A Billion-Color Display

The Future of Things covered the introduction last month of HP's DreamColor display, with 30 bits/pixel, developed in conjunction with DreamWorks Animation. The display is aimed at the video production, animation, and graphic arts industries. HP promises blacker blacks and whiter whites — though TFoT quotes one source who notes that if they deliver this, it will be due to the back-lighting and not to the number of bits/pixel. No word on the size of the displays that will actually be delivered, or on the price.

Comments

It depends, but in this case about 720.

[Malekin]

Human brightness sensitivity is not even close to constant across the total range of brightness we can perceive. It varies widely over the range of colours we can see, and from person to person. Scene composition affects it, too: the shape of an object in relation to nearby objects changes our perception of its brightness. You have to consider lateral inhibition, limited integration capability, the optical modulation function of the eye, and orientation and temporal filtering, not to mention the various forms of noise that affect all parts of the vision system. The human vision system is not a camera and trying to model it as one is extremely naÃve.

With all that warning out of the way, the greyscale Just Noticeable Difference for a monitor of about 600cd/m^2 is equivalent to 720 steps.

For a 1024 steps, the monitor would need a peak intensity of around 4000 cd/m^2 to match the greyscale step increase with the statistically average human just noticeable difference.

side bar topic:

[circletimessquare]

while a billion colors is obviously ridiculous, there are people who can see 100x more colors than an average person

scientists have recently identified a very small, very rare population of women who see in 4 colors, to a total of 100 million colors

most humans see in 3 colors, about 1 million colors: red, green, and blue. a tetrachromat has an extra cone type between red and green, around orange. it's only women because the mutation requires two x chromosomes to work

read all about it, they describe a women who can look into a river and make out silting and depth levels a normal human can't, x-men mutant indeed!:

http://www.post-gazette.com/pg/06256/721190-114.stm

http://en.wikipedia.org/wiki/Tetrachromacy