Originally Posted by madshi
I might try to automate calibration with madVR + ArgyllCMS in a future madVR version. For that I'd like to find a test pattern configuration that works best for all the types of displays out there, to make things easier for the user. Can you guys please help me with this? Which background level and pattern area should I choose for which types of display? Let me try:
(9) LCD/SXRD/D-ILA projector with dynamic iris: ???
(10) DLP projector without dynamic iris: default settings
(11) DLP projector with dynamic iris: ???
Also which configuration makes the most sense for projectors with a dynamic iris?
Dynamic iris? Like my vpr Planar 8150... Sounds an extremely challenging stuff for Graeme..... Basically I think a LUT would need more dimensions
, because it should also map the behaviour of the system vpr-screen to the global APL of the image. A RGB signal appears on screen differently when the iris is closed from when it's half opened, so the characterization of the /displayprojector should also learn how the output varies with variations of the APL of the image (supposing the iris acts only based on the light output).
This approach would also solve the issue of a continuing changing gamma curve. Infact I disabled the dynamic iris, called Dynamic Black, simply because in dark scenes it modifies the behaviour of the vpr, pushing up the contrast, and causing an unsolvable white crashing in lights on dark background.
Of course....also measuring patches would become extremely challenging, since each patch should be measured for, let's say, at least 10 iris positions/image apl...... a nightmare!
But it may be a breakthrough for front projection, since it would be possible to take into account also the white wall reflections (e.g. using window pattern with raising gray in background). Now Argyll of course could not lower the black level on screen raised by reflections, but if the gamut of the display is pretty larger than the source's one, gamut mapping algorythms may try to recover saturation of washed colors.Edited by Kukulcan - 9/20/13 at 2:12am