8
Two
Edge-based Texture Measures
1.
edgeness
per unit area
2. edge magnitude and direction histograms
Fedgeness =
|{ p | gradient_magnitude(p) ³ threshold}| / N
where
N is the size of the unit area
Fmagdir = ( Hmagnitude, Hdirection
)
where these are the normalized
histograms of gradient
magnitudes and gradient directions,
respectively.
How would you compare two histograms?