The code to capture and manipulate depth-camera data will be reusable outside Cameo.py. So, we should separate it into a new module. Let's create a file called depth.py in the same directory as Cameo.py. We need the following import statement in depth.py:

import numpy

We will also need to modify our preexisting rects.py file so that our copy operations can be limited to a nonrectangular subregion of a rectangle. To support the changes we are going to make, let's add the following import statements to rects.py:

import numpy
import utils

Finally, the new version of our application will use depth-related functionalities. So, let's add the following import statement to Cameo.py:

import depth

Now, let's go deeper into the subject of depth.