Frame correlation gating three-dimensional imaging method and imaging system based on mark frames

Abstract

A frame correlation gating three-dimensional imaging method based on mark frames comprises the following steps: collecting (2N + 1) * M frames of images for a target, 2N frames of images being information frames, one frame of image being a background frame, and M being the number of cycles; when M is equal to 1 and N is equal to 1, respectively calculating gray average values of the background frame image and the two information frame images; comparing the gray average values of the three frames of images, and searching the image corresponding to the minimum value; solving the difference between the gray average minimum value and the global minimum value, and if the difference is smaller than a global threshold value, defining the frame of image as a mark frame G; sequentially determininginformation frame A and B frames of images by utilizing the mark frame; solving the difference between the A-frame image and the G-frame image and the difference between the B-frame image and the G-frame image to remove background light noise; and performing three-dimensional reconstruction on the A and B frames of images to obtain a target three-dimensional image. The background frame is used asthe mark frame to classify the information frame, the gating imaging system can automatically identify the frame A and the frame B, online three-dimensional reconstruction work is carried out, the three-dimensional image of the target is acquired in real time, and the applicability is good.

Description

Technical field [0001] The invention relates to the technical field of three-dimensional imaging, in particular to a frame-related strobe three-dimensional imaging method and imaging system based on a marker frame. Background technique [0002] Range-gated 3D imaging is an active lighting 3D imaging technology, which can be widely used in long-distance night vision reconnaissance, urban anti-terrorism, and 3D surveying and mapping. The super-resolution 3D imaging in the range gating uses the echo broadening effect to construct a range energy envelope that satisfies a specific geometric shape, and obtains the 3D information of the target through the inversion of two images or multiple coded images, with good real-time performance and range resolution Features such as high rate and long range. However, the image used in the super-resolution 3D imaging method requires information classification and background filtering, which requires real-time background frame image and informatio...

AI Technical Summary

Problems solved by technology

The collected three frames of images have not been classified into information frames, and the target information in the two images cannot correspond. As a result, in the process of super-resolution 3D reconstruction, the distance energy envelope constructed by the echo broadening effect cannot act on the effective target, and the calculation error The target 3D information of

Therefore, accurate target 3D information cannot be obtained for online real-time super-resolution 3D imaging, and 3D reconstruction cannot be achieved.

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