Tutorials DxO PhotoLab by the user

Started 2 months ago | Discussions thread
IanYorke Veteran Member • Posts: 3,299
Re: Tutorials DxO PhotoLab by the user
1

Ernie Misner wrote:

Thank you for this thread and DXO tutorials. I will definitely bookmark and read.
I am a bit baffled by some of the local adjustments. The control point can not be made large enough to cover an image with my 7000px files for a global adjustment?

And how do I remove parts of a control point adjustment? The dialog box says to use Alt+click for a minus type control point but all that comes up is a control point just like the original?
Why can't the adjustment brush be used to remove parts of a control point adjustment? And is there no way to turn the + brush into a - brush? Holding Alt does nothing.
There is the Eraser tool but it is SO tiny and it does not seem to work with a control point.

Thank you again.

Hi Ernie

The control points are for local, not global adjustments. When you add a control point a mask is automatically produced based on the colour and texture of the pixels under the control point. Press the M key (Win) to see the mask.

The control circle is not an absolute limit to the adjustment range as the adjustments will extend beyond the circle but with reduced intensity. The idea is that not all pixels are impacted by the adjustments as with a standard mask. This gives a more organic change to the image with no hard boundaries. There is another thread that discusses tips for DXO Photolab which may help:

DXO-PL 2 Tips – DP Review

https://www.dpreview.com/forums/thread/4347396

This video will also help:

U-Point Technology

https://www.youtube.com/watch?v=lxWwizmvNyA

With the mask displayed by the control point if you hold down Alt and click to add a point you add a negative control point which samples the pixels under the negative control point and tells the normal control point to not impact these pixels.  NIK technology is very different to traditional masking but is easy to use once you get a better understanding of what is going on.

Negative control points are used to effectively erase parts of the control point mask as explained above.

Hope this helps.

Ian

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