Method and system for measuring depth change of camera based on moire fringe

A technology of moiré fringe and depth change, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve problems such as inability to meet accurate measurement, measurement accuracy changes, and measurement range limitations, and achieve easy implementation of the experimental environment and low hardware requirements , the effect of low uncertainty

Active Publication Date: 2018-01-16
SHENZHEN UNIV
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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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  • Method and system for measuring depth change of camera based on moire fringe
  • Method and system for measuring depth change of camera based on moire fringe
  • Method and system for measuring depth change of camera based on moire fringe

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Embodiment Construction

[0046] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0047] refer to figure 1 , is an algorithm flow chart of the first embodiment of the present invention. The invention provides a method for measuring the depth change of a camera based on Moiré fringes, which comprises the following steps:

[0048] Acquire the reference raster image;

[0049] Change the depth of the camera and collect the raster image at this time;

[0050] performing beat frequency processing on the two grating images to obtain synthesized moiré fringes, and extracting the frequency of the moiré fringe images;

[0051] According to the frequency information of the moire fringe image, the depth variation of the camera is further obtained.

[0052] As an improvement of the technical solution, the method further includes performing Fourier transform on the moiré image to obtain the frequ...

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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...

Claims

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Application Information

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IPC IPC(8): G01B11/22G01B11/02
Inventor 田劲东李聪田勇李东
Owner SHENZHEN UNIV
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