Hello, I am learning how to realize Spectral Unmixing. The imapge I am using is ETM. I want to get the soil reflectance after unmixing the mixture pixel. After Spectral Unmixing, I got the result image of soil and vegetation abundance. I want to know how I can get the soil reflectance of the specific pixel according to the soil and vegetation abundance of this pixel. The sum of abundance of soil and vegetation in a pixel is not equal to 1 when in the condition of Constraint or not. Thank you for your help!