Often, defining either positive or negative control points, a circle is not always the best shape. For example, if I want to affect a rectangular building, a circular positive mask often means I have to apply lots of negative masks to limit the effect to the rectangle. The same principle applies to negative masks, where they can often overlap a positive area by too much or need quite a lot of negative masks to effectively mask a rectangular positive area.
My suggestion is that we should be able to choose the shape of the control point mask.
It would certainly be useful but could be a UX challenge. In drawing apps, ellipses are drawn by dragging the corner of a bounding rectangle, where a control point is manipulated by grabbing the (circle) shape itself. How does one drag the edge of an ellipse in a sensible fashion?
My concern about this proposal, Joanna, is that it would probably reinforce the oft seen misunderstanding that the shape of a U-point’s “area of influence” somehow determines the area selected by the U-point … esp. for new users coming from other applications.
And the fact this this has received 15 votes (at time of writing) suggests to me that this is already the case !
Control points are a very powerful tool.
The problem in PhotoLab is poor implementation: The worst of all known software with this technology.
Last week I installed Snapseed on my smartphone. Even in this free app, the selection of control points is much better.
I continue to argue that the implementation of control points in a PhotoLab should be fundamentally rewritten. Until that happens, I will continue to use this technology in Capture NX2.
In the topic for the most desired updates in the PhotoLab, I already wrote that this is one of the most desired improvements in the PhotoLab 5. This will be one of my arguments whether to update to PhotoLab 5.
P.S .: I have been working with control points for more than 10 years, so I think I know the technology well enough …
I don’t doubt that’s the case for you, Sigi … but I’ve seen a lot of posts in the time since Control-Point technology was introduced in PL where it’s obvious that it’s not understood. (And I remember this being a learning process for me too - in the early days of PL’s Local Adjustments).
Yes, that’s my experience too - but I find U-points quite easy/simple to use when “M” (for mask) is applied to reveal the actual area(s) of selection - and helping show to where negative U-points are needed.
Absolutely - - I agree with you wholeheartedly on this need.
Maybe I am exactly the type of person you are talking about but I do not agree with that statement.
In the below, extreme, example the affected areas are very obviously circles. Because the strength of the effect varies by linear distance from the control point, the circle shape has a significant effect on the result.
I know that the effect is tone-specific, but even then, areas of the selected tone that are near the edge of the circle are less affected than those closer to the centre. With an elliptical control point, the strength would be increased further in absolute terms along the major axis than the minor axis.
Furthermore, sometimes one wants the effect to avoid an area of the photo that has the same tone and requires negative points to achieve this. Having a more malleable area of influence would reduce the need for negative points in some cases.
The single biggest improvement to understanding of control points, in my mind, would be to somehow promote the “show masks” checkbox so people will naturally want to click it.
I agree wholeheartedly. I also still use the control point technology in Capture NX2, which i find much more intuitive in defining the area of impact compared to the control point implementation in DXO.
I use to be very frustrated by the strength of the effect dropping off with distance. I often had far more selection points than I wanted and found that I was getting spotting that was unacceptable. I eventually realized that in most instances if I just make the circles MUCH bigger it solved the problem. In this example it was just a few clicks to isolate the plane from the blue sky.