Is there a filter for VirtualDub which can apply alpha blending in reverse order, that is, (Val1–Val2*Alpha)/(1–Alpha) instead of normal Val1*(1–Alpha)+Val2*Alpha?īy the way, if you know a plugin for “reversed” applying of layers for PhotoShop, please tell me.
The problem is, my app is for still images, but I need a filter. (I believe it can be done, but I haven't tried it yet.) While not perfect, all I need now is to use DeBlend to repair small edges. I've also tried applying reverse alpha blend using my own application and this reproduction of original watermark (it's white with alpha channel, so you may see only white) and got this result: The plugin came to wrong conclusion that some areas need to be repaired etc.
Some frames looked quite good, some looked terrible. I've tried using DeLogo to analyse the whole video with this DeBlend mask, but results were unsatisfactory. There's a huge watermark over the whole screen, but it's transparent (only around 15% opacity) and it's quite easy to reproduce roughly.
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