Plot images

Perhaps the most critical principle of image analysis is: look at your images!

Matplotlib's imshow() function gives you a simple way to do this. Knowing a few simple arguments will help:

• cmap controls the color mappings for each value. The "gray" colormap is common, but many others are available.
• vmin and vmax control the color contrast between values. Changing these can reduce the influence of extreme values.
• plt.axis('off') removes axis and tick labels from the image.

For this exercise, plot the CT scan and investigate the effect of a few different parameters.