Distance measurement based on pixel variation of CCD images

Chen Chien Hsu, Ming Chih Lu, Wei Yen Wang, Yin Yu Lu

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

This paper presents a distance measurement method based on pixel number variation of CCD images by referencing to two arbitrarily designated points in the image frames. By establishing a relationship between the displacement of the camera movement along the photographing direction and the difference in pixel count between reference points in the images, the distance from an object can be calculated via the proposed method. To integrate the measuring functions into digital cameras, a circuit design implementing the proposed measuring system in selecting reference points, measuring distance, and displaying measurement results on CCD panel of the digital camera is proposed in this paper. In comparison to pattern recognition or image analysis methods, the proposed measuring approach is simple and straightforward for practical implementation into digital cameras. To validate the performance of the proposed method, measurement results using the proposed method and ultrasonic rangefinders are also presented in this paper.

Original languageEnglish
Pages (from-to)389-395
Number of pages7
JournalISA Transactions
Volume48
Issue number4
DOIs
Publication statusPublished - 2009 Oct

Keywords

  • CCD images
  • Digital cameras
  • Distance measurement
  • Image-based measuring systems
  • Pixels
  • Video signal

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Instrumentation
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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