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Tone mapped high-dynamic-range (HDR) image of St. Kentigerns Roman Catholic Church in Blackpool, Lancashire, England, UK. Tone mapping is a technique used in image processing and computer graphics to map one set of colors to another to approximate the appearance of high-dynamic-range (HDR) images in a medium that has a more limited dynamic range.
This tone mapping is done relative to what the virtual scene camera sees, combined with several full screen effects, e.g. to simulate dust in the air which is lit by direct sunlight in a dark cavern, or the scattering in the eye. Tone mapping and blooming shaders can be used together to help simulate these effects.
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The display device then uses the dynamic metadata to apply an appropriate tone map through the process of dynamic tone mapping. [20] Dynamic tone mapping differs from static tone mapping by applying a different tone curve from scene-to-scene rather than use a single tone curve for an entire video. [21]
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A key application of dodging and burning is to improve contrast (tonal reproduction) in film print-making; today this is better known as tone mapping in digital photography – see high-dynamic-range imaging.
A Continuous tone map represents a continuous field as smoothly transitioning color (hue, value, and/or saturation), usually based on a raster grid. Some have considered this to be a special type of unclassified isarithmic map, while others consider it to be something fundamentally different. [7]
In the theory of photography, tone reproduction is the mapping of scene luminance and color to print reflectance or display luminance, [1] with the aim of subjectively "properly" reproducing brightness and "brightness differences". [2] The reproduction of color scenes in black-and-white tones is one of the long-time concerns of photographers. [3]