K3 fireworks jaggieness?

dasPaul · 01-03-2016, 07:46 AM

Hi there,

I was just going through my New Year's Eve fireworks images (my first fireworks shoots at all) as I noticed some heavy jaggieness in it. I shoot with an K3 and without AA-Filter. They can be seen easy in the long fireworks trails.
Is this normal for an K3 without AA-Filter enabled? I know fireworks is a special lightning situation. I can see the same jaggieness in my raw viewer (ufraw) so I guess this is not dye raw conversion.

Full size view:
https://pauledd.files.wordpress.com/2016/01/imgp26391.jpg

I croped an 100% example:

If you want you can also take a look at the raw file:
File-Upload.net - IMGP2639.DNG

Last edited by dasPaul; 01-03-2016 at 07:55 AM.

Ole · 01-03-2016, 09:26 AM

I downloaded your raw file and processed it. Pixel peeping at 100% confirms the jaggedness and I think it is as one would expect at 100% from a Bayer sensor.

**Digitalis** · 01-03-2016, 09:42 AM

Originally posted by Ole

I think it is as one would expect at 100% from a Bayer sensor.

I concur, due to the inherent nature of Bayer sensors jaggies are expected to appear when no AA filter is present, sometimes they appear even if there is an AA filter in the optical path.

dasPaul · 01-03-2016, 09:51 AM

Ok, so no reason to worry about

thank you!

Ikarus · 01-03-2016, 01:43 PM

Just like moire, this is an aliasing artefact, and enabling the AA simulator should take care of it. Over-sharpening in post can make it worse. This is not a problem limited to Bayer sensors, by the way.

01-03-2016, 07:46 AM	#1
dasPaul Forum Member Join Date: Feb 2013 Location: Dresden,Saxony Photos: Albums Posts: 51	K3 fireworks jaggieness? Hi there, I was just going through my New Year's Eve fireworks images (my first fireworks shoots at all) as I noticed some heavy jaggieness in it. I shoot with an K3 and without AA-Filter. They can be seen easy in the long fireworks trails. Is this normal for an K3 without AA-Filter enabled? I know fireworks is a special lightning situation. I can see the same jaggieness in my raw viewer (ufraw) so I guess this is not dye raw conversion. Full size view: https://pauledd.files.wordpress.com/2016/01/imgp26391.jpg I croped an 100% example: If you want you can also take a look at the raw file: File-Upload.net - IMGP2639.DNG Last edited by dasPaul; 01-03-2016 at 07:55 AM.

01-03-2016, 09:42 AM	#3
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by Ole I think it is as one would expect at 100% from a Bayer sensor. I concur, due to the inherent nature of Bayer sensors jaggies are expected to appear when no AA filter is present, sometimes they appear even if there is an AA filter in the optical path. Last edited by Digitalis; 01-03-2016 at 09:53 AM.

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01-03-2016, 09:26 AM	#2
Ole Administrator Join Date: Sep 2006 Location: Copenhagen, Denmark Photos: Gallery \| Albums Posts: 4,408	I downloaded your raw file and processed it. Pixel peeping at 100% confirms the jaggedness and I think it is as one would expect at 100% from a Bayer sensor.

01-03-2016, 09:51 AM	#4
dasPaul Forum Member Join Date: Feb 2013 Location: Dresden,Saxony Photos: Albums Posts: 51 Original Poster	Ok, so no reason to worry about thank you!

01-03-2016, 01:43 PM	#5
Ikarus Veteran Member Join Date: Apr 2010 Location: California Photos: Albums Posts: 484	Just like moire, this is an aliasing artefact, and enabling the AA simulator should take care of it. Over-sharpening in post can make it worse. This is not a problem limited to Bayer sensors, by the way.