from machinevisiontoolbox import Image

im = Image.Read("sharks.png")
im.disp()
blobs = im.blobs()
blobs[0].plot_MER("c--") # cyan dashed line
blobs[1].plot_MER(color="cyan", linestyle="--") # cyan dashed line
blobs[2].plot_MER(color="red")
blobs[3].plot_MER(color="orange", linewidth=3)