Average grey-based method for extracting effective information region of range gating image

Abstract

The invention discloses an average grey-based method for extracting an effective information region of a range gating image. The method comprises the following steps: calculating an initial threshold by utilizing priori knowledge; extracting an effective information region of an original image by utilizing the initial threshold; calculating an average grey value of an edge part of the extracted information region according to the edge part; acquiring a largest eight-connected region of an image background according to a cut result of the initial threshold, wherein the average grey value of the largest eight-connected region is approximate to that of a background region, and the average value of the largest eight-connected region is used as an average grey value of the background region; and comparing the average value of a strip region at the edge of the effective information region with the average grey value of the background region, measuring whether a final cut result cuts information and noise optimally or not by the difference of the average value of the strip region at the edge of the effective information region and the average value of the background region, adjusting the value of the initial threshold if the difference is not in an acceptable range, and performing iterative operation on the adjusted value used as a new initial threshold until the difference is in an acceptable range.

Description

technical field [0001] The invention relates to the technical field of computer vision, and relates to a method for extracting effective information areas of distance-gated images based on average grayscale. Background technique [0002] Distance-gated laser imaging technology has become a research hotspot at home and abroad, mainly because the technology can work under no-light conditions at night, has a long working distance, and has the ability to truly break through fog, rain, snow, etc. Use in low environment. It has a wide range of application prospects in the fields of long-distance night vision, underwater target detection and three-dimensional imaging. [0003] By controlling the delay between the gated pulse and the laser pulse, the range-gated imaging system can image specific spatial slices. According to the information characteristics of the sliced ​​image, the image can be divided into effective information area and noise area. The effective information area...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing technology cannot accurately extract the effective information area caused by the characteristics of the echo broadening effect image, the present invention proposes a method for extracting the effective information area of ​​the range-gated image based on the average gray level to achieve the echo broadening effect and The purpose of accurately extracting effective information area under the influence of system noise

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