Information Moment for Chinese Character Recognition

Moment invariants firstly introduced by M.K Hu in 1962,has some shortcomings.After counting a large number of statistical distribution information of Chinese characters,the authors put forward the concept of information moments and demonstrate its invariance to translation,rotation and scaling.Also they perform the experiment in which information moments compared with moment invariants for the effects of similar Chinese characters and font recognition.At last they show the recognition rate of 88% by information moments,with 70% by moment invariants.     

基于电子鼻对不同植物油油炸薯片的区分

以大豆油,玉米油,葵花籽油,花生油及棕榈油5种植物油油炸的薯片为研究对象,利用电子鼻检测其在贮藏期内(0～60 d)的风味物质变化,根据主成分分析(Principal Component Analysis,PCA)、线性判别分析(Linear Discriminant Analysis,LDA)和Fisher判别分析,考察电子鼻对5种植物油油炸薯片区分效果。结果表明,在整个贮藏期内电子鼻传感器对样品的氮氧化物、硫化物和芳香类物质响应值高;PCA分析和LDA分析都可以代表样品的主要信息,但LDA分析的区分效果较PCA分析更明显;Fisher判别分析除0 d时1个样品被误判,总的正确判别率为96%,其余样品均未被误判,总的正确判别率都为100%。