Calibration method for multi-projection splicing

Abstract

The invention discloses a calibration method for multi-projection splicing. The method is characterized by comprising the steps as follows: two horizontal calibration lines and two perpendicular calibration lines are generated by a system and added to split pictures of a source picture; at the same time, the system generates an initial rectangular frame picture for each split picture of the source picture; four peaks of each initial rectangular frame picture are adjusted by limiting one direction of the horizontal position direction and the perpendicular position direction, so that an initial calibration window corresponding to the initial rectangular frame picture becomes a final rectangular frame picture; horizontally spicing is performed, and projection split pictures are moved perpendicularly and horizontally, so that horizontal calibration lines of a projection are aligned to each other vertically and respectively, and perpendicular calibration lines of splicing sides of the projection split pictures are overlapped; and when vertically splicing is performed, the projection split pictures are moved horizontally and perpendicularly, so that perpendicular calibration lines of the projection are aligned to each other horizontally and respectively, and at the same time, horizontal calibration lines of splicing sides of the projection split pictures are overlapped. Compared with the prior art, the method has the advantage that the calibration process and the calibration speed are simplified.

Description

technical field [0001] The invention relates to a calibration method for multi-projection splicing, in particular to geometric transformation of images, and belongs to the field of digital image processing. Background technique [0002] In large conference halls, studios and other places, multiple projectors are often used to splice and display large-screen images. Each projector projects and displays part of the picture, and these pictures are combined into a large-screen picture. In order to make the picture complete and homogeneous, the so-called seamless splicing between the projection pictures is often carried out by edge fusion, that is, the edges of two adjacent pictures retain a part of the overlapping area, which is called the fusion zone. The fusion band is processed by image feathering technology to fuse two adjacent images. Since the projected picture is the picture displayed by the projector on the large screen through optical projection, its size and shape de...

AI Technical Summary

Problems solved by technology

Due to the magnification of the projection lens, a small error in the position of the projector can cause a large deformation of the picture, making it difficult to meet the requirements of image stitching

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