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Method for detecting dim small moving target under downward-looking complicated background

A moving target and complex background technology, which is applied in the field of downward-looking complex background weak and small moving target detection

Active Publication Date: 2014-04-02
中国航天科工集团第二研究院二〇七所
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to solve the problem of detecting and identifying infrared weak and small moving targets in the background of complex ground objects in the long distance and in the background of ground objects

Method used

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  • Method for detecting dim small moving target under downward-looking complicated background
  • Method for detecting dim small moving target under downward-looking complicated background
  • Method for detecting dim small moving target under downward-looking complicated background

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Embodiment

[0045] This embodiment provides a method for detecting weak and small moving objects in a complex background looking down, which can be decomposed into several processing stages. It mainly includes: the global motion estimation and compensation step in the design of image alignment; the background modeling step in the design of background estimation; the processing steps based on Hessian matrix in the edge filtering step; the Haralick model in the design of image segmentation The surface fitting and segmentation steps of the multi-frame information processing section respectively introduces the multi-frame association steps. Such as figure 1 and figure 2 As shown, the method includes the following three stages:

[0046] The first stage: background estimation based on background motion alignment and Gaussian modeling method

[0047] Specifically include:

[0048] Step S1: Align the image sequence of the background motion;

[0049] Step S2: processing the aligned image s...

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Abstract

The invention relates to the technical field of application of optoelectronic products and particularly relates to a method for detecting a dim small moving target under a downward-looking complicated background. In order to solve the problem of detection and reorganization of the infrared dim small moving target under a complicated ground feature background under a long-distance ground feature background, the method takes the problem of real-time performance into full account, firstly images are aligned, a method of comprehensively estimating time domain and space domain is used for the complicated background with ground features to accurately estimate a static background, difference is performed between the static background and the current image to obtain an image with the background seriously inhibited, then an edge inhibition method is used to eliminate the strong edge in the difference image, the target is divided by using a small facial model fitting process according to the Gaussian-like distribution of a small target gray level, and finally target marking and feather extracting are conducted, the interference of random noise is eliminated through multiframe relevance to finally extract the correct target. The method can accurately detect the dim small moving target.

Description

technical field [0001] The invention relates to the technical field of optoelectronic product applications, in particular to a method for detecting weak and small moving objects in complex backgrounds looking down. Background technique [0002] Small target detection technology is actually a common technology widely used in military and civilian fields. The so-called weak target refers to the situation that the target occupies a small number of pixels on the detector plane and has a low signal-to-noise ratio. According to the different properties of the weak and small targets, the weak and small targets can be divided into two categories, one is the target with low contrast, that is, the target with weak gray scale, and the other is the target with few pixels, that is, the small target. Aiming at the infrared system, the concept of small target has been proposed. Scholars at home and abroad have made a lot of achievements after more than ten years of in-depth research on th...

Claims

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Application Information

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IPC IPC(8): G06T7/20G06T7/00
Inventor 刘峰覃奋朱振福王鹏飞刘忠领
Owner 中国航天科工集团第二研究院二〇七所
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