A building texture extraction method based on oblique aerial images

Abstract

The invention discloses a building texture extraction method based on oblique photogrammetry. The method comprises the following steps of acquiring a vertical image and an oblique image of a building;screening out an optimal top texture source of the building from the vertical image of the building according to a dual-constraint model, wherein the dual-constraint model comprises whether the texture region is in the center of the vertical image and whether the texture region is complete; screening out the optimum texture source of the vertical surface of the building from the inclined image ofthe building according to the multi-combination constraint model, wherein the multi-combination constraint model comprises the visibility of the facade texture surface on the inclined image and whether the inclined image of the building completely comprises the facade texture surface and whether the projection area of the facade texture surface on the inclined image is maximum or not; and detecting and extracting the texture contour line of the building from the screened optimal texture source of the top of the building and the optimal texture source of the building facade. According to the method, the optimal texture image source can be accurately positioned, and the accurate position of the building texture information can be accurately positioned and extracted.

Description

technical field [0001] The invention relates to the field of remote sensing. More specifically, the present invention relates to a building texture extraction method based on oblique aerial images. Background technique [0002] Oblique photogrammetry is a new type of photogrammetry technology that uses multi-angle tilted cameras to obtain ground feature information. This technology uses multiple cameras with different tilt angles to simultaneously collect ground information, and the ground feature information acquired by multi-angle acquisition is more perfect. Change the shortcomings of traditional photogrammetry to obtain regional information vertically. In my country, UAV flight platforms are generally used to carry oblique photography platforms to obtain ground object information in all directions. Most tilting photography platforms use a five-lens tilting camera, which is composed of a vertical lens and four tilting lenses. In the five-lens tilting photography platfo...

AI Technical Summary

Problems solved by technology

[0004] The oblique camera consists of five lenses, and each shot will acquire five images at the same time, and there is overlap between different camera stations and headings, causing the texture of the same building to show different results in multiple oblique images, for example, It is prone to problems such as too small texture information, incomplete texture information, and occlusion of ground objects, and oblique images containing such texture problems cannot be used as image sources for obtaining textures

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