Method of reducing purple fringing in images
AssigneeAxis AB
InventorsSebastian FORS, Johan JEPPSSON
Life of this patent
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Abstract
A method of reducing purple fringing in images captured by a camera, comprises: acquiring a raw image of a scene with an image sensor of the camera, demosaicing the raw image, and applying an adjusted color correction matrix to the demosaiced raw image. The adjusted color correction matrix is deduced by calibrating the spectral response of the image sensor to a color rendition chart to which the color data of a purple fringe has been added, and furthermore the color correction matrix is adjusted such that the image sensor response for color values of the purple fringe is transformed into color values of a predetermined replacement color following application of the color correction matrix.
Claims14
A method of reducing purple fringing in images captured by a camera, the method comprising:
- acquiring a raw image of a scene with an image sensor of the camera,
- demosaicing the raw image,
- applying an adjusted color correction matrix to the demosaiced raw image,
- wherein the adjusted color correction matrix is deduced by calibrating the spectral response of the image sensor to a color rendition chart to which the color data of a purple fringe has been added, and wherein the color correction matrix is adjusted such that the image sensor response for color values of the purple fringe is transformed into color values of a predetermined replacement color following application of the color correction matrix.
Dependencies are inferred from the claim text.