STUDY ON THE APPLICATION OF GRADIENT ANALYSIS TECHNIQUE IN PLANT DROUGHT RESISTANCE Computer Image Analysis of Pollens from Torrega(Torreya Arn.) Advances in consideration and application of identification methods for powdered Chinese materia medica Diagnosis of cotton N status using digital image analysis technique Vegetation Change Monitoring for the Natural Forest Protection Based on Spatial Analysis Techniques Studies on Cnidium Fruits by Stereological Method and Computer Image Analysis