A method and system for measuring camera depth change based on Moiré fringes

Abstract

The present invention discloses a method for measuring depth change of a camera based on a moire fringe. The method comprises the following steps: acquiring a reference raster image; changing a depthof a camera, and collecting a raster image at this time; and performing beat frequency processing of the two raster images to obtain a synthesized moire fringe, and extracting frequency of a moire fringe image; and obtaining depth change of the camera according to the frequency information of the moire fringe image. A system comprises an image acquisition module, an image processing module and a depth calculation module. On the premise of ensuring a certain accuracy, the method and the system provided by the invention have the advantages of simple implementation, low uncertainty and real-timemeasurement; requirements for the light source and the measurement environment are relatively low, an experiment environment is easy to realize and adaptability is high; in the algorithm aspect, measurement efficiency is improved; and the method and the system for measuring depth change of a camera based on a moire fringe can be widely used in the field of image processing.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method and system for measuring camera depth changes based on Moiré fringes. Background technique [0002] The spatial pose of the camera includes six degrees of freedom in the X direction, Y direction, Z direction, pitch, yaw, and roll, and the depth change of the camera usually refers to the position change of the camera in the Z direction in the expression method of the spatial pose. In visual measurement, choosing different measurement strategies for different poses can improve the adaptability of the measurement system. In the current depth measurement method, the principle of binocular parallax is commonly used for depth measurement, but this method requires a complicated calibration process, the measurement accuracy varies with the depth, and the measurement range also has many limitations. In the monocular measurement method, more is to use the change of the spe...

AI Technical Summary

Problems solved by technology

In the current depth measurement method, the principle of binocular parallax is commonly used for depth measurement, but this method requires a complicated calibration process, and the measurement accuracy varies with the depth, and the measurement range also has many limitations.

In the monocular measurement method, more is to use the change of the specific image size to calculate the change of the camera depth. This method has low precision and also requires a complicated calibration process. At the same time, it has high environmental requirements and cannot meet the needs of different environments. precise measurement of

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