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Adaptive Hough Transform Circle Detection Application in Developed 2D Coordinate Measuring System

Zięba Przemysław, Gąska Adam, Harmatys Wiktor, Krawczyk Marcin

Advances in Science and Technology. Research Journal

2023

Vol. 17, no 6

185--191

This paper describes a cheap, portable coordinate system for measuring circular geometries. The developed software can measure diameters, circle center coordinates, and distances between them. The circle detector uses the Adaptive Hough Transform implemented in the OpenCV library. For image rectification, the system uses reference circle positions on the plane parallel to the plane of the measured ones. Pixel size is determined by the distances between the reference circle positions on the same plane. The mean measurement value from a series of photos was found efficient estimation of accurate value, significantly improving overall system accuracy.

An effective programming by demonstration method for SMEs’ industrial robots

Eissa Aly M., Atia Mostafa R., Roman Magdy R.

Journal of Machine Engineering

2020

Vol. 20, No. 4

86--98

Traditional programming methods often require expertise and significant time investment, which does not conform with Small and Medium size Enterprises (SMEs) nature in which High-Mix, Low-Volume (HMLV) orders are usually encountered. In this research, a Programming by Demonstration (PbD) method which aims to reduce the programming time and complexity while keeping a suitable level of execution accuracy is proposed. For this purpose, a special teaching tool is designed and manufactured. The tool has 5-spherical passive markers to indicate the position and orientation along the desired 3D path. An optical tracking system using stereo camera is used to capture the 3D pose of the teaching tool. The capturing algorithm is based on Circle Hough Transform (CHT) and Singular Value Decomposition (SVD). The developed tool and programming method have been tested experimentally. The results show successful capturing of the desired path points with a competitive level of accuracy compared with other methods.