Digital image processing (2nd ed.)
Digital image processing (2nd ed.)
Elementary Numerical Analysis: An Algorithmic Approach
Elementary Numerical Analysis: An Algorithmic Approach
Digital Image Processing: PIKS Scientific Inside
Digital Image Processing: PIKS Scientific Inside
Multi-modal tracking of people using laser scanners and video camera
Image and Vision Computing
A precise inspection technique for wafer pre-sawing lines using Affine transformation
International Journal of Computer Applications in Technology
Surface roughness vision measurement in different ambient light conditions
International Journal of Computer Applications in Technology
Vision-based 3D surface motion capture for the DIET breast cancer screening system
International Journal of Computer Applications in Technology
Honeycomb model based skin colour detector for face detection
International Journal of Computer Applications in Technology
Moving target tracking and measurement with a binocular vision system
International Journal of Computer Applications in Technology
Synchronisation of vision-based sensor networks with variable frame rates
International Journal of Computer Applications in Technology
Partially occluded object recognition
International Journal of Computer Applications in Technology
International Journal of Computer Applications in Technology
Inspection of surface defects in copper strip using multivariate statistical approach and SVM
International Journal of Computer Applications in Technology
A multiple camera coordination method based on genetic programming and material character
International Journal of Computer Applications in Technology
A fast approach for person detection and tracking
International Journal of Computer Applications in Technology
Mobile robot 3D map building and path planning based on multi-sensor data fusion
International Journal of Computer Applications in Technology
Functional neuroimaging of circadian fatigue
International Journal of Computer Applications in Technology
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This paper presents a vision system to measure the wear of the railroad wheels, developed for the Portuguese railway company, CP - Comboios Portugal. The developed system is based on image-processing techniques to measure automatically the railroad wheels. The wheel's profile is acquired by the illumination of the wheel through a secant horizontal light plane. The profile's image is processed by identifying the line of the greatest light gradient. The gradient's profile is then converted to the wheel's radial profile by means of a coordinate transformation model, which transforms the image plane into the wheel's radial plane. A 1 : 1 scale static prototype is built and the calibration and testing procedures are shown. Experimental results are presented and discussed. Future improvements on the developed prototype will allow dynamic measurements at slow speeds 5 km/h, as the present developed image system was designed to eliminate distortions owing to the wheel's movement.