More results. First image is the raw with WB and exposure compensation to magnify highlights, second is the same plus highlights reconstruction in guided laplacians, third is the same plus filmic highlights reconstruction on top.
- in situations where the 3 channels are all clipped over large regions, it does nothing, which is a gracious way of failing. It doesn’t seem to create artifacts otherwise.
- Large regions will need more steps of filmic HL reconstruction to propagate color from further away, which is expected. In any case, color is not defined at this place in the pipeline, before full CAT and profiling, so it needs to be handled later.
- Having at least one non-clipped channel is a huge help.
- The diffuse and sharpen module could be easily modified to introduce an iterative texture synthesis mode.
Side-note : the scene-referred framework is of the essence here. In display-referred, reconstruction methods try to darken the blown areas to make them fit the display range. This voids the cognitive relationships of relative luminance: blown areas are expected much brighter than their surrounding. Dealing with dynamic range later allows to enforce this cognitive relationship by brightening blown areas as they should.