Plane photo stitching correction ruler

Abstract

The invention particularly relates to a plane photo stitching correction ruler comprising main rulers and auxiliary rulers. The main rulers and the auxiliary rulers are provided with a plurality of grid marks which are concentric circles. A plurality of auxiliary rulers are arranged between every two main rulers. The auxiliary rulers are set in a row, and one main ruler is arranged at each of the two ends. The distance between adjacent grid marks is the same. The grid marks are concentric circles, and deformation caused by different distance between a steel box girder and a camera is corrected based on the sizes of the concentric circles in a photo, namely, the pixels of the photo are unified. Deformation caused by the shooting angle of the camera is judged and corrected according to the length from the intersection of the concentric circles and a cross mark line in the photo to the center of the circles, and the deformed plane photo is thus corrected. During steel box girder plane photo stitching, the photo of the correction ruler is used as a mark to ensure accurate and simple stitching.

Description

[0001] (1) Technical field [0002] The invention relates to a steel box girder, in particular to a plane photo splicing correction ruler. [0003] (2) Background technology [0004] With the increase of economic strength, in order to speed up the construction of bridges, steel box girders are widely used in the field of road bridges. The weight of a single piece is large, and the maximum weight of the steel box girder section of the main span reaches dozens of tons. The sections are produced in a professional box girder processing factory and transported to the bridge site for assembly and connection. It is important to ensure that the bolt holes of the patch plate are consistent with the bolt holes 10 of the steel box girder, and it is important to detect the two sections of box girders that are connected to each other. [0005] Due to the heavy weight of the steel box girder, if there is an error during splicing, the consequences of dismantling and correcting it will be ver...

AI Technical Summary

Problems solved by technology

[0006] However, in the process of collecting planar photos of steel box girders, the camera may be vertical or inclined, and the distance from the steel box girders is not the same, so the deformation of the planar photos is very likely to occur

[0007] Moreover, due to the large size of the steel box girder, it is often impossible to fully appear in the camera. It is necessary to divide the entire steel box girder into n parts and take pictures separately, and then remove the overlapping parts of the n pictures, and stitch the remaining parts into the required steel box girder. Plane photo of box girder

Because the shooting angle and shooting distance are difficult to be completely consistent, and the cropping standards of overlapping parts are difficult to judge, the difficulty of photo stitching is greatly increased. Even if a lot of energy and time are spent, it cannot be seamless

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