I have a lot of images that I created a while back, and all of them have the same watermark in the same location. I don\'t have the originals. I also have the original watermark
Once you apply a watermark over an image, the original data of the image that gets covered by the watermark is gone forever. All you can do is use some blending and interpolation techniques to "guess" the original data. Having the original watermark helps you to identify it easier in your images. Maybe you can use the AForge .NET library to accomplish the task.