The human eye, at any particular instant, can perceive contrast ratio over a range of 400:1 to 10,000:1 according to numerous references. However, the human eye is a dynamic organ and can adjust, both chemically and via iris movement, over some 30 minutes in steady light conditions to perceive higher contrast ratios of up to between 1,000,000:1and 10,000,000:1. One can think of the eye as an adaptive detector. Age is a factor influencing what contrast ratio might be perceived by the particular individual. The images displayed can affect the perceived contrast ratio with the human eye being able to detect higher contrast ratios for static images as opposed to moving images. Ambient Light Conditions Even small amounts of ambient light (one LUX - a candle flame) significantly reduces the ability of display devices to render higher contrast ratios (in the 1,000's). A black area can only be as black as whatever incident light is reflecting from it. You cannot "project" the color black. Doubly detrimental is the rapid drop off of the eyes contrast sensitivity with higher ambient light levels. Spatial Frequency The eye is sensitive to the spatial frequency which is a factor related to the distance between the contrasting image elements in relation to each degree of field of vision at the eye. Consider that the frequency is the count of the number of alternating vertical stripes of black and white across an arc of one degree with the eye as its origin. Increasing the number of vertical stripes across the arc (making them thinner) will, beyond a certain point, reduce the eyes ability to perceive contrast ratio - even though the actual contrast between the white and black stripes remains the same. For a practical demonstration of this concept try this dynamic demonstration of the eyes variation in contrast sensitivity with spatial resolution by the USD internet Psychology Laboratory. Differences in contrast ratios in the multi-thousands should only be a consideration in choosing between display devices when you are going to place them in a strictly controlled, very low ambient light environment - something like a windowless home theatre room with dark finishes on all walls and surfaces. For higher ambient light viewing environments brightness should be a much higher rated selection criteria than contrast ratio. There is no substitute for judging between the image quality of displays than viewing them side by side with your own eyes in a viewing environment with an ambient light level similar to where they would be located.
The answer is "no eye deer" (no idea).
an eye in the sky
Needle have one eye but can't see.We say the hole at the top of needle is the eye of the needle.
Eye Dance was created in 1985-10.
It means to cry; the eye is drowning in tears.
It is pleasing to the human eye.
You can perceive ten images per second by your eye. That is the reason, why you have ten images per second in case of the motion pictures. In that case you perceive that the object is in continuous motion. The human eye can see electromagnetic radiation in the frequency range 430-790 Terahertz, corresponding to colours from red to violet.
The human eye has three kinds of color receptors, which perceive red, yellow, and blue wavelengths of light. If you perceive red and yellow simultaneously, that is interpreted as orange.
There has been a breakthrough in LCD TVS recently. The Samsung LN-T4681F (AVAILABLE ALSO IN 40" AND 52") has a contrast ration of 500,000:1. Impressive. Sony also has an OLED TV with a contrast ratio of 1,000,000:1. When you get to 500,000 you see an almost perfect black. If you have a movie and the screen is black, you might think that the TV is off. When you see the 1,000,000: TV you definitely think it is off. the eye can detect any contrast ratio pretty much. But i think you mean what is the ratio when your eye simply sees black. and that is when you get beyond 500,000:1. It doesn't really get much darker and blacker than that. There has been a breakthrough in LCD TVS recently. The Samsung LN-T4681F (AVAILABLE ALSO IN 40" AND 52") has a contrast ration of 500,000:1. Impressive. Sony also has an OLED TV with a contrast ratio of 1,000,000:1. When you get to 500,000 you see an almost perfect black. If you have a movie and the screen is black, you might think that the TV is off. When you see the 1,000,000: TV you definitely think it is off. the eye can detect any contrast ratio pretty much. But i think you mean what is the ratio when your eye simply sees black. and that is when you get beyond 500,000:1. It doesn't really get much darker and blacker than that.
A human eye can distinguish about 10 million different colors.
seeing
The eye and brain perceive a holographic image due to the fact that light enters the eye. The light is then converted into information through the optic nerve.
8
I can perceive that you don't like me. Based on your sudden black eye, you may perceive that Ella doesn't fancy you. Psychologists are trained to perceive stress in their patients.
Every color that the human eye can perceive, or the human brain can imagine, or the paint manufacturer can mix, or the fabric dyer/weaver can create, is included in the visible spectrum. There is no limit to the number of them.
as different colors
The human eye can only perceive the colors from violent to red. All colors that have a wave frequency higher than violent, "ultra-violent", and have a wave frequency lower than red, "infra-red", are invisible to the human eye. Since we cannot see these colors, we do not have names for them other than their frequencies.