Describe a dim lit room

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Describe a dim lit room

Basically, one major difference between the images is that your noise sources in the image is vastly different.

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Because the noise is different and because its contribution is different with regard to exposure, the obtained images are quite different. Think of your camera detector as a well that measures electrons. That well captures either light photons which is converted to "good" electrons or "bad" parasitic electrons that are caused by system noise camera.

With the room lit, the light signal is vastly greater than the dark current, your system dominant noise is a different noise source called shot noise. Its very interesting, and its root is related to quantum mechanics and if you have the time and curiosity, you can also read about it in wikipedia.

Your Answer

The main difference, with regard to your question, is that the shot noise is proportional to the square root of the input signal. This means that for low light, once you are shot noise dominated, increasing the exposure would increase the signal more than the noise, which is desired if you want to capture the actual details in the scene.

This is a very important distinction and for this reason, a camera designer would always want his system to be shot noise limited when possible in order to obtain the best signal to noise ratio.

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Define dimly. dimly synonyms, dimly pronunciation, dimly translation, English dictionary definition of dimly. adj. dim·mer, dim·mest 1. a. Lacking in brightness: a dim room. b. Emitting only a small amount of light; faint: a dim light bulb.

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But so do a lot of other external factors, from your mood to room lighting. Here, a guide to enhancing the pleasures of the plate. What lighting condition does the spell Darkness create? Ask Question. Except "Shadowy Illumination" is the official phrase to describe dim lighting, as quoted above.

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Describe a dim lit room

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