Add comment about cropping.
Add comment about cropping.

kwagyeman/openmv,kwagyeman/openmv,kwagyeman/openmv,iabdalkader/openmv,openmv/openmv,iabdalkader/openmv,openmv/openmv,kwagyeman/openmv,openmv/openmv,openmv/openmv,iabdalkader/openmv,iabdalkader/openmv