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    • 48. 发明专利
    • Method and apparatus for substance identification
    • AU2008243199B2
    • 2011-12-01
    • AU2008243199
    • 2008-11-10
    • NUCTECH CO LTDUNIV TSINGHUA
    • XUEWU WANGZHIQIANG CHENZIRAN ZHAOYUANJING LILI ZHANGKEJUN KANGYINONG LIUYONGSHUN XIAOQINGPING HUANG
    • G01N23/02
    • Abstract' A method for substance identification and an apparatus 5 thereof are disclosed. The method comprises comprising steps of: transmitting an object under inspection using high-energy rays and low-energy rays, so as to obtain a high-energy transmission image and a low-energy transmission image for the object, wherein a value of each 10 pixel in the high-energy image indicates a high-energy transparency of the high-energy rays with respect to corresponding parts of the object, and a value of each pixel in the low-energy image indicates a low-energy transparency of the low-energy rays with respect to 15 corresponding parts of the object; calculating a value of a first function for the high-energy transparency and a value of a second function for the high-energy transparency and the low-energy transparency, for each pixel; and classifying locations determined by the value 20 of the first function and the value of the second function using a pre-created classification curve, so as to identify the type of the substance of a part of the object corresponding to each pixel. With the present invention, it is possible to not only obtain a transmission image of 25 the object, but also obtain material information in the object. Fig. 4B N \Melbourne\Cases\Patent\79000-79999\P79403. AU\Specis\P79403AU.GHSPECI.doc 10/11/08 F1080117 1/9 Fig. 1A Fig. 1B 10-- -1 0 f>10- l F b3 0.0 I C A Fe P 0.1 > 1[ Enrg(MV Fig 1C