Following the same DR enhancement principle as used in dual-ISO, different ISO values could be user-defined for different horizontal areas of the sensor according to the scene, in a similar way GND filters do but far more configurable:
The DR enhancement can be up to 3 stops but interpolation is not needed in this case, so the loss of quality and issues found in dual-iso captures cannot take place.
The captured RAW data needs to be previously processed reducing RAW levels on the ISOs above ISO100 in order to have a final RAW file with uniform RAW levels (the same as those found in the lowest used ISO).
Sorry if this idea has already been posted or some technical reason makes it impossible to implement.
Regards
The DR enhancement can be up to 3 stops but interpolation is not needed in this case, so the loss of quality and issues found in dual-iso captures cannot take place.
The captured RAW data needs to be previously processed reducing RAW levels on the ISOs above ISO100 in order to have a final RAW file with uniform RAW levels (the same as those found in the lowest used ISO).
Sorry if this idea has already been posted or some technical reason makes it impossible to implement.
Regards