Fringing - how to combat it?
Fringing - how to combat it?
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CommanderJameson

Original Poster:

22,096 posts

257 months

Tuesday 16th October 2007
quotequote all
Here's an HDR (3 bracketed frames at +2, 0 and -2 EV stops) picture I took of Barnard Castle:



Have a look at the white house to the middle right of the picture, and observe the fairly hideous purple fringing that has come in from the +2 EV frame.

Bearing in mind that my camera is a PowerShot S3, what can I do to minimise or remove this horribleness?

I've got PhotoShop Elements and iPhoto at home - so any postprocessing ideas that require CS3 are a non-runner. I made the HDR picture with Photomatix.

VxDuncan

2,850 posts

265 months

Tuesday 16th October 2007
quotequote all
I only use CS2 which has correction facility in the RAW converter (only useful if you did shoot raw ), or it in PS's filters->distort->lens corrections menu (IIRC).

Simple way to counter for is to use the point and shoot bodge way of getting better images and desaturate the fringes. Basically zoom in on the area with the fringes (the white house), and use the desaturate tool (sponge), set to sensible pressure and radius to take the colour out of the fringing - it'll be far less noticable in grey.

Better to use the proper correction though!

Another time you may be able to reduce abberations by using a smaller (within reason) apperture.

CommanderJameson

Original Poster:

22,096 posts

257 months

Tuesday 16th October 2007
quotequote all
VxDuncan said:
I only use CS2 which has correction facility in the RAW converter (only useful if you did shoot raw ), or it in PS's filters->distort->lens corrections menu (IIRC).

Simple way to counter for is to use the point and shoot bodge way of getting better images and desaturate the fringes. Basically zoom in on the area with the fringes (the white house), and use the desaturate tool (sponge), set to sensible pressure and radius to take the colour out of the fringing - it'll be far less noticeable in grey.

Better to use the proper correction though!

Another time you may be able to reduce aberrations by using a smaller (within reason) aperture.
Good suggestions, those. Elements 4 has a sponge thing, so I'll try that.

I can put the camera into aperture priority mode and shrink the aperture a bit and see how that affects things.

tank slapper

7,949 posts

314 months

Tuesday 16th October 2007
quotequote all
I have found that it is more prone to this at the extreme ends of the zoom. I notice this is at 6mm, which is the widest the lens goes. I think it is a result of having such a wide zoom range.