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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.
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∙ 15y ago
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What contrast ratio can the Human eye perceive?
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.
Compare and contrast eye descriptions in The Giver and The Outsiders?
never mind?
Why is the golden ratio considered the ideal ratio?
It is considered that a shape, eg. Rectangle, with the golden ratio looks "most pleasing to the eye".
Why is the golden ratio used in art and architecture?
It is pleasing to the human eye.
Was Theodore Roosevelt ugly?
No he wasn't. Beauty is in the eye of the beholder. He was a dynamic and rivetting speaker and so was certainly interesting.
Why do you need to regulate the amount of light in the microscope?
Too much light overwhelms the eye's ability to distinguish contrast and therefore detail in the specimen. Microscopes therefore have the ability to reduce the amount of light impinging on the specimen using a diaphragm, rather like the iris of the eye does.
What requires high contrast setting?
Some lenses are very low in quality and therefor low in contrast! That's right, the lens is responsible for how much contrast your picture will naturally have. Catadiopric Telephoto Lenses are known to have very low contrast, so boosting your contrast on your camera helps a lot!
How do conditions differ in eye and eye wall zones?
Conditions in the eye are relatively calm and there is usually no rain. The clouds may even disappear, leading to a clear sky. Air in the eye moves downward. By contrast the eye wall contains the strongest winds of a hurricane and torrential rain. Air in the eye wall moves upward.
How you can take care of your eye and your camera?
for your eye do not rub to much of your eye
How much money did Eye for an Eye gross worldwide?
Eye for an Eye grossed $26,792,700 worldwide.
Is it possible to get effects on your acer crystal eye webcam?
it is possible if you click on the `video enhancement' button in the bottom left hand corner and change the contrast button or the brightess button its not much but its better than nothing :) hope it helps
How much money did Eye for an Eye gross domestically?
Eye for an Eye grossed $26,792,700 in the domestic market.
