Equal triangles
x/z = x/f
vanishing points
x = X*f/z, y = Y*f/z
lens
1/f = 1/Z – 1/z
Computer vision
-classify object
-3D recognition
Invariance
0…255
+- mask
reasons to blur
-downs sampling
-noise reduction
I * (f * g)
Gaussian kernel
Harris Corner Detector
Σ(Ix)2 -> large
Σ(Iy)2 -> large
Modern feature detector
-localize
-unique signatures
