Never been in a football ground, or a gig?
Blind?
Really? Even CRT TVs use phosphors that emit light with holes in the spectrum and LCD ones use fluorescent backlights (well those that don't use LEDs).
Light as we perceive it does though.
Try putting a white image on the TV and notice how it illuminates the room. In fact you can vary the colour quite a bit before the room colours look odd.
A large percentage of men have defective colour vision.
snipped-for-privacy@davenoise.co.uk...
Oh no it doesn't!
Try reading this:
Understand that although the pigments in our retinas have _peak_ sensitivities that coincide with particular parts of the spectrum, they are sensitive over broad swathes - they are not narrowband filters. You can see well into what is normally called the infra-red part of the spectrum if there is no shorter wavelength/higher frequency light around masking the infra-red. Granted, the pigment is not particularly sensitive at infra-red wavelengths, but there is enough of a response to see by. See
Mine isn't, when were you tested?
A rule of thumb is 30% of males with blue eyes.
You can then add in the pig headed ones who simply don't notice colour subtleties.
snipped-for-privacy@davenoise.co.uk...
Accurately, yours wasn't when tested; and conformed to the norms that were tested for. Colour vision can deteriorate over time, and there are illnesses that affect colour vision, as do some drugs (it is well known side effect of 1-[4-ethoxy-3-(6,7-dihydro-1-methyl-7-oxo-3- propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl) phenylsulfonyl]-4- methylpiperazine citrate that it can cause cyanopsia (blue-tinted vision). The drug in question is the subject of many spam emails, so I'm not using the more common names). Be careful not to generalise from your particular case.
Cheers,
Sid
Right. So it's just down to lack of perception. If you think all TVs look the same. There can be differences between two of the same make and model. Which can't be adjusted out.
Last sight test - about a year ago. You?
Sure, BUT what about highly monochromatic objects.. Dayglo for example looks weird under artificial light. No UV to excite it.
If you have a three spike light source and a one spike color, you are in trouble.
But at least they have a SPECTRUM. Not half a dozen spikes scattered across one.
The LEDs probably have the best chance of
Four weeks ago.
And yes I can see the differences in TVs and even in digital photos. They are not due to holes in the spectra though, but to manufacturing tolerances. And while they can't be adjusted out on CRTs as they vary across the screen, they can on digital monitors but seldom are as it requires more processing and extra hardware and has no real benefit for most uses.
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