Re: [CinCV] RGB-FLOAT format
Tony Hardie-Bick <tonyhb@...
2010-09-06 12:31:37 GMT
When I had RGB-FLOAT working, I was doing a lot of colour distortion, and this
setting gave a much finer level of detail under these conditions.
This is because when you stack a number of RGB-processing filters of limited
precision, each one quantises its results to the colour precision, and this loss
of precision, in the integer (especially 8-bit) case, becomes visible when a
filter at the end of the chain tries to expand a difference between, say, a
value of 100 and 101 to 100 and 110. In the integer case, clearly you get a
sudden step from 100 to 110. In the floating point case, you get the full
gradation returned, even though the final output may still be quantised to
8-bits (per colour).
So I miss this, as I was doing a lot of colour distortion again.
On 05/09/10 21:13, Eli Billauer wrote:
> Just for my own (very pragmatic) curiosity: Is anyone here *using* any
> of the float formats for real? I would love to do so myself, since I
> usually find myself stacking several effects on the video tracks. But
> having tried quite a few precompiled Cinelerra versions over the last
> few years, this option always ended more or less with a black screen and
> nothing useful rendered.
> So instead of asking what went wrong in this specific case, can anyone
> stand up and say "I'm working with it, this is what I did"?