Equal scaling optical correcting method for inclined picture image

Abstract

The invention relates to an equal scaling optical correcting method for an inclined picture image, belonging to the fields of aviation, aviation image measurement, aviation reconnaissance and the like. The invention aims at providing an equal scaling optical correcting method for a large inclined picture image, which can be used for outputting and correcting an image synchronously and performing equal scaling (camera focus / flight height) and unequal scaling correction. When an aerial camera is inclined to take a picture, if a target on the ground vertical to a paper cover is imaged in the camera, the image length of a perigee is larger than that of an apogee; an imaging film is placed in a way that the film is arranged with an angle with the vertical surface of an imaging main optical shaft, and a correcting lens is arranged between the film and the imaging paper. The equal scaling optical correcting method for the inclined picture image has the advantages of convenience in operation, short correcting time, no factitious deformation and the like.

Description

technical field [0001] The invention belongs to the fields of aviation, aerospace image measurement, aerial reconnaissance and the like. Background technique [0002] In aerial survey or aerial reconnaissance, in order to obtain more images of ground targets, oblique photography or three side-by-side photography with left oblique, vertical and right oblique is usually used. The scales of perigee and apogee are different when shooting obliquely. A rectangular target will form a trapezoid after imaging. Multiple oblique images will be mosaiced together to form a fan. Three side-by-side images will form a bread shape if they are mosaiced on a plane. Multiples of the same target will be formed at the apogee. Cannot be mapped. The image needs to be corrected into a vertical image and then mosaiced. [0003] Most of the current image correction uses digital methods for computer correction. For computer correction, the process of film correction is very complicated: first, the f...

AI Technical Summary

Problems solved by technology

In the whole process, the image information will be lost many times. When the film image is digitally converted, a certain amount of shadow texture will be lost. After the image is corrected, a certain amount of shadow texture will be lost, and a certain amount of shadow texture will be lost when the image is output into a photo.

It affects the resolution of the image; when digital image is corrected, because it is an artificial image deformation, the degree of image deformation is related to the level of the programmer, and a certain amount of artificial deformation will occur

and it takes a long time to do this

At present, there is no good optical correction method to correct, especially for images with large tilt, it is difficult to achieve image scale correction

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