Using SCC in HDR with 12 colours

[Jossie]

Dear Mr. Ketelhohn,

Since the expert mode of the selective colour correction using 12 colours is not covered by the sparce online documentation I would like to ask for advice here on how to use this tool. I have arranged screenshots to visualize what my problems are.

Figure 1
Marking the shirt in the area circled in red I get the colour wheel shown at upper left, which has a brown sector at the 2 o'clock position instead of an orange sector. Although I have selected 12 colours, the colour wheel shows only 6 colours which can be changed with the mouse. Do I have to use the red (3 o'Clock position) and the yellow (1 o'clock position) in combination or what am I supposed to do to change the orange colour?

Figure 2
In the colour matrix field in the lower part only every other column has a pull-down menu offering various possibilities to change the colour. Is there only the possibility to enter values manually in these columns without pull-down menu or how do I get the pull-down-menu for all columns?

Figure 3
Activating the second column in the matrix (green dot) the colour wheel now shows an orange sector at exactly the same position as above in figure 1. With the same values in the matrix and the same position in the wheel why do I get two different colours in the sector?

Figure 4
Having coupled the left three columns in the matrix I want to increase their brightness together. How do I do that in the matrix? If I use the pull-down menu, only the yellow column is changed. Does this work only for the HSL sliders in the upper part?

Figure 5
The L-slider has been used to increase the brightness of the three left hand columns in the matrix.

Figure 6
Resetting the matrix and activating the second column (orange) results in the same colour as in figure 5 when the L-slider is moved up. How can the colours be the same if the matrix content of the three lefthand columns is quite different? Obviously I am misunderstanding something here.

Many thanks in advance and best wishes

Hermann-Josef Röser

[LSI_Ketelhohn]

Dear Mr Röser,

Pull down menus are only available for the RGB and CMY values the other 6 colors can only be manipulated manually.

If you pick a color from the picture that color will be used for the color wheel. If you want to use orange as a base you can select it by clicking the little green indicator below the color matrix as you have already found out yourself.

The wheel can only show one color at a time.
If you move the L slider all three selected colors are adjusted. The pull down menus always only effect their column.

Sorry but the figures 5 and 6 quite obviously do not show the same values.

Kind regards,
Arne Ketelhohn.

[Jossie]

Dear Mr. Ketelhohn,

so the 12-colour option is not really a fully functional extension of the 6-colour option ...

The wheel can only show one color at a time.

Yes, that is trivial. But why is it orange in one case and in the other brown, with everything else in the dialog being the same??? By the way, it would help to give a number specifying the azimuth angle of the cone so one can read off, if two colours are identical or not.

Sorry but the figures 5 and 6 quite obviously do not show the same values.

But they are very, very close: (166,112,69) compared to (169,112,69) according to the colour picker. But the numbers in the matrix differ by a lot more!

Hermann-Josef Röser

[LSI_Ketelhohn]

Dear Mr Rösern,

No it is, it functions as intended.
Sorry I can not see any issue here.

Kind regards,
Arne Ketelhohn.