Video Camera

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Video Camera Details and Price in Kenya

Video cameras record live-action scenes that are available for viewing via a stored or transmitted video feed. This allows the user to create a permanent and detailed chronicle of events. Original video cameras—invented in the late 19th Century—created a "motion picture." This term is still apt today, as video cameras record dozens of pictures (or frames) a second that when viewed in succession, clearly distinguish the translation of an object or person over time. Most cameras also record audio in sync with their video capture.

Imaging Technology

Newer model video capture devices have done away with the analog film prevalent in the 20th Century. Modern devices capture images digitally, via the means of an image sensor. Image sensors turn visible light into electronic signals with information to determine the signal's organization when the picture is recreated. Digital cameras utilize an electronic shutter in most instances, since there is no need to keep a film from accidental exposure. The image captured is arranged in a grid pattern on the sensor, with each grid square called a pixel. Image sensors cannot recognize the color of light, only the level of light (or, more accurately, the number of photons in each pixel). To determine color, a filter is placed over each pixel that will only allow red, blue, or green photons to pass into the pixel. The most common type of filter is the Bayer filter, featured below. A pixel row is aligned with either a red and green, or blue and green alternating pattern. When the pixel patterns are viewed as a two-pixel by two-pixel square, the camera averages the four colors to create an estimate of the correct color. Any inaccuracy is measured as interpolation. These types of cameras use CCD, CMOS, or CID image sensing technology.

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