Fast and accurate extraction algorithm for center of cross-line based on two windows scanning

Zhibin Chen; Mengze Qin; Yan Song; Wenjian Xiao

doi:10.1117/12.2199391

8 October 2015 Fast and accurate extraction algorithm for center of cross-line based on two windows scanning

Zhibin Chen, Mengze Qin, Yan Song, Wenjian Xiao

Proceedings Volume 9675, AOPC 2015: Image Processing and Analysis; 96751F (2015) https://doi.org/10.1117/12.2199391
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Multi-spectral integration target consists of collimator, lighting and target plate with cross-line and four-bar target. The high brightness image of four-bar target and stray light have a serious impact on the auto extraction for center of cross-line when do the optical axis parallelism on-line test using the multi-spectral target. To solve the problem, a fast and accurate extraction algorithm for center of cross-line based on two windows scanning was proposed. Firstly, using thresholding techniques get rid of the low brightness stray light. Then, using two windows scanning method get rid of the image of high brightness four-bar target and get the cross-line area. Lastly, according to the results to find the corresponding area in the gray-scale map of the original image, using energy accumulation method find the extreme point of energy. The value of x-axis and y-axis is the position of the center of cross-line. The results show that the algorithm is fast and accurate and can realize the extraction for center of cross-line under the influence of the high brightness four-bar target and stray light.

Citation Download Citation

Zhibin Chen, Mengze Qin, Yan Song, and Wenjian Xiao "Fast and accurate extraction algorithm for center of cross-line based on two windows scanning", Proc. SPIE 9675, AOPC 2015: Image Processing and Analysis, 96751F (8 October 2015); https://doi.org/10.1117/12.2199391

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