My eyes arent calibrated what if I see more green than others, I would want the screen calibrated so I see accurate colours not the screen is outputting accurate colours.
Also I've found I have to adjust brightness between some movies, so that shows the disc varies, and kinda defeats the point of calibration. If your screen is brightness calibrated and you cannot adjust it when you watch a buggered brightness movie whats the point?
It's fine cooying basic controls and post processing, and colour temp from others. But not CMYK colour decoder, 9/21 point grey scale.
How you perceive colours may well be different from the next person, but it's consistent for you and the way you see the world. All we're asking from TV calibration is for the display to reflect what we would see in real life, or as close to it as we can get with the current level of technology.
Put it another way, you don't ask plants or signs or the sky to change their colour to accommodate your particular sensitivity to the various frequencies of light waves, do you? No, you accept the world as it is. The screen should do that too.
The colour of light is a measurable quantity, just as an audio tone is measurable or a distance is measurable or a weight. A colour sensor for TV calibration can measure those wavelengths and, in an objective way, show us how close the screen gets to accurately displaying the same wavelengths of colours that occur in real life.
The difficulty for all of us is that our brains interpret and adjust our perception of colour for a wide variety of lighting conditions based partly on our expectation of certain reference points. Remember, colour is the reflection of certain frequencies of light the light bouncing off an observed object. A plant isn't green because '
plants are green'. It's a particular shade of green because when hit with white light, all the rest of the colour spectrum is absorbed. Only the green spectrum of light is reflected. Take that same green-looking plant in to a darkroom where the developing light is red, and the plant will look black and not green. That's because there's no green light available for it to reflect.
Part of the reason why so many people put up with bad colour on TV is because there's a disconnect - a cognitive dissonance, if you will - between real life and what they'll accept once people and objects move about in the magic light-box in the corner of the room (or over the fireplace
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
). To give a real life example of that, think about photography.
Say you went on a skiing holiday, and took a nice shot of your girlfriend (lots of assumptions there, I realise; but just go with it). What you saw on the day was this...
But when you check the image on the phone screen later that night, what you see is this...
By this time you've already posted the picture on social media and got lots of likes. No one has come back saying that the colour looks odd. They weren't there, so they all accept the bluer picture with boosted red as what you saw when taking the shot.
They haven't got a reference to what the shot really looked like, and they don't look at the skin tone and think "she looks a bit magenta; that's not right, surely?" Yet they do exactly the same with their TVs when setting the colour tone to Cool to make whites appear brighter, and then try to fix the lack of a proper flesh tone by increasing the colour setting.
Part of the reason why we'll accept inaccurate colour is because our brains are very good at adapting to the colour of light under which we are seeing things. We have reference points, and then adjust our perception to match. White is a good example. The colour of light changes during the day. In the morning there's more blue in it due to Doppler shift, so the light hitting and reflecting off a white object gives it a bluer tint, but our brains adjust out that colour cast so we see bluey-white as our normal white. By midday, or when the sun is overhead, the colour tone of the light is what we perceive as more neutral. In fact, before colourimeters and spectroradiometers, the reference for daylight colour filming was midday sun directly overhead in Hollywood. That gave us 6500 Kelvin.
Towards the end of the day the colour of light is going towards red. I don't know about you, but when I think of evening sun I'm reminded of those summer holiday sunsets where everything takes on a warmer glow. Again though, I still perceive white as white. It doesn't look overly red, even though there's far more red in the colour of light bouncing off any white object.
Put the cognitive dissonance and our adaptability together, and you've got a reasonable summary of why the colour on most people's TV s is screwed up. There are lots of other contributing factors of course, but this will do for a quick-and-dirty explanation.
When someone has their TV professionally calibrated, much of the fake colour balance issues go away. Colours are rendered far more precisely, and each subtle colour variation has its own space which helps make it distinct from its neighbours. This results in a feeling that there's more detail in the picture because suddenly everything in the image becomes distinct.
The reason you're having to adjust the brightness between discs could be that your lighting level has changed; but if its consistent, then the other reason is that your screen isn't set up properly.
Yes, there may well be a bit more detail to see in the shadow areas of the picture if you tweak the brightness up, but that doesn't mean to say that you were meant to see it. Once you've tweaked up, maybe the next disc or even the next shot looks slightly washed out. You're forever riding the brightness control instead of setting the image to the reference level for black under daylight or night-time viewing conditions and then leaving it there.
You have the test discs. Why not make use of them?