Web Scrapping an Image

I was thinking about the applications of web scrapping (still quite new to it) and came up with a question. Can you get an image from a page if there are advertisements on the page (like can you avoid advertisements and only look for the correct image content on the page)? Also, if the image is also a link to another page, can you say go to the next page and get that image (and then go from there until you either reach a certain amount or get all of the images)? This would mean avoiding going to the advertisements pages.