Measurement technology of image contrast based on CCD

Pengfei Hao; Wenji Si; Xiaodong Zhang; Yuanzong Li; Lihong Zheng

doi:10.1117/12.819703

31 December 2008 Measurement technology of image contrast based on CCD

Pengfei Hao, Wenji Si, Xiaodong Zhang, Yuanzong Li, Lihong Zheng

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 713040 (2008) https://doi.org/10.1117/12.819703
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

Abstract

This paper introduces a new high accuracy measuring method for dimension measurement in industry and a new concept of measurement of image contrast. The new point is to use algorithm of subpixel based on spatial moments and technology of image contrast estimate the exact location of edge within a pixel. The non-linear filter, edge location and subpixel applied in measurement are discussed. More important with the spatial moment and the subdivision technology the accuracy of edge location is improved lots. Real time industrial measure results demonstrates the super advantage of high accuracy dimensional measurement technology be maximum bias within 0.01 mm. Conclusion and discussion are given finally.

Citation Download Citation

Pengfei Hao, Wenji Si, Xiaodong Zhang, Yuanzong Li, and Lihong Zheng "Measurement technology of image contrast based on CCD", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 713040 (31 December 2008); https://doi.org/10.1117/12.819703

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