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An L.A. law firm is suing Apple for false advertising. What's the claim? Apple says their new iMac monitors display "16,777,216 colors," but the modern-day Susan Dey, Harry Hamlin, et al. say the real number is a measly 262,144.
While we recognize false advertising sucks, we're curious about the actual numbers from a practical point of view. Photography experts, please sound off: does the human eye actually notice such things? This isn't a challenge, we're simply curious to hear your opinions.
I will say, I do remember having a box of Crayola Crayons as a child with 16 colors. For my eighth birthday this was replaced by a box of 64 colors, and it was like whoa--too many! Burnt Sienna, I apologize for not giving you your due.
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Comments
Physiology text book to the rescue!
200 gradations of hue x 20 levels of saturation x 500 levels of brightness = 2 million gradations
One must assume these numbers are approximate, but the eye is physically capable of detecting a lot more than 200,000 colors. On the other hand, it would not be capable of detecting the advertised number anyway.
With iMac's screen resolution, simply making a horizontal vector graphic gradation across the entire screen (like blue to red) would make the difference between 32bit full colour and 16bit pretty obvious.
I mean, it's apparent even on my MBP laptop screen.
The ability to detect color differences is more pronounced in some areas of the spectrum than others. Darker and less saturated colors tend to show more banding.
The root of the problem is that the eye responds to color logarithmically, not linearly, and displays/color spaces are mostly linear. There are some perceptual color spaces, but they're computationally more difficult, and are generally not used outside of research.
ha! Interesting post...I'd love to hear a few answers to that one!
As long as leds can produce 256 shades, the law firm is wrong and Apple has no reason not to advertise with it.
I sure hope they understand the difference between colors a monitor can produce and the colors the human eye/brain can distinguish...