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Double ExposureExploring the wonderful world of double exposing images. First you take two images. One with appx. +1.0 EV and then one with appx. -1.5 EV. Put the darker image on the front layer. They should end up looking somewhat like this: 
Then you can either mix them together 50% vs. 50% or use a mathematical formula to blend the two images. I think the formula (the 3rd picture) is the proper choice in most cases. 
The formula i came up with to mix the two images is like this. This formula should be run on the front layer (the dark one.): R = R G = G B = B A = 255 - ((255-(r+r+g+g+g+b+b)/7) * (255-(r+r+g+g+g+b+b)/7)/255) After this, you might want to apply a gamma of 0.71 to get the gamma back into place.  Website by Joachim Michaelis
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