I got the two partial differential function(X direction, Y direction) by using Sobel function in opencv. and then calculated magnitude by using magnitude function.
and get the tangent angle by using phase function.
when I using the phase function I wrote that —> phase(sobel x, sobel y, result, true)
I want calculate normal vector(angle) on the point by using result of phase.
I thought normal = direction / magnitude.
so, I tried … but result looks like wrong.
Can you guys teach to me right method???