Matty:
What I did was edit curves in photoshop. If you had photoshop you could batch process it, but I couldn't tell you exactly how I adjusted the curves. I wouldn't do what I did anywy though because I had to do a non-linear adjustment to try to bring out the darkest patches without killing the stuff that's supposed to be black. Ie, the result you'd get if you just turned up the brightness slider.
Also what I did didn't result in a very pretty image. I mean look at the dark shadows, how the gradient is fairly sharp. Like at the top right. And the gradient on the character icon too is now off.
But you could try doing a linear edit and see if that works out for you. What I mean by that is using standard brightness/contrast adjustments, rather than making funky shaped brightness curves. To do that, just increase the contrast and brightness slowly making sure to keep the blacks black until you get the bright stuff to the point it needs to be. Or if you can do levels then you could do a more sane non-linear adjustment and slide the middle slider to the left to bring up the midtones. But in my experiments I don't really think that either of those will brighten up the dark areas enough.
Oh and when I did that adjustment I also had to increase the saturation a bit because what looks properly saturated when dark looks desaturated when lighter.
What I did was edit curves in photoshop. If you had photoshop you could batch process it, but I couldn't tell you exactly how I adjusted the curves. I wouldn't do what I did anywy though because I had to do a non-linear adjustment to try to bring out the darkest patches without killing the stuff that's supposed to be black. Ie, the result you'd get if you just turned up the brightness slider.
Also what I did didn't result in a very pretty image. I mean look at the dark shadows, how the gradient is fairly sharp. Like at the top right. And the gradient on the character icon too is now off.
But you could try doing a linear edit and see if that works out for you. What I mean by that is using standard brightness/contrast adjustments, rather than making funky shaped brightness curves. To do that, just increase the contrast and brightness slowly making sure to keep the blacks black until you get the bright stuff to the point it needs to be. Or if you can do levels then you could do a more sane non-linear adjustment and slide the middle slider to the left to bring up the midtones. But in my experiments I don't really think that either of those will brighten up the dark areas enough.
Oh and when I did that adjustment I also had to increase the saturation a bit because what looks properly saturated when dark looks desaturated when lighter.