raptors
Posts: 162
Joined: Tue Mar 15, 2005 3:30 am

Jagged Edges - What Causes Them And How To Reduce?

Mon Aug 14, 2006 3:05 am

A question which has been bugging me for a while now, is what causes those jagged edges? They seem to get worse, the smaller the photo is made, and they can still appear even if the correct 3/2 ratio is used. Why is this, and more importantly, how can you reduce the effects, or stop them happening in the first place? Does going 'filterless' solve this problem, or at least help it?
Any thoughts on this matter will be read with interest!!!! Thanks.
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ptrjong
Posts: 4119
Joined: Wed Mar 02, 2005 9:38 am

RE: Jagged Edges - What Causes Them And How To Reduce?

Mon Aug 14, 2006 3:15 am

Jaggies are mostly caused by a digital technique called 'sharpening', which makes your photos less 'soft'. Sharpening is best applied selectively in post-processing to prevent these jaggies. If your photos are jagged straight out of the camera, you should probably turn automatic in-camera sharpening off.

Peter Smile
The only difference between me and a madman is that I am not mad (Salvador Dali)
 
raptors
Posts: 162
Joined: Tue Mar 15, 2005 3:30 am

RE: Jagged Edges - What Causes Them And How To Reduce?

Mon Aug 14, 2006 3:54 am

Thanks Peter, I'll give it a try!!  Smile
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gerardo
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RE: Jagged Edges - What Causes Them And How To Reduce?

Mon Aug 14, 2006 4:09 am

Jaggies can also appear while resizing a photo. Photoshop for example has different options to resize a photo.

Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
raptors
Posts: 162
Joined: Tue Mar 15, 2005 3:30 am

RE: Jagged Edges - What Causes Them And How To Reduce?

Mon Aug 21, 2006 11:44 pm

Thanks Gerado
I'm not sure if you are an expert or not, but can you provide me with a little more info. At smaller szies I seem to have more jaggies than larger sizes. Can I do anything bout this when edtting, or can some setting be changed?
Thanks.
SSC/111/146/AR8/AT7/AN3/AB4/6/310/319/20/21/332/3/343/6/703/722/732-9/74L/2/4/F/752/3/772/3/W/E170/190/CR7/9
 
raptors
Posts: 162
Joined: Tue Mar 15, 2005 3:30 am

RE: Jagged Edges - What Causes Them And How To Reduce?

Mon Aug 21, 2006 11:46 pm

Thanks Gerado
I'm not sure if you are an expert or not, but can you provide me with a little more info. At smaller szies I seem to have more jaggies than larger sizes. Can I do anything bout this when edtting, or can some setting be changed?
Thanks.
SSC/111/146/AR8/AT7/AN3/AB4/6/310/319/20/21/332/3/343/6/703/722/732-9/74L/2/4/F/752/3/772/3/W/E170/190/CR7/9
 
linco22
Posts: 1279
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RE: Jagged Edges - What Causes Them And How To Reduce?

Tue Aug 22, 2006 12:15 am

At smaller sizes you are essentially moving all those individual pixels into a smaller space. Obviously its all relative but on doing that you tend to create jaggies. But what you must remember is that your monitor plays a large part on this too. My Dell Ultrasharp 19" seems to generate more jaggies than my old CRT.

Regards
Colin  Smile
 
raptors
Posts: 162
Joined: Tue Mar 15, 2005 3:30 am

RE: Jagged Edges - What Causes Them And How To Reduce?

Tue Aug 22, 2006 3:32 am

Thanks Colin, it makes sense what you say. I too have a Dell 17 or 19 Flat screen monitor, so maybe that has something to do with it. I shall trall through my rejections at work and compare them to the photos on my home PC.
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