opencv polylines

polylines.py

def drawPolyline(im, landmarks, start, end, isClosed=False):
  points = []
  for i in range(start, end+1):
    point = [landmarks.part(i).x, landmarks.part(i).y]
    points.append(point)

  points = np.array(points, dtype=np.int32)
  cv2.polylines(im, [points], isClosed, (255, 200, 0), thickness=2, lineType=cv2.LINE_8)

# Use this function for 68-points facial landmark detector model
def renderFace(im, landmarks):
    assert(landmarks.num_parts == 68)
    drawPolyline(im, landmarks, 0, 16)           # Jaw line
    drawPolyline(im, landmarks, 17, 21)          # Left eyebrow
    drawPolyline(im, landmarks, 22, 26)          # Right eyebrow
    drawPolyline(im, landmarks, 27, 30)          # Nose bridge
    drawPolyline(im, landmarks, 30, 35, True)    # Lower nose
    drawPolyline(im, landmarks, 36, 41, True)    # Left eye
    drawPolyline(im, landmarks, 42, 47, True)    # Right Eye
    drawPolyline(im, landmarks, 48, 59, True)    # Outer lip
    drawPolyline(im, landmarks, 60, 67, True)    # Inner lip