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Changing values of default parameters and OFAST_MASK

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This commit is contained in:
Ankit Agrawal
2013-09-26 08:46:20 +05:30
committed by Johannes Schönberger
parent f0fea63350
commit a10fc660f8
1 changed files with 9 additions and 11 deletions
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skimage/feature/orb.py
+9 -11
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@@ -9,17 +9,15 @@ from skimage.transform import pyramid_gaussian
from .orb_cy import _orb_loop
OFAST_MASK = np.array([[0, 0, 1, 1, 1, 0, 0],
[0, 1, 1, 1, 1, 1, 0],
[1, 1, 1, 1, 1, 1, 1],
[1, 1, 1, 1, 1, 1, 1],
[1, 1, 1, 1, 1, 1, 1],
[0, 1, 1, 1, 1, 1, 0],
[0, 0, 1, 1, 1, 0, 0]], dtype=np.uint8)
OFAST_MASK = np.zeros((31, 31))
umax = [15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 11, 10, 9, 8, 6, 3]
for i in range(-15, 16):
for j in range(-umax[np.abs(i)], umax[np.abs(i)] + 1):
OFAST_MASK[15 + j, 15 + i] = 1
def keypoints_orb(image, n_keypoints=200, fast_n=9, fast_threshold=0.20,
harris_k=0.05, downscale=np.sqrt(2), n_scales=4):
def keypoints_orb(image, n_keypoints=500, fast_n=9, fast_threshold=0.08,
harris_k=0.04, downscale=1.2, n_scales=8):
"""Detect Oriented Fast keypoints.
@@ -134,7 +132,7 @@ def keypoints_orb(image, n_keypoints=200, fast_n=9, fast_threshold=0.20,
def descriptor_orb(image, keypoints, orientations, scales,
downscale=np.sqrt(2), n_scales=4):
downscale=1.2, n_scales=8):
"""Compute rBRIEF descriptors of input keypoints.
Parameters
@@ -206,7 +204,7 @@ def descriptor_orb(image, keypoints, orientations, scales,
curr_scale_orientation = orientations[curr_scale_mask]
border_mask = _mask_border_keypoints(curr_image, curr_scale_kpts,
dist=14)
dist=16)
curr_scale_kpts = curr_scale_kpts[border_mask]
curr_scale_orientation = curr_scale_orientation[border_mask]