DETERMINATION OF THE SOIL LINE PARAMETERS FOR AUTOMATED DETECTION OF BARE SOIL ON SPACE PICTURE
The investigation of the spectral properties of the soils of the Belgorod region by satellite images Landsat. Analyzed the position of bare soils in the two-dimensional space of spectral features (NIR/RED scatter plot). Been established that for zonal soil types and subtypes can build a single soil line. The slope of the soil line is 1.51, and the coordinate of the soil line crossing the y-axis is equal to -0.20. On the basis of these parameters can be calculated a series spectral indices: PVI, WDVI, MSAVI, TSAVI and RVIc. With recognition of bare soils has the highest efficiency index WDVI. It has the highest indicator of soil separability (M-statistics) from agricultural vegetation. Practical testing of the index, calculated on the basis of parameters derived by us soil line held during the automated recognition of bare soil. For this used the method of density slice of grayscale image. Accuracy of recognition assessed by constructing a confusion matrix. Been achieved recognition accuracy of bare soil equal to 92.8 %.