Function build_grididx

imagepy/core/myvi/util.py:28–33

(r, c)

	return ridx

def build_grididx(r, c):
	idx = np.arange(r*c, dtype=np.uint32)
	rs, cs = idx//c, idx%c
	idx1 = idx[(rs<r-1)*(cs<c-1)].reshape((-1,1))
	did = np.array([[0, 1, 1+c, 0, 1+c, c]], dtype=np.uint32)
	return rs, cs, (idx1 + did).reshape((-1,3))

def build_surf2d(img, ds=1, sigma=0, k=0.2):
	from skimage.filters import sobel_h, sobel_v