These are collected from all over the web, most of them are the official WB ones.
These pictures I snapped off the respective DVDs, over 900 from The Philosopher's Stone, over 800 from The Chamber of Secrets, another 800 from The Prisoner of Azkaban and nearly 1200 from The Goblet of Fire. *grins* Yeah, I had a lot of time on my hands.
Katie's pictures are brilliant quality. A must-see for every Riddle fan.