Ad
Ad
Ad
Pages: [1]   Bottom of Page
Print
Author Topic: Barrel Distortion Correction on DPP  (Read 3363 times)
francois
Sr. Member
****
Offline Offline

Posts: 7002


« on: September 02, 2005, 12:25:04 PM »
ReplyReply

Hi,
Have you compared Photoshop CS 2 lens correction to PTlens correction?
I'm just curious  Cheesy

Francois
Logged

Francois
lester_wareham
Full Member
***
Offline Offline

Posts: 116


WWW
« Reply #1 on: September 02, 2005, 04:24:17 PM »
ReplyReply

Quote
Hi,
Have you compared Photoshop CS 2 lens correction to PTlens correction?
I'm just curious

Francois
No I don't have PTLens, I would think they would be more or less the same, if you do this you must interpolate the pixels.

I put the results up on Lens Distortion Correction and Image Detail if your interested.
Logged
lester_wareham
Full Member
***
Offline Offline

Posts: 116


WWW
« Reply #2 on: September 03, 2005, 05:20:32 AM »
ReplyReply

Quote
The results are interesting, thanks for posting them. Now, in real world I don't know if the degradation would be apparent. Sharpening and other operations could lessen the perceived effect of lens corrections.
Yes I think you are right. I have updated the page with the effect of sharpening and a real world example that was sharpened before correction but not after.

The real world example shows almost no loss but then it was only a hand held shot.

I guess this makes me a little less worried about this problem.

PS I have also uploaded one of the test patterns so you can try this on PTLens if you want.
Logged
lester_wareham
Full Member
***
Offline Offline

Posts: 116


WWW
« Reply #3 on: September 02, 2005, 09:03:26 AM »
ReplyReply

I just did some quick tests on this and I was quite amazed to see how the PS CS2 lens correcton filter destroys fine detail all over the image not just at the corners or edge, even with quite small amounts of correction.

My tests were with artificial test paterns, but do others notice problems like this with real life targets?

PS I just noticed the title says DPP - it should say PS CS2!
Logged
francois
Sr. Member
****
Offline Offline

Posts: 7002


« Reply #4 on: September 02, 2005, 12:26:43 PM »
ReplyReply

Hi,
Have you compared Photoshop CS 2 lens correction to PTlens correction?
I'm just curious

Francois
Logged

Francois
francois
Sr. Member
****
Offline Offline

Posts: 7002


« Reply #5 on: September 03, 2005, 01:46:27 AM »
ReplyReply

Quote
No I don't have PTLens, I would think they would be more or less the same, if you do this you must interpolate the pixels.

I would think so too as there's no magic involved in lens correction math!
The results are interesting, thanks for posting them. Now, in real world I don't know if the degradation would be apparent. Sharpening and other operations could lessen the perceived effect of lens corrections.

Francois
Logged

Francois
Pages: [1]   Top of Page
Print
Jump to:  

Ad
Ad
Ad