Patent ID: 7129961
Filing Date: 2006-10-31
Classification: G06T

Abstract:
1. A method comprising: preparing autocrop data for each image of a sequence of images, each image comprising a frame of video data; and storing autocrop data for each key frame of the sequence of images; wherein preparing autocrop data comprises determining the active region of a current image of the sequence of images; wherein determining the active region comprises selecting a portion of the current image as the active region of the current image such that all pixels outside the active region have no opacity; wherein selecting a portion comprises locating a first vertical line of pixels with at least one pixel having non-zero opacity closest to the origin of the current image, locating a second vertical line of pixels with at least one pixel having non-zero opacity furthest from the origin of the current image, locating a first horizontal line of pixels with at least one pixel having non-zero opacity closest to the origin of the current image, locating a second horizontal line of pixels with at least one pixel having non-zero opacity furthest from the origin of the current image, and storing data specifying the active region of the current image.