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Method of detecting single moving target under complex background

A moving target and complex background technology, applied in the field of digital image processing, can solve problems such as large moving area, misjudging noise points as moving targets, and difficult threshold selection.

Inactive Publication Date: 2008-05-14
BEIJING UNIV OF TECH
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Problems solved by technology

[0005] The traditional instantaneous difference algorithm has certain limitations in application. If the noise in the image is serious, the probability of errors in extracting the motion area only through the selection of the threshold will be relatively high, and the selection of the threshold is not easy. In this way, it is easy to misjudge the noise point as a moving target

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  • Method of detecting single moving target under complex background
  • Method of detecting single moving target under complex background

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Embodiment Construction

[0030] The present invention is realized on a DSP development board, the core DSP of this development board is TMS320C6416 of TI Company, it can be connected with an external camera to collect images, and also has a VGA interface, which can be connected with an external monitor to display images. The schematic diagram of the whole device is shown in Figure 2:

[0031] The realization process of the present invention can be divided into several steps:

[0032] The first step: the core DSP TMS320C6416 controls the camera, collects images, and stores the collected image data on the external RAM of the DSP.

[0033] The second step: implement the algorithm of target detection and tracking on TMS320C6416, and optimize the assembly code to improve code efficiency.

[0034] The third step: directly display the image collected by the camera on the display 1, and display the final binarized image on the display 2, so that the original image can be compared with the image of the detect...

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Abstract

A measurement method for a single moving target under a complex background belongs to the field of digital image processing. Firstly, edge extracting is conducted with a laplace operator for a k frame image of fk(x, y) and a k-1 frame image of fk-1(x, y) collected by a camera; secondly, difference calculus is conducted for images of two frames whose edge is extracted, and a difference image of D (x, y) is obtained; thirdly, average filtering and binary processing is conducted for the difference image of D (x, y), fourthly, the image which is processed of binary is judged, i.e. when the difference of a pixel in the difference image is more than the set threshold value, the pixel is confirmed as a target pixel; otherwise, the pixel is a static background pixel. The invention is capable of detecting the moving target in large noise well and has a wide application prospect in the fields such as monitoring and intelligent traffic.

Description

technical field [0001] The invention belongs to the field of digital image processing. Background technique [0002] The new generation of intelligent visual surveillance technology is now widely used in aerospace, military, agriculture, industry, etc. It is an interdisciplinary comprehensive problem and a very challenging frontier topic. The important difference between it and the traditional monitoring technology is that it tries to give the monitoring system the ability to observe and analyze the content of the scene, so that it can automatically analyze the image sequence captured by the camera without human intervention. The target is located, identified and tracked, and on this basis, the behavior of the target is analyzed and judged, so that the daily management can be completed and the abnormal situation can be responded in time. [0003] In the entire visual surveillance system, moving target detection and tracking are at the bottom, which is the basis for various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18G06T7/20
Inventor 张延华陈春朋胡启梁
Owner BEIJING UNIV OF TECH
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