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A distance measuring apparatus applicable to a mobile body such as an automotive vehicle which detects a position of an obstacle (a target object) without influence of an ambient environment such as a white line and determines positions of lateral ends of the obstacle is disclosed. In the distance m

A distance measuring apparatus applicable to a mobile body such as an automotive vehicle which detects a position of an obstacle (a target object) without influence of an ambient environment such as a white line and determines positions of lateral ends of the obstacle is disclosed. In the distance measuring apparatus, a pair of electronic cameras are mounted on the mobile body, optical axes of both of the cameras being mutually parallel to each other and being directed toward a forward direction or toward a rearward direction and horizontal axes of their photograph planes being aligned to the same line. Using a new stereophotographic image processing, deriving a parallax for each window from a calculated difference in position between one image and another image, voting to each position in a table of parallax x lateral position, calculating a distance to the obstacle on the basis of the value of the parallax at any one of horizontal positions in the table at which a result of voting indicates a higher value, deriving a horizontal range on the one image on the basis of the horizontal positions of respective windows corresponding to any positions in the table at each of which the result of voting indicates the higher value, deriving a vertical range at each end of which a histogram value of histograms indicates a higher value, and, selecting any one of present longitudinal edges located in the vicinity of each end of the horizontal range from among searched longitudinal edges.

대표청구항

tudinal edge selected by the edge selecting section.

tudinal edge selected by the edge selecting section.