Method for adjusting tilt angles of auxiliary cameras of aerial camera

Abstract

The invention relates to the technical field of aerial photogrammetry, in particular to a method for adjusting tilt angles of auxiliary cameras of an aerial camera. The method comprises the steps as follows: focal distances of target montaged images are determined, and at the same time, the photograph sizes and the pixel sizes of to-be-adjusted tilting auxiliary cameras are determined; a plurality of groups of analog auxiliary images are obtained through analog computation, and each group of the analog auxiliary images are montaged, so that montaged analog images are formed; under the condition that the focal distances of the target montaged images are determined; the photograph sizes, the overlapping degrees and the edge resolutions of the images of all the montaged analog images are computed; the tilt angles of the to-be-adjusted tilting auxiliary cameras corresponding to the montaged analog images meeting constraint conditions and corresponding to the photograph sizes, the overlapping degrees and the edge resolutions of the images are taken as target adjusting angles; and installation tilt angles of four to-be-adjusted tilting auxiliary cameras are adjusted according to the target adjusting angles correspondingly. According to the method, after the tilting auxiliary cameras are adjusted to the target adjusting angles, the overlapping degrees of the obtained montaged analog images meet the constraint conditions of the overlapping degrees, and the photograph sizes of the montaged analog images are larger at the same time.

Description

technical field [0001] The invention relates to the technical field of aerial photogrammetry, in particular to a method for adjusting the inclination angle of a sub-camera of an aerial photographic instrument. Background technique [0002] Aerial camera is an instrument that is mounted on an aircraft platform to take pictures of ground targets and obtain digital images. [0003] In order to obtain larger-format photographic images, the aerial camera in the related art generally includes four tilting sub-cameras, and the four tilting sub-cameras usually have the same image frame size and pixel size, and the four tilting sub-cameras are relatively There is a certain tilt angle, and the four tilt sub-cameras are connected in turn to form a square, and the extension lines of the photography centers of the four tilt sub-cameras intersect at one point, and the intersection point of the extension lines of the photography centers of the four tilt sub-cameras and the four The line c...

AI Technical Summary

Problems solved by technology

In related technologies, on the premise of determining the frame size, focal length and pixel size of the tilted sub-camera, the tilt angle of the sub-camera relative to the aircraft platform is determined according to the relationship between the frame size of the simulated stitched images and the degree of overlap, but only After the installation tilt angle of the sub-camera is determined according to the relationship between the image width and the degree of overlap, the resolution of the simulated mosaic image formed by stitching the simulated sub-images captured by the sub-camera is relatively low, which affects the observation accuracy of the image point

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