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Resizing Causing Jaggies - Help  
User currently offlineMrk25 From United Kingdom, joined May 2005, 225 posts, RR: 1
Posted (8 years 11 months 3 weeks 6 hours ago) and read 1759 times:

Hi everyone, I am in the process of editing some shots from the weekend and one is giving me huge problems. I have converted the RAW image to Jpeg with no sharpening at all, when viewed at full size it is fine. As soon as I resize it to 1024 all the cheatlines produce jaggies, this is before any other sharpening is applied. I have tried it in Jpeg & Tiff but it is the same.
Any ideas ? Please.

13 replies: All unread, jump to last
 
User currently offlineLHRsunriser From United Kingdom, joined Oct 2004, 399 posts, RR: 2
Reply 1, posted (8 years 11 months 3 weeks 6 hours ago) and read 1738 times:

Mostly to do with Heat Haze I imagine if you were shooting in the U.k I was shooting on Sunday at LHR heat haze was a problem.

I do my best to get rid of them though  stirthepot  But it never works cos you can't get rid of them I dont think

Cheers Dom - Capital Aviation Photography



Getting back into it
User currently offlineScooter From United States of America, joined Jun 1999, 852 posts, RR: 1
Reply 2, posted (8 years 11 months 3 weeks 6 hours ago) and read 1717 times:

This is my biggest post-processing annoyance of all time (no...it's not heat haze as suggested above).

The trick? Reduce (from your RAW file) exactly 50%. Voila! No more jaggies.


User currently offlineMrk25 From United Kingdom, joined May 2005, 225 posts, RR: 1
Reply 3, posted (8 years 11 months 3 weeks 6 hours ago) and read 1711 times:

Hi Dom, Yes I was at LHR on Saturday shooting take off's, It is a real shame as the original image is not too bad, although it needs an extra kick of USM.
Thanks for your reply.
Mark


User currently offlineLHRsunriser From United Kingdom, joined Oct 2004, 399 posts, RR: 2
Reply 4, posted (8 years 11 months 3 weeks 6 hours ago) and read 1708 times:

Quoting Scooter (Reply 2):
(no...it's not heat haze as suggested above).

Ok so on a hot day, zoomed in quite alot I imagine getting departures. Heat haze isn't going ot be a problem?

I think it is  fluffy 

Cheers Dom - Capital Aviation Photography



Getting back into it
User currently offlineMrk25 From United Kingdom, joined May 2005, 225 posts, RR: 1
Reply 5, posted (8 years 11 months 3 weeks 6 hours ago) and read 1699 times:

Thanks Scooter, Works a treat. Back to some serious editing.
Mark


User currently offlineScooter From United States of America, joined Jun 1999, 852 posts, RR: 1
Reply 6, posted (8 years 11 months 3 weeks 5 hours ago) and read 1695 times:

Quoting LHRsunriser (Reply 4):
Ok so on a hot day, zoomed in quite alot I imagine getting departures. Heat haze isn't going ot be a problem?

Yes, heat haze will be a problem. But your original question made it sound like you were experiencing a very common post-processing issue. Jaggies resulting from extreme image down-sampling is pretty common, and occurs mostly in areas of the image where there are fine/thin horizontal lines.

Heat haze is a completely different issue.


User currently offlineScooter From United States of America, joined Jun 1999, 852 posts, RR: 1
Reply 7, posted (8 years 11 months 3 weeks 5 hours ago) and read 1686 times:

Quoting Scooter (Reply 6):
Yes, heat haze will be a problem. But your original question...

oops...sorry. Had you mistaken for Mrk25.


User currently offlineMrk25 From United Kingdom, joined May 2005, 225 posts, RR: 1
Reply 8, posted (8 years 11 months 3 weeks 5 hours ago) and read 1676 times:

To any of you guy's still in this thread, I read earlier about turning the sharpness setting on the camera itself right down to as good as off, have any of you had any experience with this.

User currently offlineLHRsunriser From United Kingdom, joined Oct 2004, 399 posts, RR: 2
Reply 9, posted (8 years 11 months 3 weeks 5 hours ago) and read 1659 times:

Quoting Scooter (Reply 6):
Heat haze is a completely different issue.

Sorry for being abrupt Scooter. But heat haze can't be written out of the equation.

Cheers Dom - Capital Aviation Photography



Getting back into it
User currently offlineScooter From United States of America, joined Jun 1999, 852 posts, RR: 1
Reply 10, posted (8 years 11 months 3 weeks 4 hours ago) and read 1641 times:

Quoting LHRsunriser (Reply 9):
Sorry for being abrupt Scooter. But heat haze can't be written out of the equation.

No worries...and yes, I agree - heat haze can be a problem. But the OP stated that his problem was that jaggies were occuring when he was resizing his images. If it were heat haze, the the visibilty of the "jaggies" (or slight blur/distortion) would decrease upon down-sampling an image. Trust me, I've been shooting for years, and I do know the difference between heat haze and jaggies/imperfections caused by various post-processing techniques. Heat haze suuuucccks though. I don't even like talking about it.  Smile

Quoting Mrk25 (Reply 8):
To any of you guy's still in this thread, I read earlier about turning the sharpness setting on the camera itself right down to as good as off, have any of you had any experience with this.

Yep, it's best to turn the sharpening OFF on your camera (if possible).


User currently offlineMongorat From United States of America, joined Jun 2005, 165 posts, RR: 13
Reply 11, posted (8 years 11 months 3 weeks 4 hours ago) and read 1624 times:

Hi All,

I know the original thread starter was a question about RAW files and jaggies but my question is what happens when one downsizes a JPEG file?? Same result in that one should expect some jaggies?? I've been experiencing jaggies more and more lately, especially on the leading edges of the wing, is this the exact point Scooter makes when he says jaggies appear on fine/thin horizontal lines??

Cheers,
Matt


User currently offlineMrk25 From United Kingdom, joined May 2005, 225 posts, RR: 1
Reply 12, posted (8 years 11 months 3 weeks 3 hours ago) and read 1620 times:

Hi Matt, I haven't had too many probs with leading edges only horizontal lines, more so when an aircraft has multiple horizontal lines. But I am sure leading edges could be affected in the same way.
Mark


User currently offlineMongorat From United States of America, joined Jun 2005, 165 posts, RR: 13
Reply 13, posted (8 years 11 months 3 weeks 1 hour ago) and read 1584 times:

Thanks Mark...strange...I've never had problems with horizontal lines, just leading edges; I suppose one day we'll both find a fix for our problems!!

Cheers,
Matt


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