We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A method for correcting radial distortion based on verifying the planarity of specimens.
- Authors
Shih, Ming-Hsiang; Tung, Shih-Heng
- Abstract
Image distortion is inevitable when an image is captured through a lens. While the digital image measurement technique is getting popular, image distortion problem can result in significant error. A new distortion correction method is proposed in this study. The proposed method is based on the fact that a flat surface should keep flat when it is measured using three-dimensional (3D) digital image measurement technique. The 3D digital image measurement technique adopted in this research is the simplified 3D digital image correlation (DIC) method. Because radial distortion has a more noticeable influence than other types of distortions, this method deals only with radial distortion. A few experiments are carried out in this study to verify the correctness of this method and its accuracy. Both simulated data and actual image data are adopted in these experiments. The results show that this method can achieve a good accuracy. The standard deviations caused by random errors are about the same order as the random errors. It also shows that this method is suitable for both large and small distortion conditions.
- Subjects
RADIAL distortion; DIGITAL image correlation; STANDARD deviations; THREE-dimensional imaging; MEASUREMENT errors
- Publication
Sādhanā: Academy Proceedings in Engineering Sciences, 2017, Vol 42, Issue 11, p1943
- ISSN
0256-2499
- Publication type
Article
- DOI
10.1007/s12046-017-0730-9