[OPTICAL REVIEW Vol. 20, No. 3 (2013) 259-265]
© 2013 The Japan Society of Applied Physics

Rapid Ultraspectral Matching Method Based on Crosscut Feature Extraction

Yu FANG, Yong MA*, Hao LI, Kun LIANG, Shengqing WANG, and Hongyuan WANG

Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China

(Received August 7, 2012; Accepted February 21, 2013)

A rapid matching method for ultraspectral data is proposed in this paper. We have expanded the concept of the histogram in image processing to spectral matching, and the sampled spectrum histogram is presented. On the basis of the sampled spectrum histogram, a spectral feature named the crosscut feature (CF) is developed. Specifically, we make a number of equally spaced horizontal lines on the ultraspectral curve, and count the number of intersections of each line with the spectral curve to obtain the CF vector. This process is simple and the dimensions of the CF vector can be adjusted to obtain better performance. The CF vector is extracted as the feature to implement the spectral matching procedure. Experimental results show that the CF method reduces the operation time significantly while maintaining a high matching accuracy, and is suitable for different ultraspectral matching applications.

Key words: ultraspectral data, spectral matching, dimensionality reduction, feature extraction, spectrum histogram, crosscut feature

*E-mail address: mayong@mail.hust.edu.cn