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Parallax error in video-image systems
- Source :
- Journal of Transportation Engineering. May-June, 2002, Vol. 128 Issue 3, p218, 3 p.
- Publication Year :
- 2002
-
Abstract
- Parallax error is a distance-related measurement error when the measurement has to rely on field of view, such as video-image systems. This paper provides a detailed investigation of the geometric elements associated with parallax error in video-image systems. A field-of-view calibration model is presented based on a study of various geometric elements, including camera height, camera location, view of image, and vehicle dimension. The study found that parallax error ranges between 10 and 50% based on normal camera setup. The model presented provides a better understanding of the parallax error; thus the accuracy of distance-related measurements could be improved when video-image systems are deployed. The proposed model has special application values at signalized intersections where video-image systems are deployed. One of the applications is to identify the range of possible blockage by a leading vehicle, which is one of the major causes of missed detections. Another application is to identify the conditions that result in vehicle occlusion, which is a source of false detections. CE Database keywords: Errors; Measurement; Imaging techniques; Transportation engineering.
Details
- ISSN :
- 0733947X
- Volume :
- 128
- Issue :
- 3
- Database :
- Gale General OneFile
- Journal :
- Journal of Transportation Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.86049238