--- a/python/cvutils.py	Tue May 30 16:10:18 2017 -0400
+++ b/python/cvutils.py	Thu Jun 01 10:33:07 2017 -0400
@@ -60,23 +60,6 @@
         fourcc += unichr((x >> 8*i)&255)
     return fourcc
 
-def plotLines(filename, origins, destinations, w = 1, resultFilename='image.png'):
-    '''Draws lines over the image '''
-    import Image, ImageDraw # PIL
-    
-    img = Image.open(filename)
-
-    draw = ImageDraw.Draw(img)
-    #draw = aggdraw.Draw(img)
-    #pen = aggdraw.Pen("red", width)
-    for p1, p2 in zip(origins, destinations):
-        draw.line([p1.x, p1.y, p2.x, p2.y], width = w, fill = (256,0,0))
-        #draw.line([p1.x, p1.y, p2.x, p2.y], pen)
-    del draw
-
-    #out = utils.openCheck(resultFilename)
-    img.save(resultFilename)
-
 def rgb2gray(rgb):
     return dot(rgb[...,:3], [0.299, 0.587, 0.144])
 

--- a/python/requirements.txt	Tue May 30 16:10:18 2017 -0400
+++ b/python/requirements.txt	Thu Jun 01 10:33:07 2017 -0400
@@ -1,10 +1,9 @@
 matplotlib
 numpy
 
-The following libraries are necessary for (sometimes very) specific classes/functions.
+The following libraries are optional. They are necessary for (sometimes very) specific classes/functions.
 
-CV functionalities (cvutils.py): opencv
-Image functionalities (cvutils.py): Python Image Library (new version is called Pillow)
-Machine learning (ml.py): scipy
+Computer Vision (cvutils.py): opencv, scikit-image
+Statistics and machine learning (ml.py): scipy, scikit-learn
 Moving object geometry (currently commented) (moving.py) and plotting shapely polygons (utils.py): shapely
-Tabular data loading/processing (storage.py): pandas
\ No newline at end of file
+Tabular data loading/processing (storage.py): pandas