Add Clone/Stamp tool
We have some photos (pants/shorts) that have a small clip hanger in the photo. We typically use gimp or photoshop clone/stamp tool to clone from a nearby point to remove the hanger from the image. Would be a useful tool within your app.
AdminJacob N (Admin, Clipping Magic) commented
Pixel-level image editing features are a tricky and slippery slope - there are tons of browser limitations, and significant risk of interface cluttering.