from machinevisiontoolbox import Image

im = Image.Read("sharks.png")
im.disp()
blobs = im.blobs()
blobs[0].plot_centroid()  # default blue "o" and "x"
blobs[1].plot_centroid('rd', label=True) # red diamond with label
blobs[2].plot_centroid(marker="x", color="red") # red "x"
blobs[3].plot_centroid(marker="P", markeredgecolor="lightsteelblue", markerfacecolor="w", fillstyle="full")