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US 7,088,388 B2Granted
Method and apparatus for calibrating a sensor for highlights and for processing highlights
AssigneeEastman Kodak Company
InventorsSteven D. MacLean, Roger A. Morton, Kenneth A. Parulski, Nestor M. Rodriguez
Life of this patent
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Abstract
A method and apparatus for calibrating a sensor for highlights and for processing highlights is described. In an embodiment, a method includes identifying highlight regions in an image of a scene. The method further includes calculating flare intensity values for the image using the locations of the highlight regions. The method also includes subtracting the flare intensity values from the image.
Claims2
An electronic camera, comprising:
- a multi-mode image sensor having an array of light sensitive elements, wherein the sensor provides an output signal derived from the array, and wherein the output signal has a transfer function that includes a normal sensitivity region, a highlight sensitivity region, and a breakpoint between the regions;
- and
- a correction circuit for correcting differences between breakpoints of the transfer function, wherein the differences are caused by different light sensitive elements of the array, and wherein the correction circuit includes at least one lookup table, wherein the at least one lookup table has an input to identify a plurality of particular light sensitive elements of the array, and wherein the at least one lookup table has an output to provide a same cluster identifier for each of the plurality of particular light sensitive elements.
Dependencies are inferred from the claim text.