Reading images

Probably the most common data that is not text is image data. Images had their own set of specific metadata that can be read to filter values or perform other operations.

A main challenge is dealing with multiple formats and different metadata definitions. We'll show in this recipe how to get information from both a JPEG and PNG, and how the same information can be encoded differently.

Getting ready

The best general toolkit for dealing with images in Python is, arguably, Pillow. This module allows you to easily read files in the most common formats, as well as perform operations on them. Pillow started as a fork of PIL (Python Imaging Library), a previous module that became stagnant some years ago.

We will...