/06/2005 |
| 6970208 | Block move engine with gamma and color conversions An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a first portion of an output data stream in response to a first portion of an input data stream. The second circuit may be configured to present a second por... | 11/29/2005 |
| 6963364 | Method of improving a signal in a sequence of images acquired with a digital color video camera A method of improving a signal in an image sequence acquired with a digital color video camera creating a digital video signal (1) including a brightness signal component (3) and a color signal component (4) includes the steps (6, 7) of c... | 11/08/2005 |
| 6958784 | Video signal processing apparatus using multi-conversion stages A video signal processing apparatus for processing a video signal containing first and second color difference signals so as to adjust colors of an image represented by the video signal is disclosed. The apparatus includes a plurality of gain setting sections for se... | 10/25/2005 |
| 6930711 | Signal processing apparatus and method A signal process for interpolating color signals is executed. In this process, color image data output from image sensor covered by a plurality of color filters that form a predetermined matrix is interpolated, horizontal and vertical correlation levels are discrimi... | 08/16/2005 |
| 6833876 | Using a reduced memory look up table for gamma correction through interpolation A method of CRT gamma correction of n-bit color and corresponding device are presented which employ a reduced size lookup table. An n-bit input signal is separated into its m most significant bits and (n−m) least significant bits. Instead of using its full n-bit v... | 12/21/2004 |
| 6816200 | Method and apparatus for detecting camera sensor intensity saturation A method for detecting intensity saturation of a light sensor includes monitoring an electrical signal from a light sensor for detecting an intensity saturation condition of at least one pixel of the light sensor, converting the electrical signal to a digital signal... | 11/09/2004 |
| 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 the displacement of the buttons, gains of a red component s... | 03/18/2003 |
| 6515700 | Picture signal processing apparatus, color video camera and picture signal processing method Of three-color signals R', G' and B', obtained as output signals of multipliers 156R, 156G and 156B, designed to effectuate luminance compression of the three-color signals R, G and B sent to input terminals 151R, 151G and 151B by multiplying the signals ... | 02/04/2003 |
| 6215529 | Gamma compensation apparatus Aiming to improve color reproducibility of a red part having high color saturation, a gamma compensation apparatus of the present invention is composed of a bending point setting block 100a and a gamma compensation block 101a and bending point setting blo... | 04/10/2001 |
| 6111607 | Level compression of a video signal without affecting hue of a picture represented by the video signal A level compression and/or gradation conversion of a video signal are performed without causing any change in the hue of a picture represented by that video signal. The knee compression and/or gradation conversion are carried out by multiplying red, green... | 08/29/2000 |
| 6040858 | Method and apparatus for expanding the dynamic range of sensed color images Disclosed is an image processing method of expanding the dynamic range by determining a saturated or noise region in an image signal and replacing the image signal with a proper image signal. A threshold value is set in units of colors on the basis of a s... | 03/21/2000 |
| 5953059 | Color signal processing circuit with hue/gain control and frequency conversion mechanisms A color signal processing circuit of a camera DSP chip for use with a CCD includes a matrix circuit for converting color signals from the CCD into R-G and B-G signals, a hue/gain controlling circuit for multiplying the R-G signal by a R-hue coefficient an... | 09/14/1999 |
| 5949482 | Optimization processing for integrated circuit physical design automation system using optimally switched cost function computations There is provided a signal processing apparatus for processing input three primary color signals, which is capable of providing natural color reproduction. Input color signals R to B are subjected to a matrix operation to obtain color difference signals (... | 09/07/1999 |
| 5929417 | Image reading apparatus with data density and gamma correction means An image reading apparatus in which reference density data corresponding to a reference document having a predetermined reference density is stored in advance, while a plurality of gamma correction curves are also stored in advance. Light intensity data i... | 07/27/1999 |
| 5880782 | System and method for controlling exposure of a video camera by utilizing luminance values selected from a plurality of luminance values A video camera system and method for automatically controlling the exposure of a desired object image. A plurality of average luminance values are respectively determined by a plurality of light measurement units. A plurality of reference luminance values... | 03/09/1999 |
| 5767899 | Image pickup device In an image pickup device for generating a corrected luminance signal by subtracting two color difference signals as correction signals from a luminance signal, a correction signal is generated by base-clipping at least one of the two color difference sig... | 06/16/1998 |
| 5729299 | Knee correction A knee circuit in which the hue on the output side does not differ from the hue on the input side. The knee circuit includes a virtual luminance signal generator for generating a virtual luminance signal Y based on at least one input color signal Rin, Gin... | 03/17/1998 |
| 5712683 | Level adjusting circuit of color image signal A signal level adjusting circuit for performing adjustment of signal levels in which the levels of individual image signals are made uniform so as to provide greater use of a dynamic range on an image sensor without deterioration to resolution.... | 01/27/1998 |
| 5691821 | A/D converting apparatus and image sensing apparatus A low-cost A/D converting apparatus having a high precision includes a first A/D converter to which an analog input signal is applied as an input, a plurality of D/A converters to which an output from the first A/D converter is applied as an input, a subt... | 11/25/1997 |
| 5659358 | Image pickup device with digital signal processing for reducing signal distortion An image pickup device comprises variable gain control circuits 11-13 and 23-25 for respective channels of digital color signals and luminance signals to control the gains by a gain control signal SG. Since the gains are variable in the digital signal cha... | 08/19/1997 |
