| 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 |
| 20080266444 | Method, apparatus, and system for continuous autofocusing - A method, apparatus, and system for continuously focusing an imaging device in a video mode is disclosed. An autofocus process is used to adjust the distance between an image sensor and a lens in the imaging device based on one or more hidden frames that are not output as part of the video frame output. The hidden frames can have a smaller resolution than the output frames and can be captured under different conditions than the video output frames. | 10-30-2008 |
| 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 |
| 20090027517 | Method, apparatus, and system for pre-compression assessment of compressed data length - A method and apparatus are disclosed for image processing using dynamic assessment of image line data to select a compression technique for compressing the image line data prior to storage in a line buffer used for an image processing operation. Compressing the image line of data prior to storage in the line buffer permits reduction in the size of the line buffer. The compressed image data may be decompressed prior to the image processing. | 01-29-2009 |
| 20090101796 | Methods, systems and apparatuses using barrier self-calibration for high dynamic range imagers - Methods, systems and apparatuses proving a high dynamic range imager. Multiple photosensor integration periods are used to capture pixel signal information. A transistor gate is used to remove electrons from the photosensor between the two successive integration periods providing a non-linear pixel response characteristic having a knee point. Each pixel is calibrated for the knee point which is used during adjustment of the pixel output signal. Each pixel may also be calibrated with an arbitrary signal response curve for multiple light intensities. | 04-23-2009 |
| 20090136150 | METHOD AND APPARATUS FOR REDUCING IMAGE ARTIFACTS BASED ON APERTURE-DRIVEN COLOR KILL WITH COLOR SATURATION ASSESSMENT - A method and apparatus for reducing false color artifacts in digital images. Aperture correction and color saturation values are determined for a portion of an image surrounding a subject pixel. A color attenuation value is determined based at least in part on the aperture correction and color saturation values. A color value of the subject pixel is adjusted by an amount based at least in part on the color attenuation value. In one exemplary embodiment, the method and apparatus operate in the YUV color space and adjust U and V values of the subject pixel proportionally to the color attenuation value. | 05-28-2009 |
| 20090162045 | Image stabilization device and method - An imaging device and processes to provide image stabilization by controlling analog gain and integration time. Analog gain and integration time for images are determined by comparing an image in various frames, whether full frames or hidden frames, where the image is provided with differently set analog gain and integration time settings to determine settings for stabilized image capture. | 06-25-2009 |
| 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 |
| 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 |
| 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 |
