Target azimuth estimation for automatic tracking in range-gated imaging

Yinan Cao; Xinwei Wang; Yan Zhou

doi:10.1117/12.999484

21 November 2012 Target azimuth estimation for automatic tracking in range-gated imaging

Yinan Cao, Xinwei Wang, Yan Zhou

Proceedings Volume 8558, Optoelectronic Imaging and Multimedia Technology II; 85581W (2012) https://doi.org/10.1117/12.999484
Event: Photonics Asia, 2012, Beijing, China

Abstract

Target tracking is of great importance in imaging system, which can be applied in surveillance, as well as salvage and rescue where 3D spatial coordinates are used to locate the target. Range-gated imaging system is capable of acquiring range information of targets. However, azimuth is also necessary to provide the spatial coordinates to achieve target tracking. This paper presents a target azimuth estimation method for range-gated imaging system, aiming at obtaining essential information for vision-based automatic tracking. Due to the noise and low contrast of range-gated image, median filter and histogram equalization are used. Then the Otsu method is performed to make the segmentation of target and background. After segmentation, morphologic transformation methods will be taken in order to delete false targets. With pixels of target extracted from the image, the centoid will be derived. Next the pinhole camera model is applied to work out the azimuth coordinate. Since the focus length of camera is needed in the formula, an NC (Numerical Control) zoom module is developed. In this module, a sliding potentiometer is connected to the focus motor in camera, which serves as a feedback of the focus. To read the focus length and control the focus motor, an MCU (with AD converter) is used. Once the target azimuth information is obtained, the pan-tilt control unit can track the target bit by bit automatically.

Citation Download Citation

Yinan Cao, Xinwei Wang, and Yan Zhou "Target azimuth estimation for automatic tracking in range-gated imaging", Proc. SPIE 8558, Optoelectronic Imaging and Multimedia Technology II, 85581W (21 November 2012); https://doi.org/10.1117/12.999484

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available