Merge pull request #166 from 'vincent-albufera/exemple_modif'

DOC: Improve harris corners and peak detection examples and docstrings.

doc/examples/plot_harris.py

@@ -9,7 +9,7 @@ detection in multiple directions.
 .. [1] http://en.wikipedia.org/wiki/Corner_detection
 .. [2] http://en.wikipedia.org/wiki/Interest_point_detection
 """
-
+import numpy as np
 from matplotlib import pyplot as plt
 
 from skimage import data, img_as_float
@@ -19,16 +19,24 @@ from skimage.feature 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.')
+    y, x = np.transpose(filtered_coords)
+    plt.plot(x, y, 'b.')
     plt.axis('off')
-    plt.show()
 
+# display results
+plt.figure(figsize=(8, 3))
+im_lena = img_as_float(data.lena())
+im_text = img_as_float(data.text())
 
-im = img_as_float(data.lena())
-filtered_coords = harris(im, min_distance=6)
-plot_harris_points(im, filtered_coords)
+filtered_coords = harris(im_lena, min_distance=4)
 
+plt.axes([0, 0, 0.3, 0.95])
+plot_harris_points(im_lena, filtered_coords)
+
+filtered_coords = harris(im_text, min_distance=4)
+
+plt.axes([0.2, 0, 0.77, 1])
+plot_harris_points(im_text, filtered_coords)
+
+plt.show()