Construction method capable of measuring panoramic picture

Abstract

The invention relates to a construction method capable of measuring a panoramic picture, which comprises the following steps of: 1) performing cylindrical projection on horizontal view angle original pictures acquired by a stereoscopic camera in a 360-degree range; 2) extracting control points from cylindrical pictures after the cylindrical projection by adopting a scale-invariant feature transform (SIFT) algorithm, and then calculating relative postures of other pictures through the control points by taking one of the pictures as a basis; 3) splicing the cylindrical pictures after the cylindrical projection according to the relative postures of the other pictures to generate the panoramic picture; and 4) reversely projecting the panoramic picture to a plane, establishing a linkage relationship of the panoramic picture and the original pictures, then selecting any point on the panoramic picture to obtain pixel coordinates of the point on the original pictures through inverse computation, and finally measuring the coordinates, the distance and the slope gradient of the point according to calibrated stereoscopic camera parameters through a forward intersection principle. The construction method not only realizes the measurement of the panoramic picture, but also can actually reflect three-dimensional geographic information.

Description

Method for constructing measurable panoramic image Technical field The present invention relates to a method for constructing a panoramic image, in particular to a method for constructing a panoramic image through a stereo image and establishing a correlation between the panoramic image and the original stereo image. Background technique At present, the image-based rendering technology (Image-Based Rendering, IBR) is becoming a new virtual reality construction method due to its small amount of calculation, rich scene details, and real-time processing. Panoramic image is a technology based on IBR. The basic idea is to collect real images in various directions at a given viewpoint, and then project these real images onto the inner surface of a cylinder or a sphere for view stitching, and finally use Back-projection technology re-obtains scene images corresponding to various viewing angles. It can provide 360° viewing angle in the horizontal direction and ±90° viewing angle in t...

AI Technical Summary

Problems solved by technology

The panoramic image construction mentioned above only has the functions of browsing and displaying, and is not measurable. Users cannot obtain real geographic information from it, and cannot obtain information such as the position, height, orientation, and slope of any point in real time from the panoramic image.

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