Patent ID: 7860273
Filing Date: 2010-12-28
Classification: G01C,G06T

Abstract:
1. A position measuring device comprising: an image acquisition section for acquiring a series of photographed images changing continuously or changing little by little along with position displacement relative to an object to be photographed; a positional relationship measurement section for measuring position displacement and posture change of the image acquisition section; a feature extraction section for extracting feature points from the photographed images obtained with the image acquisition section; a feature point tracking section for tracking the feature points by searching corresponding points corresponding to the feature points on a plurality of the photographed images; an image selection section for selecting an image to be precessed from the series of photographed images based on a measurement result made with the positional relationship measurement section; and a position measurement section for measuring the photographing position and photographing posture of the image acquisition section or position of the photographed object based on the image to be processed selected with the image selection section.