Why is webcam video grainier and fuzzier when the room is dark?
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Webcams, like any other camera, use light to capture an image. In a well-lit room, there is enough light for the webcam to capture a clear and detailed image. However, when the room is dark, there is less light available for the webcam to capture the image.
To compensate for the lack of light, webcams will increase the sensitivity of their sensors or adjust the exposure time, which means they keep the shutter open longer to allow more light in. These adjustments can lead to an increase in image noise or grain, which appears as fuzzy or pixelated areas in the image.
Also, in low-light situations, webcams will also use digital “noise reduction” techniques to try to smooth out the image. However, this can also result in a loss of detail and a fuzzy appearance.
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