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Explain false colour composite and true color view?
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Sajan sarthak
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False color composites allow us to visualize the wavelengths the human eye does not see (near the infrared range). The use of bands, such as near infrared, increases spectral separation and can enhance the interpretability of data. False color images are a representation of a multispectral image created using ranges other than visible red, green and blue, such as red, green and blue image components. There are many different false color compositions that can distinguish many different functions. This combination is used to obtain pseudo-natural colors under certain conditions when the image is visualized similar to the natural one and allows you to analyze the atmospheric haze, the state of suspensions in the atmosphere, its smoke. Vegetation is visible in shades of green, urbanized areas are represented by white, gray, or purple, and soils, sand, and minerals are shown in a variety of colors. Due to the almost complete absorption of solar radiation in the middle IR range by water, snow, and ice, coastlines and water objects are well distinguished. Snow and ice appear as dark blue, and water as black or blue. Flooded areas are a very dark blue and almost black, whereas in composition 3-2-1, shallow flooded areas are gray and difficult to distinguish. One application of this combination is the monitoring of forest fires. Surfaces with elevated temperatures, such as forest fires and calderas of volcanoes, saturate the image in medium IR channels and are displayed in shades of red or yellow.
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Rahul kumar Best Answer
True color and False color composites are two different types of view that are used to gather information in Remote sensing data. False color composites are a representation of a multispectral image produced using any bands other than visible red, green and blue as the red, green and blue components of the display. False color composites allow us to visualize wavelengths that the human eye can not see (i.e. near-infrared and beyond). Using bands such as near infrared highlights the spectral differences and often increases the interpretability of the data. There are many different false colored composites that can be used to highlight different features. See the heading below for more information about common band combinations for false color composites. A natural or true color composite is an image displaying a combination of the visible red, green and blue bands to the corresponding red, green and blue channels on the computer display. The resulting composite resembles what would be observed naturally by the human eye: vegetation appears green, water dark is blue to black and bare ground and impervious surfaces appear light gray and brown. Many people prefer true color composites, as colors appear natural to our eyes, but often subtle differences in features are difficult to recognize. Natural color images can be low in contrast and somewhat hazy due the scattering of blue light by the atmosphere.