Patent ID: 8218041
Filing Date: 2012-07-10
Classification: H04N

Abstract:
1. A method for the correction of aperture shading effects on images from digital camera systems with at least one pupil lens plane and a separate, axially distended aperture plane, comprising the following steps: (1) providing a digital camera comprising at least one lens pupil plane and a separate aperture plane; (2) setting aperture and taking an image; (3) checking if object rays that pass through the pupil can be blocked by the aperture and, if so, go to step (6), else go to step (4); (4) checking if object rays that pass through the aperture can be blocked by the pupil and, if so, go to step (6), else go to step (5); (5) performing lens shading correction and go to step (10); (6) performing lens shading correction; (7) determining one or more Variable camera system parameters to correct for aperture shading depending on corrective equation form elected; (8) generating aperture shading correction (ASC) equation from said one or more camera system parameters determined; (9) applying the ASC to captured image; and (10) end.