пн, 6 нояб. 2023 г., 18:02 Andrew Randrianasulu <[email protected]>:
> > > пн, 6 нояб. 2023 г., 11:49 Andrea paz <[email protected]>: > >> I did some tests to see which of the major CC plugins use floats and >> which use integers. >> It turns out that only Blue Banana and Gamma support values above the >> range (0-1.0). Histogram Bezier reads values above 1.0 but does not >> use them, returning the usual clip. >> I start by showing the original image (png) where we can see details >> in the brightly lit window. In Compositor we don't see those details, >> getting only pure whites. So CinGG does not support HDR, as we already >> know (project setting to RGBA-FLOAT). However, even if we don't see >> them the details are there. To see them we have to do Tone Mapping, >> for example by decreasing the brightness levels until the values above >> 1.0 are back inside the range. >> With the Histogram plugin you can easily do this by lowering the white >> point along the vertical. No plugins show the details hidden in the >> white point except Blue Banana and Gamma. Since HDR is handled only in >> floating point (there are no values outside the range 0-255 or 0-1023, >> etc.), then I believe that all plugins work on integers except the two >> mentioned above. >> > > this is a bit strange because I remember Adam's page showing raw file > processing where difference was there, in hv 2.x era .... > > > https://web.archive.org/web/20100501142034/http://www.heroinewarrior.com/cinelerra_shots.php > > oh, even 1.x era! > > > https://web.archive.org/web/20100526091542/http://www.heroinewarrior.com/movies.php > https://web.archive.org/web/20040529041549/http://heroinewarrior.com/cinelerra_8bit.jpg but yeah, this one talks about 10 vs 8 bit per channel output and 16 bit per channel (not float) processing in cinelerra 1.x > are you sure you have 16 bit per channel png as input, with levels going > up above 255? > > same with exr, from, for example Blender or Natron as input? > > or may be you run into fact that values clips when processed by any but > those two plugins? Then there must be some bug preventing negotiation of > float colorbuffers for plugins somewhere ... > > can you try another "lowering" tecnique, like creating 0.75 exr and > subtract it from overbright image as layer/track mode? > > The test video can be found here: >> https://streamable.com/rh62t9 > > > > >>
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