Scene-referred editing with PhotoFlow

[Carmelo_DrRaw]

I did a further test using the example image from your OCIO thread: Scene-referred editing with OCIO enabled software - #43.

I have processed the IT8 target image as outlined above, saving the result in linear Rec.709. The result matches very closely what you obtained with

dcraw -T -4 -w -q 3 -n 100

there is just a slight difference which is probably due to a small difference in the saturation points that are assumed when normalizing the RAW values.

My TIFF (together with your original TIFF from dcraw) can be downloaded from here: Filebin | ibhc7xtz1dz4dssw

@gez

Does the raw developer use libraw?

No, it is based on RawSpeed (same as for Darktable).

@gez

Regarding the lens correction, theoretically I think it’s fine, but you’ll have to make sure that the operation is designed for scene-referred RGB and won’t mess with your light ratios.

The vignetting correction is applied to linear pixel values in the camera colorspace, before any ICC conversion, which I’m pretty sure is the correct procedure (and the one expected by the LensFun code).