Method for detecting weak and small target based on space-time partial differential equation

A partial differential equation, weak and small target technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of weak intensity, small geometric size of weak and small targets, difficult to detect, etc.

Active Publication Date: 2015-05-13
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The purpose of the present invention is to provide a weak target detection method based on space-time partial differential equations, which can enhance the weak target, and solve the problem that the weak target is difficult to be detected due to its small geometric size, weak intensity, and easy to be submerged by noise. The problem

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  • Method for detecting weak and small target based on space-time partial differential equation
  • Method for detecting weak and small target based on space-time partial differential equation
  • Method for detecting weak and small target based on space-time partial differential equation

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[0052] Below in conjunction with accompanying drawing and example the present invention is described in further detail.

[0053] like figure 1 As shown, the present invention is a small target detection method based on space-time partial differential equations. The method mainly predicts and suppresses background clutter by constructing a space-time partial differential equation model, and then detects small infrared targets. Specifically include the following steps:

[0054] Step 1: read image sequence I=(I 1 , I 2 , I 3 ...I n-1 , I n , I n+1 ...I N-2 , I N-1 , I N ), wherein, n is the frame number of the image sequence, and N is the total frame number of the image sequence. In order to predict better, the present invention combines each continuous three-frame image as a three-dimensional image, such as figure 2 shown. The coordinates of its pixel points are (x, y, z) (in order to distinguish from the iteration time t, the variable on the time dimension is repre...

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Abstract

The invention discloses a method for detecting a weak and small target based on a space-time partial differential equation. The method comprises the steps of (1) reading adjacent three frame images with image sequence to be processed; (2) initializing parameters w and calculating the time-space gradients of the images by the formula in the specification; (3) predicating the backgrounds of the images through the space-time partial differential equation; (4) differentiating the current frame image and the background predicating result to obtain the detection result of the weak and small target. According to the method, the background of a far infrared image is predicated through the space-time partial differential equation, and thus the weak and small target can be detected through the algorithm; the method provides technical support to image guidance, safety monitoring, and space monitoring, and is relatively high in practical value.

Description

technical field [0001] The invention relates to a weak and small target detection method based on space-time partial differential equations, and belongs to the technical fields of computer vision and aerospace. Background technique [0002] At present, weak and small target detection is a key issue that should be studied in imaging guidance, security monitoring, and space monitoring technology. With the development of modern technology, people hope that the target can be detected with high reliability when the distance between the target and the imaging sensor is very long, that is, the so-called weak target stage. However, due to the influence of factors such as natural meteorological conditions (weather, wind speed, wind direction, air temperature, solar radiation, etc.), target background environment (sky, ground, sea surface) and target structure, when the target is far away, its size is usually relatively large. Small, relatively low strength. The target geometric siz...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/001G06T2207/10048G06T2207/20182
Inventor 邓丽珍朱虎周亮程钊李勐白晓东谢世鹏
Owner NANJING UNIV OF POSTS & TELECOMM
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