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| author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2017-12-01 10:32:14 +0100 |
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| committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2017-12-01 10:32:14 +0100 |
| commit | 4097e27114d227692d53c5d28487e12a3833cd24 (patch) | |
| tree | d5c2a62c4db97de94f92150340612c64d3997669 /doc/inoutreferred.html | |
| parent | f8a0a4e1c775a90c313cb83201eec4cea4e9a7da (diff) | |
| parent | 5514d94483c98e3320b202b1bb882023a7d12027 (diff) | |
Merge branch 'feature/upstream' into develop
Diffstat (limited to 'doc/inoutreferred.html')
| -rwxr-xr-x | doc/inoutreferred.html | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/doc/inoutreferred.html b/doc/inoutreferred.html new file mode 100755 index 0000000..41a3fd5 --- /dev/null +++ b/doc/inoutreferred.html @@ -0,0 +1,48 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<html> + <head> + <title>Input vs. Output Referred images</title> + <meta http-equiv="content-type" content="text/html; + charset=windows-1252"> + </head> + <body> + <h2 style="text-decoration: underline; font-weight: bold;">Input vs. + Output Referred Images<br> + </h2> + A lot of Photography related sources recommend that images be + encoded in a large gamut colorspace such as ProPhoto, but don't + explain the implications of doing this in in the process of + subsequently displaying such photo's. <br> + <h3> Input referred:</h3> + Images are encoded in a way that represents their unchanged or + originally captured values, in an encoding space that is larger + enough to store their gamut without clipping. The gamut of the + encoding space tells you nothing about the gamut of the images.<br> + <br> + Typical: L*a*b*, Raw, ProPhoto, RIMM etc.<br> + <h3>Output referred:</h3> + Images are modified (i.e. rendered) to fit within the gamut of a + specific real world output device (such as display or printer). This + means that typically the encoding space is a good representation of + the gamut of the images.<br> + <br> + Typical sRGB, AdobeRGB, printer profile, display profile, etc.<br> + <br> + <br> + Before displaying images that are Input Referred, they need to be + rendered to a smaller gamut. This may be done manually by adjusting + the images carefully to fit within the smaller gamut, or in some + automatic fashion such as by hard clipping them to the smaller + gamut, or by setting up a specific gamut mapping for each image or + set of images that occupy a similar gamut.<br> + <br> + <u><b>Note</b></u> that setting up a gamut mapping from the very + large Input referred encoding gamut to the smaller output device + gamut will almost certainly result in a disappointing loss of + saturation, because the images deliberately do not occupy the large + encoding gamut, and so get unnecessarily squashed down to allow for + colors that they do not actually contain.<br> + <br> + See also Scenarios.html#LP3.<br> + </body> +</html> |