Patent ID: 7812931
Filing Date: 2010-10-12
Classification: G01S

Abstract:
1. A distance measurement device, comprising: a light irradiating part configured to irradiate a first light beam having a constant variation rate of a prescribed characteristic feature with respect to the irradiation angle and a second light beam having different variation rates of said characteristic feature depending on the irradiation angle; an image pickup part configured to pick up images under irradiation of said light irradiating part; an object region extracting part configured to extract a region where said variation rate of the characteristic feature is constant as the region where an object is present from the image obtained with said first light beam among the images picked up by said image pickup part; an irradiation angle information computing part configured to determine a variation of said characteristic feature from the image obtained with said second light beam among said images picked up by said image pickup part, and to determine the irradiation angle information of said second light beam from the variation; and a distance information computing part configured to compute distance information to the object corresponding to said object region for each said object region from the irradiation angle information determined with said irradiation angle information computing part, wherein a position information on the image is determined with said image pickup part of said object region, and the position relationship information between said light irradiating part and said image pickup part.