mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-28 04:39:13 +08:00
emmanuelle
55f5103dd8
Modified travis_script.sh to account for the new structure of the gallery Added README.txt files in directories of gallery examples Fixed references to gallery images in user guide pages Fixed broken links
38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
"""
|
|
================
|
|
Corner detection
|
|
================
|
|
|
|
Detect corner points using the Harris corner detector and determine subpixel
|
|
position of corners.
|
|
|
|
.. [1] http://en.wikipedia.org/wiki/Corner_detection
|
|
.. [2] http://en.wikipedia.org/wiki/Interest_point_detection
|
|
|
|
"""
|
|
from matplotlib import pyplot as plt
|
|
|
|
from skimage import data
|
|
from skimage.feature import corner_harris, corner_subpix, corner_peaks
|
|
from skimage.transform import warp, AffineTransform
|
|
from skimage.draw import ellipse
|
|
|
|
|
|
tform = AffineTransform(scale=(1.3, 1.1), rotation=1, shear=0.7,
|
|
translation=(210, 50))
|
|
image = warp(data.checkerboard(), tform.inverse, output_shape=(350, 350))
|
|
rr, cc = ellipse(310, 175, 10, 100)
|
|
image[rr, cc] = 1
|
|
image[180:230, 10:60] = 1
|
|
image[230:280, 60:110] = 1
|
|
|
|
coords = corner_peaks(corner_harris(image), min_distance=5)
|
|
coords_subpix = corner_subpix(image, coords, window_size=13)
|
|
|
|
fig, ax = plt.subplots()
|
|
ax.imshow(image, interpolation='nearest', cmap=plt.cm.gray)
|
|
ax.plot(coords[:, 1], coords[:, 0], '.b', markersize=3)
|
|
ax.plot(coords_subpix[:, 1], coords_subpix[:, 0], '+r', markersize=15)
|
|
ax.axis((0, 350, 350, 0))
|
|
plt.show()
|