×ptimized erode/dilate (#760)
×ptimized erode/dilate (#760)

* optimized erode/dilate
Co-authored-by: Larry Bank <b4c90499e7ac353e8aadcd3c7e6040a8e2ff0a64@gmail.com>
kwagyeman/openmv,kwagyeman/openmv,openmv/openmv,kwagyeman/openmv,iabdalkader/openmv,openmv/openmv,iabdalkader/openmv,openmv/openmv,openmv/openmv,iabdalkader/openmv,iabdalkader/openmv,kwagyeman/openmv