Calibration plate and a thermal infrared camera calibration method based on same

Abstract

The invention relates to a calibration plate and a thermal infrared camera calibration method based on the same. The calibration plate comprises a square substrate, wherein a checkerboard layer for visible light camera calibration is arranged on the substrate; the checkerboard layer is positioned on the front surface of the substrate; the checkerboard layer is an international chessboard pattern layer formed by black and white square arrays with the same size; a temperature-controllable circular heating piece for thermal infrared camera calibration is mounted on the front surface of each black square; the circular heating piece is connected with a heating circuit; the circular center of the circular heating piece is superposed with the center of the black square; the circular heating piece is positioned within the boundary of each black square. When the calibration plate is adopted for the thermal infrared camera calibration, the calibration method is simple and accurate; the calibration plate is convenient to manufacture, low in cost and convenient to popularize; the calibration plate and the thermal infrared camera calibration method based on the calibration plate can be directly applied to the field of calibration of infrared imaging instruments for weather study, aviation and surveying and mapping and the like.

Description

technical field [0001] The invention belongs to the technical field of camera calibration, and in particular relates to a calibration board and a thermal infrared camera calibration method based on the calibration board. Background technique [0002] At present, camera self-calibration technology and theoretical research are mainly concentrated in the visible light band. Due to the low resolution of the thermal infrared camera and the lack of detailed information in the image, the existing calibration method cannot obtain good calibration accuracy. The infrared camera receives the target image. Thermal infrared radiation cannot be calibrated with traditional calibration boards; while the existing infrared camera calibration targets mainly use circular steel balls and high-precision 3D attitude instruments, which are expensive, and require auxiliary heat sources during calibration, and the calibration procedure is complicated. Contents of the invention [0003] The object o...

AI Technical Summary

Problems solved by technology

[0002] At present, camera self-calibration technology and theoretical research are mainly concentrated in the visible light band. Due to the low resolution of the thermal infrared camera and the lack of detailed information in the image, the existing calibration method cannot obtain good calibration accuracy. The infrared camera receives the target image. Thermal infrared radiation makes it impossible to use traditional calibration boards for calibration; while the existing infrared camera calibration targets mainly use round steel balls and high-precision 3D attitude instruments, which are expensive, and require auxiliary heat sources during calibration, and the calibration procedures are more complicated

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