IMAGE MEASUREMENT PROCESSOR, IMAGE MEASUREMENT PROCESSING METHOD AND IMAGE MEASUREMENT PROCESSING PROGRAM BY SINGLE CAMERA

摘要

PROBLEM TO BE SOLVED: To provide an image measurement processor capable of accurately recognizing the three-dimensional position coordinates of a feature point on an object to be measured by a single camera.;SOLUTION: The image measurement processor includes a single camera and an information operation terminal. In the information operation terminal, storage means stores the internal orientation element of the camera and the actual coordinates of the feature points of at least four points (provided that arbitrary three points of the four points are not present on one straight line) of the object to be measured beforehand. Data transfer means fetches a camera image including the feature points of four points inside a camera view field. Operation means corrects distortion on the image on the basis of the internal orientation element for the camera view coordinates of the feature points on the fetched image, calculates a camera position and a camera angle in a coordinate system for which the object to be measured when photographing the image is a reference from the camera view coordinates and actual coordinates of the distortion-corrected feature points, and calculates the three-dimensional coordinates of the feature points in the coordinate system of the camera reference using coordinate transformation for which the calculated camera position and camera angle when photographing the image are a reference position and a reference angle.;COPYRIGHT: (C)2012,JPO&INPIT