Patent ID: 9007489
Filing Date: 2015-04-14
Classification: H04N

Abstract:
1. A method of operating an electronic device having a light source and an array of image pixels, wherein each image pixel includes a photosensitive element, first and second storage nodes, and first and second transfer transistors coupled between the photosensitive element and the first and second storage nodes, the method comprising: with the photosensitive element and the first and second storage node of each image pixel, capturing time-multiplexed flash-image data and no-flash-image data; generating a flash image and a no-flash image from the time-multiplexed flash-image data and no-flash-image data; comparing flash-image pixel values of the flash image with no-flash-image pixel values of the no-flash image; and generating a matte image using the comparison of the flash-image pixel values of the flash image with no-flash-image pixel values of the no-flash image, wherein the matte image includes matte pixel values that indicate whether each pixel in the matte image is a foreground object pixel or a background object pixel, wherein capturing the time-multiplexed flash-image data and no-flash-image data comprises: