Image-based system for measuring dimension of short hollow cylinders

  • Authors:

  • Chin-Tun Chuang;Cheng-Chuan Chen;Ming-Chi Lu;Chih-Hung Chuang

  • Affiliations:

  • Department of Mechanical and Computer-Aided Engineering, St. John's University, Tamsui, Taipei County, Taiwan;Department of Electrical Engineering, St. John's University, Tamsui, Taipei County, Taiwan;Department of Electronic Engineering, St. John's University, Tamsui, Taipei County, Taiwan;Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan

  • Venue:
  • ISCGAV'07 Proceedings of the 7th WSEAS International Conference on Signal Processing, Computational Geometry & Artificial Vision
  • Year:
  • 2007

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Abstract

In this paper, a novel image-based method is proposed for measuring th dimension of short hollow cylinders without physical contact. The proposed method can measure the inner diameter, height, and thickness of the short hollow cylinder with one exposure by using a single digital camera. Because of a rise-down platform of camera positioning control device developed in this paper, the aforementioned measuring method can reduce expenses and processing time during the measurement. It can perform 3D distance measuring based on a 2D image frame. This measuring system is equipped with a function to automatically adjust the resolution. As a result, maximal image contour of an unknown short hollow cylinder picture can be obtained so as to achieve measuring results with highest resolution at each time. The effectiveness of the proposed approach in measuring the inner diameter, height and thickness of the short hollow cylinder has been validated by using gray scale chromatic aberration of the image contour regions. The measurement system not only increases the accuracy of the measuring results but is also applicable to any kinds of digital cameras.