TE269
OECF Chart (following ISO 15739) D280

For high dynamic range cameras, the OECF
charts with patches calculated according
to ISO 14524 are not that convincing.
Densities are calculated according to the
cube root formula result in large steps in
the high-density patches. Image Engineering’s
solution for the problem is the TE269, a 36
patch OECF chart which basically follows
ISO 14524 but implements additional steps
especially at higher density levels.