How to programmatically remove a WaterMark from WaterMarked Image using C# .Net

Hi there!

Is there any way in order to remove a watermark from an image? What has to be done is to lose the existing watermark as much as possible and place a new watermark text instead. As the existing watermark is placed diagonally, cutting the image in two equal parts (triangles), I am thinking of possibility to detect the diagonal and then determine the watermark text height (size / dimensions), and after that apply the Gaussian method of blurring (or anything similar) on the determined part. After it's edited, the image would be exposed to a code that would generate the new watermark. Is this possible to do, after all?