Activity Guide - Lossy Compression

Reflection

After completing the activities in class, answer the following:

How is the widget from today different from the widget used last week?

There are no symbols being used and the vowels are removed instead of making symbols for words.

Navigate to puzzle 1 in code.org

What do you notice about the quality of the image when you compress it?

The quality gets worse and pixelated to the point that you can’t make out the picture

What do you notice about the compressed file size?

The compressed file size pixels get bigger and you can’t see what exactly the picture is.

Navigate to puzzle 2 in code.org

Share out the compressions you have made with students nearby. Try to guess the images.

Computer Science Principles