Topic Author
Posts: 251
Joined: Mon May 16, 2005 3:36 pm

Question About How To Avoid Jaggies

Tue Aug 29, 2006 8:24 pm

Hi all,

I read a number of threads here about the subject and applied some sharpening methods (like the ones prescribed by JeffM - Thanks Jeff).

But what if, without even sharpening at all, just reducing the size of an original large image gives jaggies, especially when the painting is composed of color strips on white background painting. The same happens for black registrations on white bodies.

For info, I shoot in Raw and do post-processing.
- Any recommandation on shooting techniques?
- Any special techniques in reducing the image size?
- Any software doing better than P.S. raw converter?
- Any P.S. tool to be used to remove the jaggies?(in less than 15 minutes...) Smile

Thanks for your suggestions.
Patrick De Coninck
Posts: 2717
Joined: Tue Mar 29, 2005 8:05 am

RE: Question About How To Avoid Jaggies

Tue Aug 29, 2006 8:59 pm


I'd like to know a way around this as well, I know exactly what you mean. I find the US Airways livery produces this problem as well. It seems to effect lines which are high contrast and at around 45 degrees. I've tried resizing images in 10% increments in the past, this sometimes works but not always. It solves the problem of jaggies, but I find it produces quite soft results lacking in quality. These are two examples edited in this way:

View Large View Medium
Click here for bigger photo!

Photo © Darren Wilson

View Large View Medium
Click here for bigger photo!

Photo © Darren Wilson

If there's a solutions to this problem, I'd love to know the secret!


Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX
Posts: 249
Joined: Fri Mar 11, 2005 11:38 am

RE: Question About How To Avoid Jaggies

Tue Aug 29, 2006 9:24 pm

I reduce in steps and apply a little sharpening along the way with the sharpen tool (set at about 10%)... if there's any slight jaggies on the final image you can get rid of them with the blur tool (set at about 5% and 4 pixels wide).

-- Mike
Pearl Snares, Taye Drums, Sabian Cymbals, Remo Heads, Los Cabos Sticks
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Joined: Wed Mar 03, 2004 5:09 am

RE: Question About How To Avoid Jaggies

Tue Aug 29, 2006 9:42 pm

I often see a similar problem in the gap between flaps and control surfaces, it can get quite irritating. Most pronounced is the 'piano wire' effect, an aliasing effect that creates the illusion of several, parallel connecting wires between trailing edge of a wing and leading edge of the flap, by no means common but pops up once in a while.

It takes a big man to admit they are wrong, and I am not a big man.

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