2.2 Merging the images into an HDR image.2.1 Capturing multiple images (exposure bracketing).In photography, dynamic range is measured in exposure value (EV) differences, known as stops.

It can be applied to produce images with preserved local contrast or exaggerated local contrast for artistic effect. This method reduces the overall contrast of an HDR image to facilitate display on devices or printouts with lower dynamic range. The method of rendering a high dynamic range image to a standard monitor or printing device is called tone mapping. The technique can also be used to capture video by taking and combining multiple exposures for each frame of the video.Дue to the limitations of printing and display contrast, the extended luminosity range of input HDR images has to be compressed to be made visible. Many smartphones have a built-in HDR feature performing the process in a automated way for photo capture. The term 'HDR' may also refer to the overall process of capturing HDR images from multiple exposures. HDR is useful for recording many real-world scenes containing very bright, direct sunlight to extreme shade, or very faint nebulae. Combining several different, narrower range, exposures results in an image with a greater dynamic range than what is possible by taking one single exposure. The ratio between the maximum and the minimum of the tonal value in an image is known as the dynamic range. Outside this range, no features are visible because everything appears pure white in the brighter areas and pure black in the darker areas. Images captured by cameras allow differentiation only within a certain range of luminosity. In photography and videography, multi-exposure HDR capture is a technique allowing to capture high dynamic range (HDR) images by taking and then combining several different exposures of the same subject matter.

Kentigern's Church in Blackpool, Lancashire, England Tone mapped high-dynamic-range (HDR) image of St.

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