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What is contrast ratio?

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What is contrast ratio?

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For any avid TV watcher, one of the things that make a picture more attractive is its contrast ratio. The contrast ration is a simple concept, but it can greatly benefit the display of a picture on a TV set. The contrast ration is generally defined as the difference between the brightest color (which is white) and the darkest color (which is black).

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The contrast ratio is a measure of a display system, defined as the ratio of the luminosity of the brightest color (White) to that of the darkest color (black) that the system is capable of producing. These measures are both expressed in candelas. For example, a monitor with a white at 250 cd/m, and a black at 0.50 cd/m has a contrast ratio of 250 / 0.50 = 500 : 1. A high contrast ratio is a desired aspect of any display, but with the various methods of measurement for a system or its part, remarkably different measured values can sometimes produce similar results. Their are two methods for measuring contrast ratios: Full On/Off and ANSI contrast. • Full On/Off contrast measures the ratio of the light output of an all white image (full on) and the light output of an all black (full off) image. Most manufacturers favor the use of the full on/full off method of measurement because it yields a much higher contrast ratio than ANSI contrast measurements. • ANSI contrast is measured with a p

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The technical definition of contrast ratio is the ratio of the luminance of the brightest color (white) to that of the darkest color (black) that a system is capable of producing. In more simple terms, the contrast ratio is the difference between the brightest pixel and the darkest pixel that a television can produce. Darker blacks make bright colors seem brighter, so enhancing the dark values of a television can have just as much influence on contrast as enhancing bright values. Theoretically, a television with a contrast ratio of 1000:1 would mean that a bright white pixel is 1000 times brighter than the darkest black pixel. Types of contrast ratios Contrast ratio is tricky to measure, as the measurement may be based on either the static contract ratio or the dynamic contrast ratio. Static contrast ratio is the contrast ratio at a specific instant, or how it would look if you could freeze a frame of the image. Dynamic contrast ratio is measured over a period of time and usually invol

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Contrast ratio is the ratio of intensity between the brightest white and the darkest black of a particular device or a particular environment. Projected cinema film – or a photographic reflection print – has a contrast ratio of about 80:1. Television assumes a contrast ratio – in your living room – of about 30:1. Typical office viewing conditions restrict the contrast ratio of a CRT display to about 5:1.

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Contrast ratio: This is the difference between the whitest whites and the darkest grays a display can show or re-produce on screen. A higher contrast ratio makes it possible to display deeper blacks and more subtle color detail. Good contrast is critical for home theater projectors. In fact, many models include multiple lamp settings that let you reduce brightness and boost contrast ratio for optimum viewing in a darkened room.

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