Patent ID: 9438814
Filing Date: 2016-09-06
CPC Classification: H04N

Claim Text:
1. A method for identifying stray light in a plurality of images of a scene using a camera comprising an image sensor, and a lens assembly comprising a lens for focusing light onto the image sensor, an aperture unit having an aperture gate arranged in an aperture plane, said aperture gate having a position, a shape and/or a size being adjustable in said aperture plane by using said aperture unit, said method comprising: acquiring, by using said camera, the plurality of images of said scene, wherein each image of said plurality of images is acquired using an unique aperture gate setting within said plurality of images, wherein said unique aperture gate setting corresponds to a unique combination of the position, the shape and/or the size of said aperture gate in said aperture plane, dividing each of said plurality of images into corresponding pixel groups, calculating a mean pixel level or a contrast value pixels comprised in said corresponding pixel groups of each of said plurality of images, and comparing calculated mean pixel levels or contrast values for identifying stray light in said plurality of images.