Update README.md

README.md

@@ -32,8 +32,11 @@ appear as black regions, being the background white.
 parameters. The information provided for each blob is:
 
     **id** (string): the identifier of each blob is build from the color_id parameter and the index of the blob.
+    
     **center_x** (unsigned int): position in pixels of the center of the blob in the image (x axis).
+    
     **center_y** (unsigned int): position in pixels of the center of the blob in the image (y axis).  
+    
     **size** (float): Size of the blob in pixels.
 
 ## parameters