In order to carrying on the intelligent disease prevention and cure for glasshouse plants,this paper(researched) two kinds of familiar cucumber diseases in the method of picture processing.Compared several kinds of hue system using hue H as the color characteristic parameter,and distinguished between normal leaf and(diseased) leaf according to hue histogram statistic parameters and chroma histogram of section value.Studied the chroma distribution of normal and diseased leaves in different hue extent.The res...