Add support for opencv 4
Add support for opencv 4
kivy/kivy,rnixx/kivy,rnixx/kivy,matham/kivy,kivy/kivy,rnixx/kivy,inclement/kivy,matham/kivy,kivy/kivy,akshayaurora/kivy,matham/kivy,akshayaurora/kivy,inclement/kivy,akshayaurora/kivy,matham/kivy,inclement/kivy