Removing purple and green fringing
Hey guys, can anybody share the tips how to get rid of this?
The feature for removing in C1 is not working, even after i do the reanalysis...
thx
The feature for removing in C1 is not working, even after i do the reanalysis...
thx
0
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The analysis is for chromatic aberration. There is a slider slightly lower down in the tool to remove purple fringing. BUT... you need to look at the image at 100% to see what effect it is having. The preview may still look as though there is fringing.
Ian0 -
well, the slider is on 100 and still see green/purple edges without change around white shirts edges, tree branches etc..
in LR, it was solved in 2 clicks... ☹️ too bad, that cant attach screenshot0 -
[quote="NNN636372919529824193" wrote:
well, the slider is on 100 and still see green/purple edges without change around white shirts edges, tree branches etc..
in LR, it was solved in 2 clicks... ☹️ too bad, that cant attach screenshot
And you've looked at 100%?
Ian
PS - to attach an image you need to put it online somewhere (like Flickr for instance) and put the URL of the image between Img tags.0 -
no need to zoom 😊 I can see it from default size 😊 0 -
[quote="NNN636372919529824193" wrote:
no need to zoom 😊 I can see it from default size 😊
Yes I know it’s visible at the default size. But as I tried to explain above, it will remain visible in the default size preview. You may only see the improvement from using the defringing control at 100%, because at 100% C1 will have to refer to the original raw file plus your adjustments. A similar quirk applies to things like noise reduction. And of course the correction will be incorporated into any JPG or TIFF output.
Ian0 -
[quote="Ian3" wrote:
Yes I know it’s visible at the default size. But as I tried to explain above, it will remain visible in the default size preview. You may only see the improvement from using the defringing control at 100%, because at 100% C1 will have to refer to the original raw file plus your adjustments. A similar quirk applies to things like noise reduction. And of course the correction will be incorporated into any JPG or TIFF output.
Ian
Thanks Ian, good trick, I didn't realise that.0 -
[quote="tenmangu81" wrote:
[quote="Ian3" wrote:
Yes I know it’s visible at the default size. But as I tried to explain above, it will remain visible in the default size preview. You may only see the improvement from using the defringing control at 100%, because at 100% C1 will have to refer to the original raw file plus your adjustments. A similar quirk applies to things like noise reduction. And of course the correction will be incorporated into any JPG or TIFF output.
Ian
Thanks Ian, good trick, I didn't realise that.
That is true of many things - certain colours can also be rather sensitive to how one tries to compress them by pixel binning for smaller display areas such as preview files that are set to sizes intended to reduce file size and increase performance.
Once you get down to very fine detail in an image there is every chance that there is simply not enough detail left to provide "normal" compression techniques with enough pixels to work effectively on a screen display.
Printers can deal with it because they usually have their own rules for making colour decisions and detail decisions.0 -
[quote="tenmangu81" wrote:
[quote="Ian3" wrote:
Yes I know it’s visible at the default size. But as I tried to explain above, it will remain visible in the default size preview. You may only see the improvement from using the defringing control at 100%, because at 100% C1 will have to refer to the original raw file plus your adjustments. A similar quirk applies to things like noise reduction. And of course the correction will be incorporated into any JPG or TIFF output.
Ian
Thanks Ian, good trick, I didn't realise that.
It's not a bug, it's a feature 🤓0 -
[quote="NN635299624516976000UL" wrote:
[quote="tenmangu81" wrote:
[quote="Ian3" wrote:
Yes I know it’s visible at the default size. But as I tried to explain above, it will remain visible in the default size preview. You may only see the improvement from using the defringing control at 100%, because at 100% C1 will have to refer to the original raw file plus your adjustments. A similar quirk applies to things like noise reduction. And of course the correction will be incorporated into any JPG or TIFF output.
Ian
Thanks Ian, good trick, I didn't realise that.
It's not a bug, it's a feature 🤓
No, I didn't think nor say it was a bug !! I just didn't realise that !! And actually, I remember I have tried sometimes to suppress purple fringing without 100% zooming.... and thus with a mitigated result 🤭0 -
Capture One's purple fringing tool still isn't strong enough to really do the job though. I have a Nikkor 85mm f1.8 that fringes terribly if the focus isn't perfect and there's a bright object. Using the purple fringing slider only takes out about 1/3 of it. So I usually have to make a new layer to desaturate the specific color to make it go away completely. 0 -
I second that, the purple defringing slider has very little effect. And that is strange, as defringing was always one of the strengths of C1. I remember from old versions (where I believe it was just an on-off check-box) that you could just leave it on by default and never had to worry about purple fringing. It was much better than Lightroom at that time.
But it seems this has turned around. For this reason alone, I just downloaded Lightroom again, and although the 'generic' default is there not as good as in C1, pulling the slider out eliminates quickly 100% of the fringing, and not 30% like C1.
Somehow along the line, this must have been a deliberate choice from PhaseOne to go for such a weak effect. What could have been the reason for that? And why introduce a slider if 100% of the slider only gives you 30% of the effect.0 -
It's always seemed like the purple fringing slider was really blurring the a and b channels in Lab, and it does seem less effective than years ago, but it also used to smear saturated colors in other parts of the image. For me, it was alway easier to do that in Ps anyway. 0 -
I have an old manual lens that in certain situations can produce extreme purple fringing.
C1 will deal with it well most of the time but not always completely.
One simple approach is to add a Colour Editor adjustment for the offending purple colour range and then save it as a Preset.
You can then quickly "top up" the purple adjustment with the preset or, if that might adversely affect some required colours in the image, use it for an adjustment layer - either a general layer or one that makes use of a colour selection mask.
How you choose to adjust the colour is, of course, up to you. The quick and easy option is desaturation but that may not always work exactly how you wish. But for a fast fix it usually offers some benefit.
Grant0
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