On Apr 1, 2004, at 1:07 AM, address@hidden wrote:
on the openEXR-website they say that they use the openEXL-format for
2k or
hd scans of filmed sequences.
How do they get the high dynamic range when scanning? Do they scan the
sequences multiple times with different "exposure"-settings?
Normal filmscanners output 10 bit logarithmic cineon files - is the 10
bit
log colordepth enough to generate openEXR-files?
In 10-bit log space (values 0-1023), 95 is usually considered black and
685 white. So there is a considerable amount left over to represent
values over white, which film scanners have been capturing for a while.
I think that definition of 0-1 is based on a monitor's dynamic range,
which film exceeds.
But does this mean that ILM and possibly others are scanning directly to
EXR and never going through 10-bit Cineon? Drool.
Brendan