About Background Eraser
From the developer's description on Google Play.
This is an application for cutting pictures and for making a picture's background transparent.
The resulting images can be used as stickers with other apps to make a photomontage, collage.
- - - Features - - -
"Magic" mode - Detects image edges to erase easily & accurately.
"Auto" or "Color" mode - Erases similar pixels automatically.
It's very important to make a picture's background transparent accurately if you want to superimpose photos and make good composite photos.
By using this app, you can do it better.