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PTZ Camera-Based Displacement Sensor System with Perspective Distortion Correction Unit for Early Detection of Building Destruction

View Article: PubMed Central - PubMed

ABSTRACT

This paper presents a pan-tilt-zoom (PTZ) camera-based displacement measurement system, specially based on the perspective distortion correction technique for the early detection of building destruction. The proposed PTZ-based vision system rotates the camera to monitor the specific targets from various distances and controls the zoom level of the lens for a constant field of view (FOV). The proposed approach adopts perspective distortion correction to expand the measurable range in monitoring the displacement of the target structure. The implemented system successfully obtains the displacement information in structures, which is not easily accessible on the remote site. We manually measured the displacement acquired from markers which is attached on a sample of structures covering a wide geographic region. Our approach using a PTZ-based camera reduces the perspective distortion, so that the improved system could overcome limitations of previous works related to displacement measurement. Evaluation results show that a PTZ-based displacement sensor system with the proposed distortion correction unit is possibly a cost effective and easy-to-install solution for commercialization.

No MeSH data available.


Conceptualization of a PTZ camera-based displacement measurement system.
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sensors-17-00430-f001: Conceptualization of a PTZ camera-based displacement measurement system.

Mentions: Figure 1 shows the overall architecture of a PTZ camera-based displacement measurement system (PTZ system). As shown, a PTZ system is comprised of an internet protocol (IP) camera, various markers, and a computer to process the video images. To improve the installation process, we suggest using an IP camera with PTZ functionality, which allows the video from the camera to be fed wirelessly to a PC. Once the video is received, displacement can be measured by applying an algorithm to process the video images.


PTZ Camera-Based Displacement Sensor System with Perspective Distortion Correction Unit for Early Detection of Building Destruction
Conceptualization of a PTZ camera-based displacement measurement system.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5375716&req=5

sensors-17-00430-f001: Conceptualization of a PTZ camera-based displacement measurement system.
Mentions: Figure 1 shows the overall architecture of a PTZ camera-based displacement measurement system (PTZ system). As shown, a PTZ system is comprised of an internet protocol (IP) camera, various markers, and a computer to process the video images. To improve the installation process, we suggest using an IP camera with PTZ functionality, which allows the video from the camera to be fed wirelessly to a PC. Once the video is received, displacement can be measured by applying an algorithm to process the video images.

View Article: PubMed Central - PubMed

ABSTRACT

This paper presents a pan-tilt-zoom (PTZ) camera-based displacement measurement system, specially based on the perspective distortion correction technique for the early detection of building destruction. The proposed PTZ-based vision system rotates the camera to monitor the specific targets from various distances and controls the zoom level of the lens for a constant field of view (FOV). The proposed approach adopts perspective distortion correction to expand the measurable range in monitoring the displacement of the target structure. The implemented system successfully obtains the displacement information in structures, which is not easily accessible on the remote site. We manually measured the displacement acquired from markers which is attached on a sample of structures covering a wide geographic region. Our approach using a PTZ-based camera reduces the perspective distortion, so that the improved system could overcome limitations of previous works related to displacement measurement. Evaluation results show that a PTZ-based displacement sensor system with the proposed distortion correction unit is possibly a cost effective and easy-to-install solution for commercialization.

No MeSH data available.