Here is an example of scene-referred image that was entirely obtained with ICC-based tools.
It is the result of the exposure blending of 5 bracketed images. The RAW files were interpolated in PhotoFlow, and saved in the original camera colorspace before being aligned with
align_image_stack. The aligned images have been re-imported into PhotoFlow, converted to linear Rec.2020 and blended with luminosity masks.
The blended image has then be saved in two versions, one in the same linear Rec.2020 colorspace, and a second version saved with a V4 sRGB profile.
Both TIFF files have been saved with a +4ev exposure compensation, which results in a significant amount of pixels exceeding 1.0 (just to demonstrate the unbounded conversions). The files can be downloaded from here.
The two screenshots below show the image without exposure compensation. The first one is a direct display of the original image, while the second one corresponds to the sRGB TIFF, re-opened, converted to linear Rec.2020 and with a -4ev exposure compensation applied.
The perfect agreement between the two images shows that V4 profiles with parametric TRCs are perfectly suited for manipulating images with arbitrarily large values…