| Patent application number | Description | Published |
|---|
| 20080252759 | Method, apparatus and system providing green-green imbalance compensation - Method, apparatus and system for determining a value for green-green imbalance and applying the value to green pixels to correct the imbalance are described. Average pixel values of green pixels within a kernel are calculated and an imbalance value is determined based on the averages. The imbalance value is added to or subtracted from all green pixel response values in the kernel to correct the imbalance. | 10-16-2008 |
| 20080259180 | Methods, systems and apparatuses for high-quality green imbalance compensation in images - Methods, systems and apparatuses for determining and compensating for green imbalance in imagers. An estimated local green balance correction term is limited, e.g., between an upper and lower limit. The upper and lower limits are determined from a set of parameters. The parameters are determined during a calibration procedure. The parameters may be stored for a subset of possible pixel locations and parameters for each pixel not at a location corresponding to stored data may be determined by interpolation | 10-23-2008 |
| 20080298708 | Methods and apparatuses that reduce noise in image signals - Methods and apparatuses for noise reduction of imager pixels signals. A weighted combination based on the presence of edges of two calculated demosaiced signals is used to produce a noise reduced signal. The noise reduced signal may be sharpened based on a calculated luminance of the two demosaiced signals. | 12-04-2008 |
| 20080298794 | Methods and apparatuses for image exposure correction - Methods and apparatuses for image exposure include capturing a first image under a first illumination condition, determining a luminance of the first image at a plurality of sectors, capturing a second image under a second illumination condition employing an artificial light source, determining a luminance of the second image at the plurality of sectors, and determining if the artificial light source should be used to capture a final image using the luminances of the first and second images at the plurality of sectors. If the artificial light source is to be used, an output level of the light source is determined. | 12-04-2008 |
| 20090027727 | Method, apparatus, and system for reduction of line processing memory size used in image processing - A method, apparatus, and system are provided by which image line data of an image frame is compressed before being stored to image line memory used in multiple image line processing. | 01-29-2009 |
| 20090237530 | METHODS AND APPARATUSES FOR SHARPENING IMAGES - Methods and apparatuses for sharpening imaging pixel signals. Embodiments provide methods of sharpening that preserves the pixel's saturation and apparatuses therefor. In essence, rather than changing only the pixels' luminance, the effective exposure of the pixel is changed. | 09-24-2009 |
| 20090245632 | METHOD AND APPARATUS FOR IMAGE SIGNAL COLOR CORRECTION WITH REDUCED NOISE - A method and apparatus for applying color correction to image signals provides different color corrections depending on a characterization associated with a pixel signal being processed or the gain applied to the pixel signal such as a value of a pixel signal being processed. The color corrections may be configured such that darker pixels have less color correction applied to them. | 10-01-2009 |
| 20090322901 | Method and apparatus providing rule-based auto exposure technique preserving scene dynamic range - A method and apparatus for applying exposure compensation to an image. Exposure correction limits inclusion of, but does not ignore, image highlights and lowlights. | 12-31-2009 |
| 20100020207 | CORRECTION OF NON-UNIFORM SENSITIVITY IN AN IMAGE ARRAY - An improved non-uniform sensitivity correction algorithm for use in an imager device (e.g., a CMOS APS). The algorithm provides zones having flexible boundaries which can be reconfigured depending upon the type of lens being used in a given application. Each pixel within each zone is multiplied by a correction factor dependent upon the particular zone while the pixel is being read out from the array. The amount of sensitivity adjustment required for a given pixel depends on the type of lens being used, and the same correction unit can be used with multiple lenses where the zone boundaries and the correction factors are adjusted for each lens. In addition, the algorithm makes adjustments to the zone boundaries based upon a misalignment between the centers of the lens being used and the APS array. | 01-28-2010 |
| 20100066857 | Methods, systems and apparatuses for white balance calibration - Methods, systems and apparatuses for white balance calibration. A calibration correction matrix is specifically calibrated for each individual imager, thereby providing improved automatic white balance performance. The individual imager calibration corrects for variation of the spectral response among different imagers. The calibration correction matrix is placed before the gray checker module, which analyzes the chromaticity of the image pixels and supplies resulting statistics to the automatic white balance decision engine for use in automatic white balance operations. The calibration correction matrix may be implemented as a 3×3 matrix. | 03-18-2010 |
| 20100243899 | AMBIENT INFRARED DETECTION IN SOLID STATE SENSORS - A solid state imaging device includes an array of active pixels and an infrared cut filter formed over the sensor. Optionally, a slot in the infrared cut filter allows infrared illumination to reach the sensor to be detected by pixels covered by a visually opaque filter and surrounded by pixels of special types that limit charge leakage and enable high dynamic range sensing of infrared illumination. A ratio of average infrared signal to average brightness indicates an amount of infrared illumination reaching the imaging device. | 09-30-2010 |
| 20100328491 | METHOD, APPARATUS AND SYSTEM FOR DYNAMIC RANGE ESTIMATION OF IMAGED SCENES - A method, apparatus, and system for dynamic range estimation of imaged scenes for automatic exposure control. For a given exposure time setting, certain areas of a scene may be brighter than what a camera can capture. In cameras, including those experiencing substantial lens vignetting, a gain stage may be used to extend dynamic range and extract auto-exposure data from the extended dynamic range. Alternatively, dynamic range can be extended using pre-capture image information taken under reduced exposure conditions. | 12-30-2010 |
