Marvell International Limited

Agilent Technologies, Inc.

Brian S Watson

Jay McDougal

Pamela Voss

Jerry A Marshall, Jr

Jeffrey G Schoper

Embodiments provide techniques for enhancing an existing image after image acquisition. These techniques include sub-sampling the original image, identifying and/or deriving local region brightness, and using the local region brightness to enhance the contrast of pixels within these regions in the original image. Sub-sampling is generally used to reduce the number of pixels and corresponding computational load. Local region brightness is localized brightness in an image determined based on the dark and light regions within the image by, for example, using a 2-D Gaussian filter. The use of the local region brightness to enhance the image may be accomplished using a lookup table that may be configured to implement a variety of techniques, for example, contrast overlay, Alpha blending, and the like, for contrast enhancement in the dark and light regions.

Shadow and highlight image enhancement

Embodiments of the present disclosure provide a method comprising accessing a first pixel that is neighboring to a second pixel of an image, the first pixel including a plurality of color fields, each color field of the plurality of color fields associated with a respective color plane, wherein the second pixel is to be processed as a target pixel; quantizing the plurality of color fields to generate a corresponding plurality of quantized color fields, wherein said quantizing the plurality of color fields is based on a contribution of individual color planes of the plurality of color planes towards an intensity of the image; and processing the target pixel based at least in part on the plurality of quantized color fields. Other embodiments are also described and claimed.

Method and apparatus for selectively using quantized pixel fields of neighboring pixels to process a target pixel

Intensity based pixel quantization

Embodiments of the present disclosure provide a method for adjusting parameters of an algorithm for enhancing an image. In various embodiments, the method includes automatically analyzing an image to identify at least one image attribute; based on the at least one image attribute, automatically determining a value of at least one parameter for an image processing algorithm; and applying the value of at least one parameter to the image processing algorithm. Other embodiments are also described and claimed.

Method and apparatus for automatically tuning a parameter of an image enhancement algorithm based on an attribute of an original image

Pulse width modulation systems and methods are described. In one aspect, a pulse width modulation system includes a register and a code word generator. The code word generator has an input for receiving a specified output frequency and a specified duty cycle and is operable to generate code words of different lengths. The code word generator is operable to generate a base code word having a length set to achieve the specified output frequency and having a thermometer code value set in accordance with the specified duty cycle. The code word generator is further operable to load the register with a code word pattern including a sequence of one or more copies of the base code word.

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Dallas, OR, United States of America

Brian S Watson