[argyllcms] Re: Getting back to using argyllcms. Some questions.

  • From: Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 28 Nov 2008 21:36:37 -0600

On Fri, 2008-11-28 at 19:18 -0800, Hal V. Engel wrote:
> On Friday 28 November 2008 18:44:06 Leonard Evens wrote:
> > On Sat, 2008-11-29 at 12:16 +1100, Graeme Gill wrote:
> > > Leonard Evens wrote:
> > > > I understand correctly, that term refers to a table stored in my video
> > > > card.  Does the monitor have its own LUT which is used to `calibrate'
> > > > the monitor?
> > >
> > > Generally LCD's have their own lookup tables they process the
> > > video data through before sending to the actual panel. It is
> > > this mechanism they use to simulate the range of controls
> > > that people expect to be on monitors. For color calibration
> > > and profiling purposes, these simulations usually degrade
> > > the resulting images.
> > >
> > > Graeme Gill.
> >
> > I reviewed for myself how LCD monitors work.   Is there anything, such
> > as the brightness of the light soure, which one adjusts at the hardware
> > level.  Or it it just all done by  the internal LUT.
> 
> For consumer grade LCDs the only adjustment that does not use the internal 
> LUT 
> is the back light level (brightness).  Everything else (contrast, color 
> controls, gamma...) uses the internal LUT.
> 
> Hal 

Is the back light level denoted Brightness or is it denoted Contrast?



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