You just create two np.float64 type zero arrays of size (1,65).
Now we go for grabcut algorithm with OpenCV. It is illustrated in below image (Image Courtesy: )
An algorithm was needed for foreground extraction with minimal user interaction, and the result was GrabCut. in their paper, "GrabCut": interactive foreground extraction using iterated graph cuts. GrabCut algorithm was designed by Carsten Rother, Vladimir Kolmogorov & Andrew Blake from Microsoft Research Cambridge, UK.