Auto-bright is performed on Auto-bright is performed on dcraw_make_mem_image() stage and changes the range of input data that mapped into output (gamma-corrected) image, based on image histogram (in linear space). So, yes, it is done in linear space, but on output. -- Alex Tutubalin @LibRaw LLC reply
Auto-bright is performed on dcraw_make_mem_image() stage and changes the range of input data that mapped into output (gamma-corrected) image, based on image histogram (in linear space).
So, yes, it is done in linear space, but on output.