wie erzeugt amn HD Fotos
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Re(15): wie erzeugt amn HD Fotos
21.08.2010, 16:33:23

macht das da überhaupt sinn?bei animationsfilmen wird ja sowieso meistens
komplett animiert da von hdr zu sprechen is denke ich nicht im sinne des
urhebers


In der Natur kommen sehr große Kontrastunterschiede vor. Wie willst du die mit 8-Bit pro Farbe berechnen?

Aus Wikipedia:

One of the primary advantages of HDR rendering is that details in a scene with a large contrast ratio are preserved. Without HDR, areas that are too dark are clipped to black and areas that are too bright are clipped to white. These are represented by the hardware as a floating point value of 0.0 and 1.0 for pure black and pure white, respectively.

Another aspect of HDR rendering is the addition of perceptual cues which increase apparent brightness. In the HDR rendering on the near right, the bright light from the outside casts a blue glow where it enters using light blooming, allows details underwater to be seen, gives the scene more vibrance, and the darker parts of the scene have similar amounts of detail compared to the low dynamic range image. In the LDR render (the right image), there is no light blooming where the light enters from, and the overall scene looks dull and unrealistic.

HDR rendering also affects how light is preserved in optical phenomena such as reflections and refractions, as well as transparent materials such as glass. In LDR rendering, very bright light sources in a scene (such as the sun) are capped at 1.0. When this light is reflected the result must then be less than or equal to 1.0. However, in HDR rendering, very bright light sources can exceed the 1.0 brightness to simulate their actual values. This allows reflections off surfaces to maintain realistic brightness for bright light sources.


21.08.2010, 16:36 Uhr - Editiert von hellbringer, alte Version: hier
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