I am quite new in the field of remote sensing. I would like to do a separate classification of two Landsat 8 Level2 images and then do a LULCC change detection. For the pre-processing steps, it is recommended to correct radiometric/atmospheric.
I plan to convert from DN to ground reflectance (or radiance) using atmospheric models (e.g. the i.toar tool from Grass GIS). I have doubts about the relevance of this correction as I am using a Landsat 8 Level 2 image.
Is it mandatory to do this conversion for a L2 image before starting the classification?