I have a task to extract watermark itself from a highly complex image. Below there is an example. We have, say this image:
Then we have some watermark like this one which is either transparent or white(black added for visibility here)
So we apply the watermark on the image with 5-10% opacity and get the resulting image.
So the question is whether it is possible to extract the watermark from the resulting image NOT having the original image. The result shouldn't be precise but the meaning of the watermark(that there is a person, sun, house, numbers, fish and a word) must be obtained. I have tried using photoshop and played with all different kinds of adjustments but I am able to obtain only pieces which are above some even background like parts of the word visible over the water. I am not asking for a complete solution because there seems to be no practical way but I am seeking for help and ideas in determining best practices to extract the watermark. All ideas appreciated!