I used Gimp on MacOS for this lab.

These are my dogs before any filter was used.

For the avoidance of any doubt, this is a picture of George W. Bush. The image is from https://upload.wikimedia.org/wikipedia/commons/thumb/d/d4/George-W-Bush.jpeg/905px-George-W-Bush.jpeg

This is a picture of George W. Bush with my face pasted on top.