A Fast and Accurate Matching Method for Connection Points of Large-scale Multi-view Oblique Images
A technology of oblique image and accurate matching, applied in the field of surveying and mapping science, can solve the problems of insufficient utilization of multi-view image information, low matching efficiency of connection points, and low matching quality, etc., to avoid the problem of non-convergence of iterations, improve efficiency, and ensure accuracy. Effect
Active Publication Date: 2022-04-15
CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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[0010] The purpose of the present invention is to provide a method for fast and accurate matching of connection points of large-scale multi-view oblique images, which mainly solves the problem of low matching efficiency of connection points, low matching quality and utilization of multi-view image information in automatic aerial triangulation of multi-view oblique images. Insufficient, empty three layers and other problems
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[0060] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the technical solutions in the embodiments of the present invention will be described completely and clearly. Obviously, the introduced embodiments are only part of the embodiments of the present invention. The relative arrangement of components, numerical values, etc. set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
[0061] like figure 1 As shown in , a fast and accurate matching method for connection points of large-scale multi-view oblique images includes the following steps:
[0062] Step 1. Refinement of the external azimuth angle elements of the down-view image:
[0063] Select the downward-looking images in a certain range (such as 4 routes, 10 images for each route) for free network adjustment processing, and use the geometric constraints of the intersecting ray pairs with...
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The invention discloses a fast and accurate matching method for connection points of large-scale multi-view oblique images, which includes calculating the placement angle error of the downward-looking camera by using the downward-looking image in a small-scale local area, and correcting the external azimuth angle elements of the downward-looking image; combining and utilizing the pyramid image Matching, block extraction of feature points, relaxation iterative matching and other strategies are used to match the connection points of the downward-looking image, and through the block adjustment, the accurate external orientation elements of the downward-looking image and the object space coordinates of the connection points are obtained; on this basis, Make full use of the spatial geometric constraint relationship between the downward-looking image and the squint image to realize the point-to-point matching of the connection point of the downward-looking image to the squint image; use multi-view object matching to refine the image point coordinates of the connection point to realize the connection of oblique images Fast exact matching of points. The present invention makes full use of the geometric constraints between the downward-looking image and the squint image, and only extracts feature points from the downward-looking image for matching, effectively ensuring the speed and quality of matching connection points of large-scale oblique images.
Description
technical field [0001] The invention belongs to the field of surveying and mapping science and technology, and relates to a fast and accurate matching method for connection points of large-scale multi-view oblique images. This method is suitable for fast automatic aerial triangulation of large-scale multi-view oblique images, which is conducive to improving the matching speed, accuracy and overlap of connection points in automatic aerial triangulation of multi-view oblique images, and provides more information for the calculation of block adjustment of oblique images. Excellent image point observation data. Background technique [0002] Multi-view aerial photography has changed the operation mode of traditional aerial photography, which only shoots vertically. It can obtain multi-view images from downward and different oblique directions at the same time, and obtain richer multi-view image information. It has been used in large-scale mapping, cadastral surveying, Widely use...
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IPC IPC(8): G06T7/73
CPCG06T7/73
Inventor 明洋杨淑芬常青曾聪王刊生张霄郑亮
Owner CCCC SECOND HIGHWAY CONSULTANTS CO LTD