A new method of center orientation for glass thickness image processing

Ni Yang; Yu-tian Wang

doi:10.1117/12.819680

31 December 2008 A new method of center orientation for glass thickness image processing

Ni Yang, Yu-tian Wang

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71303D (2008) https://doi.org/10.1117/12.819680
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

Abstract

The on-line float glass thickness measurement system is based on digital image technology. LCCD is employed to capture a set of images of the delivering glass ribbon in real-time, and accordingly the measured thickness computation is carried out through the center orientated images. A new method for extracting the central line of the glass thickness image has been put forward for the blurring edge and distortion of noise problems occurred in the thickness image. Firstly, Canny algorithm is employed to detect the light-stripe edge precisely. Secondly, an improved barycenter method is employed to acquire each stripe image center accurately within the edge region. Comparing to other center orientation algorithms, the improved barycenter method can remove the image noise more effectively. The experiment results indicate that the extraction precision can be improved to 0.1% and the relative error of the thin glass plates is less than 0.14%, therefore it provides a thickness measurement system in high precision and high stability.

Citation Download Citation

Ni Yang and Yu-tian Wang "A new method of center orientation for glass thickness image processing", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71303D (31 December 2008); https://doi.org/10.1117/12.819680

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