Image distortion correction

摘要

Methods and systems for reducing or eliminating distortion in an image are described. The approach generally involves determining the distortion introduced by a lens, and modifying a captured image to reduce that distortion. In one embodiment, the distortion information associated with a lens is determined. The distortion information is stored. A captured image taken by that lens is processed, with reference to the distortion information.

主权项

1. A method of reducing image distortion, said method comprising:
determining distortion information associated with a lens system, wherein said distortion information is associated with distortion at a plurality of focal lengths, and wherein said distortion information is further associated with color distortion; storing said distortion information; processing a captured image taken with said lens system, wherein said processing is performed with reference to said distortion information; and generating a corrected image comprising reduced image distortion compared to said captured image, wherein a shader of a graphics processing unit (GPU) is configured to perform said generating by calculating a corrected pixel value for each pixel in said corrected image based on a correction value for each pixel, wherein said correction value is obtained from a calibration texture, wherein said calibration texture is operable to correct a distortion introduced by said lens system, and wherein said shader is operable to be programmed by a texturing engine to use said calibration texture to output each pixel in a proper location in said corrected image.