Patent ID: 6377241
Filing Date: 2002-04-23
Classification: G06F

Abstract:
A direction instructing apparatus comprising:an image inputting unit for inputting data for a two-dimensional image obtained by an image sensor, wherein the two-dimensional image comprises an array of pixels, each pixel having a value related to brightness of the pixel; a projection computing unit for computing projections in a plurality of directions for the two-dimensional image, wherein the projection computing unit computes the projections for each of the plurality of directions as a plurality of sums of the values of the pixels along each of a plurality of lines parallel to each of the directions; a movement computing unit for computing a one-dimensional movement vector for each of the projections computed by said projection computing unit; and a direction estimating unit for estimating a two-dimensional movement vector for the two-dimensional image according to the one-dimensional movement vectors computed by said movement computing unit.