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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
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
neutral, and zoom in on a clipped highlight. Move around the mouse pointer,
it should show stable 100% on R G B. If so, the white level is not too high,
it could however be too low. To test that, go to the raw tab and adjust the
"whitepoint linear correction factor", reduce it until one of the channels
is no longer 100%, and then increase 0.01 so all are 100 again. Usually you
play around in the range 0.90 to 0.99, ie very small adjustment. Then divide
the original white level with your adjustment to get a new larger white level,
which you then enter in your camconst.json file. The same procedure can be
used if the white level is too high, ie if you see pink highlights, then
increase the correction factor above 1.0 until you just start seeing stable
100% on all channels, and then divide the original white level to get a new
smaller one.
neutral, and zoom in on a large clipped highlight. Move around the mouse
pointer within, it should show stable 100% on R G B. If so, the white level
is not too high, it could however be too low. To test that, go to the raw tab
and adjust the "whitepoint linear correction factor", reduce it until one of the
channels is no longer 100%, and then increase in steps of 0.01 until all are 100
again. Usually you play around in the range 0.90 to 0.99, ie a very small
adjustment. Then divide the original white level with your adjustment to get a
new larger white level, which you then enter in your camconst.json file. The
same procedure can be used if the white level is too high, ie if you see pink
highlights, then increase the correction factor above 1.0 until you just start
seeing stable 100% on all channels, and then divide the original white level to
get a new smaller one.
*/
{"camera_constants": [