imMeshLayer = cv2.imread('testLayer6_.png', -1)
imMesh = cv2.imread('new_refined2__DXF.png', -1)

"""
binary conversions
"""
imGrayMshLayer = cv2.cvtColor(imMeshLayer, cv2.COLOR_BGR2GRAY)
(thresh, imMeshly_bw) = cv2.threshold(imGrayMshLayer, 128, 255,
                                      cv2.THRESH_BINARY | cv2.THRESH_OTSU)

imGrayMsh1 = cv2.cvtColor(imMesh, cv2.COLOR_BGR2GRAY)
(thresh, imMesh_bw1) = cv2.threshold(imGrayMsh1, 128, 255,
                                     cv2.THRESH_BINARY | cv2.THRESH_OTSU)

# connected components
invBwMesh = cv2.bitwise_not(imMesh_bw1)
cv2.imwrite('invMehs.png', invBwMesh)

"""
connect components
"""
connectivity = 4

# Perform the operation
output = cv2.connectedComponentsWithStats(imMesh_bw1, connectivity, cv2.CV_32S)
# Get the results
# The first cell is the number of labels
num_labels = output[0]
# The second cell is the label matrix
labels = output[1]
# The third cell is the stat matrix
stats = output[2]
# The fourth cell is the centroid matrix
centroids = output[3]