Andrew Kolakowski wrote:MarcusWolschon wrote:
Could you elaborate on that?
It means it's not pure sensor dump as this would be probably useless without special math before debayering process.
It doesn't mean these formats are not RAW as much as they can be either.
Why not? That "special math" has always been needed for every raw processor out there.
The changelog of Adobe Lightroom is a good example for that.
Raw formats would hopefully contain ADC values, current camera settings and other metadata.
Then the raw processor - knowing this manufacturer's raw format -
can select the right function to turn the non-linear ADC response of each subpixel
into a linear intensity value including the interdependencies between nearby subpixels of other colors
and differences of these curves based on camera settings (such as ISO or sensor temperature)
or even image content (such as average image brightness, sensor saturation or blooming next to saturated pixels)
That conversion you called "special math" would be the so called "color science".
Why else does every raw processor for still cameras need to first get support for
a new camera model before the raw format of that camera can be interpreted?
Afterwards that raw processor can store these interpreted values in DNG = Digital Negative.
An open extension of the TIFF format capable or e.g. storing rgb bayer patterns.
It seems that "ProRes raw" is just an alternative to DNG that is not based on TIFF for individual images but on ProRes for series of images. Adding the ability of lossless (or lossy) compression of a series bayer patterns in the temporal domain and not just the spacial domain.