bigmachead wrote:
Does the withe balance of digital camera effect the test **?"
The white balance of the camera applies to the whole image and not only to specific areas.
(Same holds for display color balancing with ColorSync Utility)
Hence it shouldn't affect the test whose purpose is to show that the same color is not displayed uniformly in different areas of the screen.
For a moment, forget your camera and look at your screen during the grey bar test: do you see upper and lower bars of the same identical shade of grey?
a) Yes
Excellent! The yellow was produced by the camera and your screen is perfect.
You're a lucky guy (
very lucky!)
b) No
In this case, the camera reported correctly what your very eyes were seeing.
(within the limits of fidelity imposed by the whole lens-sensor-imaging software system, of course)
But in the end, what's important is if your eyes see the yellow, and if this yellow disturbs your normal use of your iMac _in real situations_ and not when staring at grey bars!
(We didn't buy our iMacs to look at grey bars and incessantly post messages on Apple Discussion Threads, did we?)
Taking pictures and posting them is just a way to share information with other people, but a camera is not a measuring instrument.
To objectively measure the (in)fidelity of your display, you need a colorimeter (that someone on this thread already used) that will give you a measure of how between different parts of the screen render the same color.
