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Posted

Hi

I'm merging three ARW (Sony) images into a new HDR.  All seemed to be going well until I zoomed in and saw a multi line red halo around high contrast edges, particular where the object meets the sky.  I've also tried this on another set of 3 images shot from the same location with similar results.

I've tried the merge both with and without 'noise reduction' ticked, and with and without 'remove ghosting'.  I've also tried the different alignment options.  No combination seem to make any difference to the halo effect.

Have you come across this before and know what the cause is, or have any hints as to how I can remove it post merge?

I'm using the latest version of Affinity Photo v2

image.png.052b8f26b1ff6e90f05c4b4be183d425.png

 

DSC01187.ARW DSC01188.ARW DSC01189.ARW

Posted

Just tried this and used these settings...
image.png.bbc2addf84a19ed90b5df6a623531c92.png

Then used the Filters > Colour > Chromatic Aberration to remove the magenta fringing.
image.thumb.png.f1a6405cd7582379ea4c16ff56227f99.png

 

Chromatic Aberration applied. 

image.png.5599a9644e1b13b7dd24543b567476db.png

It looks to be the tone mapping option that is causing the problem so turn that off, you can always tone map afterwards. You can also use the Defringe live filter to use a nondestructive edit, try using these settings to remove the magenta cast on the edge.

Screenshot2024-01-08at17_59_56.png.575ec05366070a45c9c294ea18f494d1.png

iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9  
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Posted

Thank you.

I've just been trying that out and I can't quite get rid of the halo completely but I have been able to reduce it.

It seems that maybe the three images weren't perfectly aligned and then when tone mapping happened it made things worse.

I'll try different options and see what works best at each stage to try and minimise the effect.

Thanks for the pointers again.

Paul

Posted

Thought I'd have a go with Photomatix Pro and the results are very similar to Affinity Photo's with tone mapping enabled, the images are not aligned and I think the complexity of the background is making it difficult to make a good alignment, hence the rippled edge.

Was this shot on tripod?

iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9  
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Posted

Unfortunately not a tripod shot.  It was manic there and actually a queue to take the shot from this angle as it's one of the few spots available.

I set the camera on auto 3 shop bracketing on one shutter press, but there may have been an ever slight difference in alignment as it was handheld.

As suggested above, I've now found that putting it through the tone persona manually (not ticking that box) and being far more subtle that the default 'Normal' option, followed by careful use of the live defringe tool in Photo Persona an acceptable result.

There's still a little visible on close inspection but not unless you go looking for it.

Paul

House of commons from Westminster bridge landscape.jpg

Posted

Hand held, that's pretty good to be honest, so well done.

iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9  
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