The document discusses sourcing images from different methods including books, Google Images, stock image libraries, copyright free sites, and taking your own photos. It outlines the advantages and disadvantages of each method. For books, advantages are reliable sourcing information while disadvantages include limited selection. Google Images allows fast searching but sources may be unreliable. Stock images provide high quality photos but require purchasing. Using one's own photos provides full ownership but requires photography skills. The document also covers basic image processing techniques like cropping, resizing, adjusting resolution, and applying filters.