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US 2013/0258146 A1Published application
Methods, systems and apparatuses for pixel value correction using multiple vertical and/or horizontal correction curves
AssigneeMicron Technology, Inc.
InventorGregory Michael Hunter
Life of this patent
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Abstract
Methods, systems and apparatuses are disclosed for approximating vertical and horizontal correction values in a pixel value correction calculation. Multiple vertical and/or horizontal correction curves are used and may be employed for one or more color channels of the imager. The use of multiple correction curves allows for a more accurate approximation of the correction curves for image pixels.
Claims19
1-67. (canceled)
An imaging device comprising:
- a pixel array comprising a plurality of pixels arranged in columns and rows, the pixel array outputting a plurality of pixel signals, each pixel signal corresponding to a particular pixel of the pixel array;
- an adjustment circuit coupled to the pixel array and configured to correct at least one of the plurality of pixel signals by:
- determining a correction value for a pixel signal to be adjusted, the correction value being based on a respective row and a respective column of the pixel corresponding to the pixel signal to be adjusted, and at least one of a vertical correction value portion and a horizontal correction value portion;
- and
- applying the correction value to the pixel signal;
- wherein the vertical correction value portion for the pixel signal to be adjusted is determined from at least one of a plurality of vertical correction value curves, each of the plurality of vertical correction value curves representing vertical correction value portions for all pixels in a particular column of the pixel array with which the respective vertical correction value curve is associated, and
- wherein the horizontal correction value portion for the pixel signal to be adjusted is determined from at least one of a plurality of horizontal correction value curves, each of the plurality of horizontal correction value curves representing horizontal correction value portions for all pixels in a particular row of the pixel array with which the respective horizontal correction value curve is associated.
4 more elements
A method of adjusting a value for a pixel of an image, comprising:
- inputting an image pixel signal value associated with a pixel to be adjusted;
- determining a location in a pixel array of the pixel to be adjusted;
- and
- adjusting the image pixel signal value, wherein the adjusting further comprises:
- determining a correction value for the pixel to be adjusted, the correction value being based on the location in the pixel array of the pixel to be adjusted, and at least one of a vertical correction value portion and a horizontal correction value portion;
- and
- applying the correction value to the pixel signal value,
- wherein the vertical correction value portion for the pixel to be adjusted is determined from at least one of a plurality of vertical correction value curves, each of the plurality of vertical correction value curves representing vertical correction value portions for all pixels in a particular column of the pixel array with which the respective vertical correction value curve is associated, and
- wherein the horizontal correction value portion for the pixel to be adjusted is determined from at least one of a plurality of horizontal correction value curves, each of the plurality of horizontal correction value curves representing horizontal correction value portions for all pixels in a particular row of the pixel array with which the respective horizontal correction value curve is associated.
6 more elements
Dependencies are inferred from the claim text.