Qualcomm Incorporated

Silicon Optix Inc.

Synaptics Corporation

Geo Semiconductor Inc.

Vladimir Lachine

Louie Lee

Gregory Lionel Smith

Zorawar Singh Bassi

Jeffrey Kar Fai Wong

Ye-long Chiou

Futoshi Hayashida

Greg Smith

Chon-Tam Le Dinh

Dinh Kha Le

Described herein are methods and devices that employ parallel compression of image data using a lossless compressor and a quantization compressor. As described, the lossless compressor generates a variable length compressed bit stream and the quantization compressor generates a fixed length compressed bit stream. The fixed length bit stream is always equal in size to a size requirement of an output memory block. The variable length bit stream may be stored in the output memory block unless it exceeds the memory requirement in size, in which case the fixed length bit stream may be stored to the output memory block.

Image compression method and apparatus for bandwidth saving

A liquid crystal display (LCD) system including a liquid crystal (LC) panel; an LC panel controller to send output code values to the LC panel; a backlight to illuminate the LC panel; a backlight controller; and a display controller to control the backlight controller and the LC panel controller, and receive input code values from an image source is presented wherein the LCD system uses a dynamic knee point determination of soft clipping to provide output code values to the LC panel. A method for using an LCD system as above is also provided.

Backlight dimming ratio based dynamic knee point determination of soft clipping

A method and a system for adaptive image enhancement are provided for measuring the image quality of a pixel region in a frame, performing an image classification based on the image quality measurement, and enhancing image quality by applying operations according to image classification of the region. Also provided is a method as above including the steps of dividing a frame into P pixel regions; and for each one of the pixel regions measuring the image quality; assigning an image quality class; and enhancing the image. Also provided is a system for adaptive image enhancement including a circuit to measure the image quality of a pixel region in a frame in a source video image; a circuit to perform an image classification of the region based on the image quality measurement; and a circuit to enhance the image quality of the region in the source video image a by applying operations based on the image classification of the frame.

Method and system for detection and enhancement of video images

Systems and methods for correcting color and geometry in an image are disclosed. In one example, image data are received in one format and are then converted to another format to perform color correction. In another example, geometric corrections are first applied to each color component of an image data to correct for different distortions including lateral chromatic aberrations. Next, color distortion corrections are performed to correct for each color component of the image data independently. In one particular exemplary embodiment, color distortion corrections are applied using surface function representation of a grid data transformation relating uncorrected values to corrected values.

Color and geometry distortion correction system and method

An edge adaptive system and method for image filtering. The method maps each output pixel onto input image coordinates and then prefilters and resamples the input image pixels around this point to reduce noise and adjust the scale corresponding to a particular operation. Then the edge in the input image is detected based on local and average signal variances in the input pixels. According to the edge detection parameters, including orientation, anisotropy and variance strength, the method determines a footprint and frequency response for the interpolation of the output pixel. In a more particular implementation, the method divides the input pixel space into a finite number of directions called skews, and estimates the edge orientation with the nearest skew direction. This further facilitates pixels inclusion in the interpolation of the output pixel.

Edge adaptive image expansion and enhancement system and method

A method and system for circularly symmetric anisotropic filtering over an extended elliptical or rectangular footprint in single-pass digital image warping are disclosed. The filtering is performed by first finding and adjusting an ellipse that approximates a non-uniform image scaling function in a mapped position of an output pixel in the input image space. A linear transformation from this ellipse to a unit circle in the output image space is determined to calculate input pixel radii inside the footprint and corresponding filter coefficient as a function of the radius. The shape of the footprint is determined as a trade-off between image quality and processing speed. In one implementation, profiles of smoothing and warping components are combined to produce sharper or detail enhanced output image. The method and system of the invention produce natural output image without jagging artifacts, while maintaining or enhancing the sharpness of the input image.

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Toronto, Canada

Vladimir Lachine