Merge pull request #106 from NelleV/harris_corner_detection

Harris corner detection

doc/examples/plot_harris.py

@@ -0,0 +1,30 @@
+"""
+===============================================================================
+Harris Corner detector
+===============================================================================
+
+The Harris corner filter detects interest points using edge detection in
+multiple direction.
+"""
+
+from matplotlib import pyplot as plt
+
+from skimage import data, img_as_float
+from skimage.filter import harris
+
+
+def plot_harris_points(image, filtered_coords):
+    """ plots corners found in image"""
+
+    plt.plot()
+    plt.imshow(image)
+    plt.plot([p[1] for p in filtered_coords],
+             [p[0] for p in filtered_coords],
+             'b.')
+    plt.axis('off')
+    plt.show()
+
+
+im = img_as_float(data.lena())
+filtered_coords = harris(im, 6)
+plot_harris_points(im, filtered_coords)