import holoviews as hv
hv.extension('matplotlib')

penguins = hv.RGB.load_image('../assets/penguins.png')
bounds = hv.Bounds((-0.15, -0.4, 0.2, 0))
penguins * bounds.opts(color='orange', linewidth=6)

penguins * penguins[-0.15:0.2, -0.4:0, 'G'] * hv.Bounds((-0.15, -0.4, 0.2, 0))