Change LK default parameters

Author: dnerini

pysteps/motion/lucaskanade.py

@@ -55,7 +55,7 @@ def dense_lucaskanade(input_images,
                       nr_std_outlier=3,
                       k_outlier=30,
                       size_opening=3,
-                      decl_scale=10,
+                      decl_scale=20,
                       verbose=False):
     """Run the Lucas-Kanade optical flow routine and interpolate the motion
     vectors.

pysteps/utils/images.py

@@ -30,10 +30,10 @@
 
 
 def ShiTomasi_detection(input_image,
-                        max_corners=500,
-                        quality_level=0.1,
-                        min_distance=3,
-                        block_size=15,
+                        max_corners=1000,
+                        quality_level=0.01,
+                        min_distance=10,
+                        block_size=5,
                         buffer_mask=0,
                         use_harris=False,
                         k=0.04,