Patent ID: 7613357
Filing Date: 2009-11-03
Classification: G06K

Abstract:
1. Method for calculating undistorted integral features without generating an undistorted image for use in a computer vision object recognition system, comprising: within a microprocessor, calculating a distorted integral image delimited by a predetermined region by integrating over the predetermined region the product of a distorted input image captured in a distorted image space and a predetermined vector transformation between an undistorted image space and the distorted image space; generating the undistorted integral features by adding and subtracting values of the distorted integral image without generating an undistorted image; and utilizing the undistorted integral features in an object classifier-based computer vision object recognition system; and wherein the undistorted integral features describe a restricted set of object features for recognition in the input image in the undistorted image space; and wherein the distorted integral image comprises a numerical sum of image pixel values in the predetermined region of the distorted input image.