Image Measurement of Cotton Quartile Length

棉花学报 Cotton Science 2005，17(6)：348-352

Image Measurement of Cotton Quartile Length
HE Xiao-feng^1，2，LIU Wen-yao¹，WU Guo-xin²(1.College of Precision Instrument and Opto-electronic Engineering，Tianjin University，Key Laboratory of Opto-electronics Information and Technical Science，Ministry of Education， Tianjin 300072，China; 2.Institute of Cotton Research and Engineering，Anhui University of Finance and Economics，Bengbu 233041，China)

Abstract：This paper offers a new method of measuring cotton quartile length.The originality of this method lies on an accurate testing system which is mainly composed of one CCD， a computer and a high light source; and it can precisely measure the second order accumulated numbers of cotton fibers on any point of Hertel curve. For calculating the cotton fiber length distribution of those fibers of which lengths are longer than their majority， a mathematical model has been constructed on the base of possibility theory and it is really effective in getting cotton weight of different length segments. The experiment shows that the results produced by our method and Y111 are so correlated that we have R²=0.94，while the former is pretty faster and more convenient.
Key words：cotton fiber；quartile length；Y111；image measurement
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