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Minor documentation update to make it easier to understand. No changes to actual constants.

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torger
2013-11-11 14:18:14 +01:00
parent b1ed94639a
commit 1af69dbbae
1 changed files with 12 additions and 12 deletions
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24
rtengine/camconst.json Normal file → Executable file
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@@ -262,18 +262,18 @@ the output). When you load a file you will see a message of current black
and white levels and if they came from dcraw or camconst.json. If you're and white levels and if they came from dcraw or camconst.json. If you're
adjusting an existing camconst.json value you can just read what it is in adjusting an existing camconst.json value you can just read what it is in
the file and not need to enable verbose output. Reset exposure sliders to the file and not need to enable verbose output. Reset exposure sliders to
neutral, and zoom in on a clipped highlight. Move around the mouse pointer, neutral, and zoom in on a large clipped highlight. Move around the mouse
it should show stable 100% on R G B. If so, the white level is not too high, pointer within, it should show stable 100% on R G B. If so, the white level
it could however be too low. To test that, go to the raw tab and adjust the is not too high, it could however be too low. To test that, go to the raw tab
"whitepoint linear correction factor", reduce it until one of the channels and adjust the "whitepoint linear correction factor", reduce it until one of the
is no longer 100%, and then increase 0.01 so all are 100 again. Usually you channels is no longer 100%, and then increase in steps of 0.01 until all are 100
play around in the range 0.90 to 0.99, ie very small adjustment. Then divide again. Usually you play around in the range 0.90 to 0.99, ie a very small
the original white level with your adjustment to get a new larger white level, adjustment. Then divide the original white level with your adjustment to get a
which you then enter in your camconst.json file. The same procedure can be new larger white level, which you then enter in your camconst.json file. The
used if the white level is too high, ie if you see pink highlights, then same procedure can be used if the white level is too high, ie if you see pink
increase the correction factor above 1.0 until you just start seeing stable highlights, then increase the correction factor above 1.0 until you just start
100% on all channels, and then divide the original white level to get a new seeing stable 100% on all channels, and then divide the original white level to
smaller one. get a new smaller one.
*/ */
{"camera_constants": [ {"camera_constants": [