This app gives the impression it helps you create masks, like photoshops "refine edge" feature so you can realistically compose images. It does no such thing. It allows you to place one image on top of another image and then adjust the transparency. Thats essentially all it does. You CAN create a mask manually by painting on the image but its incredibly crude and inaccurate. Theres no method to select colour ranges, find edges, or any of even the simplest automatic masking tools. The sample images shown would be impossible to create with this app.
ravisorg about Image Blender, v2.4.3