Weak point target precisely positioning method and system based on space-time oversampling and scanning

Abstract

The invention provides a weak point target precisely positioning method and system based on space-time oversampling and scanning. The method comprises the steps of structuring M linear array detectors; performing scanning to obtain M groups of images, performing non-uniformity correction on the images obtained through scanning, and according to time and space sampling periods, arranging the M groups of images in a mosaic mode into a n image F', and removing edges of the image F'; eliminating random noise in the image F'; performing threshold filtering on the denoised image to obtain a binarized image F1; searching for weak point target regions in the image F1 through a connected region method; searching for the corresponding weak point target regions in the image F, and determining the positions of mass centers of weak point targets through a first-step-interval mass center extracting method to achieve precise positioning of the corresponding weak point targets in the image F'. The weak point target precisely positioning method and system based on space-time oversampling and scanning overcomes the problems of long sample data processing time and complex information processing processes in existing oversampling technology and can obtain high-precision target point location without changing the optical aperture and the focal length of an existing optical system.

Description

technical field [0001] The present invention relates to the technical field of weak and small target detection, and more specifically, to a method and system for precise positioning of weak and small point targets based on space-time oversampling scanning. Background technique [0002] In recent years, the problem of infrared weak point target detection has been a research hotspot in the field of infrared images. When using infrared band scanning to detect targets, due to factors such as long imaging distance and atmospheric attenuation, the targets in the detection image are point-shaped, so that the number of imaging pixels is only 1-2, and the signal-to-noise ratio of the target in the image is very low. In order to improve the detection probability and positioning accuracy of the target in the detection image, the traditional method is to increase the aperture and focal length of the optical system, and increase the number of detector pixels, thereby improving the signal...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method and system for precise positioning of weak point targets based on space-time oversampling scanning, which overcomes the long processing time of sampling data and the information processing flow of the existing oversampling technology. Complex problems, and can obtain high-precision target point positioning without changing the optical aperture and focal length of the existing optical system

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