[OpenICC] monitor/videocard identification (fwd)

[Ben Guthro]

On Dec 6, 2004, at 3:02 PM, Bob Friesenhahn wrote:
>
> Given that the world is transitioning from analog to digital (e.g. 
> DVI) connection to displays, it should be expected that at some point 
> all of the translation related to the display will move to within the 
> display itself in order to achieve the best color resolution.  Modern 
> LCD displays already contain translation tables (typically 10 bit) in 
> order to emulate CRT gamma and support user-adjustments, but they 
> can't usually be updated from the host computer.

While generally true, many of these displays that do support 12, or 14 
bit LUTs have errors, eg: banding in the grey ramps. Even with an 
expanded LUT, if the display requires that the LUT be monotonically 
increasing, the only way to properly calibrate this out would be to 
fine tune the corrections in the graphics card.

Many of these displays with user adjustable LUTs are adjustable via 
DDC/ci given the proper proprietary protocol.

Ben




Ben Guthro
Software Engineer
Center of Excellence for Display Technologies
a Gretag Macbeth Company
603.681.0315 x234