Multi-spectrum calibration board for visible light stereoscopy and infrared stereoscopy and calibration device

Abstract

The invention discloses a multi-spectrum calibration board for visible light stereoscopy and infrared stereoscopy and a calibration device. A plurality of patterns of one or more types in arbitrary combinations are distributed on the calibration board; the patterns include patterns formed by intersection of N straight lines with vertexes, closed patterns formed by closing of M straight lines and curves and circular patterns or oval patterns, wherein N is greater than equal to 2, and M is greater than or equal to 1; and the calibration board and the patterns are made of tinfoil paper or black paper, and adjacent calibration board parts and patterns are made of different materials. The calibration device comprises the calibration board (1), a movable stretching support (2) and a rotary support (3), wherein the rotary support (3) is installed on the upper portion of the movable stretching support (2), and the calibration board (1) is connected to the rotary support (3). Through the scheme, production is simple, usage is convenient, and the calibration result is precise.

Description

technical field [0001] The invention belongs to the field of computer vision, in particular to a simple, practical and high-precision calibration device for an infrared camera and a visible light camera. Background technique [0002] In the application of computer vision, in order to be able to calculate the three-dimensional position and shape of the object based on the two-dimensional image information, and thus identify and reconstruct the object in the scene, it is necessary to correspond the points in the three-dimensional space with the points on the two-dimensional image stand up. This correspondence is determined by the geometric model of camera imaging, and the parameters of these models are called camera parameters. The process of computing these parameters is called camera calibration. Camera calibration is the foundation and premise of stereo vision. [0003] The calibration theory and method of visible light cameras are very mature. The calibration of infrare...

AI Technical Summary

Problems solved by technology

[0003] The calibration theory and method of visible light cameras are very mature. The calibration of infrared cameras is similar to that of visible light cameras. However, due to the immature imaging technology of infrared cameras before, infrared images have low contrast between the target and the background, blurred image edges, and low signal-to-noise ratio. Such shortcomings make it difficult to extract the calibration feature points during infrared camera calibration, and it is necessary to make a complicated calibration device. When the data is collected, multiple people are required to make the calibration board in different poses, which requires a lot of manpower and material resources

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