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Small dim target energy accumulation enhancement method capable of combining with time-space domain

A technology of weak and small targets and energy accumulation, which is applied in the field of energy accumulation and enhancement of weak and small targets combined with time and space domain, can solve problems such as unfavorable target detection and enhanced noise, and achieve the effect of improving signal-to-noise ratio, suppressing Gaussian noise and enhancing effect.

Inactive Publication Date: 2017-05-31
YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Problems solved by technology

The single-frame target enhancement method often enhances the noise while enhancing the target, and even the enhancement of the noise is more obvious, but it will generate a large number of false alarms, which is not conducive to the subsequent detection of the target.

Method used

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  • Small dim target energy accumulation enhancement method capable of combining with time-space domain
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  • Small dim target energy accumulation enhancement method capable of combining with time-space domain

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Embodiment Construction

[0043]Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0044] Since most of the weak and small targets in the image sequence have certain motion, in order to better accumulate their energy in the time domain, the motion of the target needs to be taken into consideration. Obviously, the single-frame enhancement method does not take the motion characteristics of the target into consideration, which will inevitably affect the energy enhancement effect of weakly moving targets. The movement of the target in adjacent frames often manifests as lateral movement, vertical movement and diagonal movement. Regardless of the direction of motion of the targ...

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Abstract

The invention discloses a small dim target energy accumulation enhancement method capable of combining with a time-space domain. The method comprises the following steps that: firstly, adopting an anisotropy differential algorithm to carry out background suppression on an image to be processed to reduce the interference of background clutters; then, combining with the multi-frame movement characteristic of a small dim target in a neighborhood, adopting a target energy enhancement method of high order accumulation to obtain an energy maximum value in the neighborhood of continuous multi-frame images to realize the effective accumulation of movement target energy so as to achieve a purpose of enhancement; and finally, adopting a constant false alarm hypothesis test method to carry out segmentation extraction on the enhanced image to make the target prominent. Compared with a traditional singe-frame enhancement method, the method disclosed by the invention is characterized in that the dim target energy is accumulated in the movement neighborhood of the target according to the movement characteristics of the target, an enhancement effect better than the enhancement effect of the singe-frame enhancement method is realized, Gaussian noise in the image is effectively inhibited, and the signal-to-noise ratio of the image is obviously improved.

Description

technical field [0001] The invention relates to a weak and small target enhancement method, which is characterized in that the weak and small target energy accumulation enhancement method combined with the space-time domain is used for image processing, computer vision and target detection and positioning. The invention belongs to the technical field of target detection in a photoelectric capturing and tracking system. Background technique [0002] The image obtained by the imaging system, due to the long imaging distance and the interference of various background clutter, the energy intensity of the target is very weak. Even after suppressing the background processing, it is still difficult to effectively segment and extract the weak target in the infrared image. . [0003] At present, many scholars have done a lot of research work on the energy enhancement of weak and small targets. The single-frame target enhancement method often enhances the noise while enhancing the t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/215
CPCG06T2207/10016
Inventor 张涛樊香所郭红伟黄善杰
Owner YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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