Method and apparatus for wavelength specific correction of distortion in digital images

摘要

A method and apparatus for digital image correction in which a plurality of received color component arrays received from a digital camera are each corrected for distortion dependent upon the color associated with the array. Other corrections may also be applied, such as for sensitivity non-uniformity in the sensing array or illumination non-uniformity. The corrected color component arrays for each of the plurality of color components are combined to form a corrected digital image. The method and apparatus may be integrated with digital cameras in a variety of applications including, but not limited to, digital document imaging.

主权项

1. An apparatus for correcting a digital image of an object, the apparatus comprising:
a digital camera operable to capture one or more images comprising a plurality of color component arrays that correspond to a plurality of color components of light from the object; an image processor, operable to process the plurality of color component arrays to produce a plurality of corrected color component arrays, and an image combiner, operable to combine the plurality of corrected component arrays to form the corrected digital image, wherein the image processor comprises at least one distortion correction module operable to adjust the locations of pixels in a color component array of the plurality of color component arrays by amounts dependent upon the wavelength of the corresponding color component and a mathematical model of distortion introduced by the digital camera to obtain a corrected color component array.