KnutH said...
Wow that's quite impressive!
Apparently the algorithm is not only interpolating colours, but also bottom contours, even though they don't have that much of a pattern.
One "black hat" application of this could be the ability to remove watermarks..
Its obviously not perfect, for example, removing the kite is not quite as successful which is why I didn't put it in, but if you are doing photos of people you could quite easily remove pimples etc.
The thing that impresses me is that its so simple and if you don't like the result, you can just do the area again and get a different result. I did that with the bottom right corner to show you could do the same area twice and get a slightly different result.
Here is the actual results
Before
After