CORRESPONDING POINT RETRIEVAL METHOD, MUTUAL LOCATION METHOD, THREE-DIMENSIONAL IMAGE MEASUREMENT METHOD, CORRESPONDING POINT RETRIEVAL DEVICE, MUTUAL LOCATION DEVICE, THREE-DIMENSIONAL IMAGE MEASUREMENT DEVICE, CORRESPONDING POINT RETRIEVAL PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM WITH ITS PROGRAM RECORDED

摘要

PROBLEM TO BE SOLVED: To realize location point retrieval which can be suitably used even for an civil engineering field without using any special target.;SOLUTION: A location point retrieval device 5 which retrieves a location point between a plurality of redundantly photographed photographic images is provided with a mutual location element acquisition processing part 23 for acquiring the mutual location element of each photographic image necessary for searching epi-polar constraint conditions between photographic images, a location point candidate extraction processing part 21 for extracting a pixel region showing an object which is conspicuous in each photographic image based on color information in the photographic image data of each photographic image, an ellipse parameter calculation part 22a for calculating the ellipse parameter of an ellipse when the extracted pixel region is expressed by an ellipse based on the position information of pixels included in the extracted pixel region and a location point retrieval processing part 24 for deciding whether or not the pixel regions extracted in each photographic image have any corresponding relation based on the roughly estimated value of the acquired mutual location elements and the calculated ellipse parameter.;COPYRIGHT: (C)2007,JPO&INPIT