[Inkscape-user] Dissolve surrounded colors of a cropped image with the background

Hi,

I have two layers: a background in yellow and a cropped image in the other layer. Now I want to dissolve the cropped image in the background, how can i do that automatically? I know I have the smudge tool, but the results are not so good for me...

http://postimg.org/image/c433e336d/

2.8.2