Minimum Noise Fraction & Pixel Purity Index in ENVI

Almost all remote sensing images have mixed pixels. Different materials are components of image pixels and have a variety of features. Using the Pixel Purity Index (PPI), we can extract the purest pixels in multispectral and hyperspectral images. PPI will run on MNF (Minimum Noise Fraction) Output with large eigenvalues (greater than 1).

کلیدواژه ها:

Pixel Purity Index (PPI) ، MNF (Minimum Noise Fraction) ، ENVI