Zanzo opened this issue on Aug 12, 2009 · 42 posts
stewer posted Wed, 12 August 2009 at 6:43 PM
Quote - Blue = ETM
Red = GCDang I should have graphed them a long time ago. Again, I saw similar output, and made an assumption.
Are you sure that's the y=1-e^(-qx) graph? That function never exceeds y=1.0, your graph however does.
> Quote - Stewer, why did you only give us one of the two control parameters in ETM? We have Exposure, but not Exposure_Gain. Why?
The gain parameter is neither practical nor useful. Since the exponential function never exceeds 1.0, there's no use for gain < 1. Gain > 2 on the other hand blows out really, really quickly, if you then lower the exposure to compensate, you end up with a linear function = no tone mapping. Play with if you like, it's exposed through Python and pz3.