ENVI Dark Object Subtraction

I spent several hours this past week tying up loose ends of the project by learning a new mapping software called ENVI. This key program is a vital source of my project because it has a tool that GIS doesn’t have, called ‘Dark Object Subtraction (DOS)’. This DOS tool searches the image for the darkest pixel and then subtracts that value from the whole image. This subtraction helps reduce hill shadows, cloud coverage, and floating particle accumulation.