ASalina opened this issue on Feb 27, 2002 ยท 10 posts
ASalina posted Wed, 27 February 2002 at 1:34 AM
ASalina posted Wed, 27 February 2002 at 1:36 AM
Antoonio posted Wed, 27 February 2002 at 1:56 AM
Personally, I have found perspective disortion fascinating. I use skew tool from photoshop to do jobs like that. I really like that pic btw. Both of them. .n
PunkClown posted Wed, 27 February 2002 at 4:14 AM
That's a good job you've done there ASalina, and I see what you mean about not being able to ignore the distortion once you've seen the corrected image! Very nice photo(s)! This brings to mind a question for me though - how does the brain perceive perspective? It's not an optical illusion is it? The eye sees parallel lines converging as distance increases...so the distortion is the true representation, is it not? Interesting to think about...(or then again, maybe not! LOL) :-)>
JordyArt posted Wed, 27 February 2002 at 4:28 AM
The Gimp?!? lol - Dunno about elsewhere in the world but that word has a bit of an overt meaning over here!!! Personally I don't like the corrected image - like Punk says, we see convergence as a natural thing - to me the house now looks as though it's been built wrong, wide at the top.....I guess it works better on things a bit of a distance away, though. I understand Andromeda do a perspective plug in for PhotoShop which is apparently quite good. (",)
bevchiron posted Wed, 27 February 2002 at 11:37 AM
Interesting experiment & you've done a good job there, the house looks right in the second one but I feel as though I'm no longer sure of my view point, as PC pointed out I think the brain expects to see distortion.
"You need chaos in your soul to give birth to a dancing star...." (Nietzsche)
Finder posted Wed, 27 February 2002 at 1:26 PM
Wow. We had all better take notice on this one. Thanks. Nice picture you made there, too. Joe
nplus posted Wed, 27 February 2002 at 2:36 PM
In case anyone cares, and would like to find out more on this topic, This distortion is called "Keystoning" In the world of Architectural photography it is a HUGE No,No. I have never used photogimps tools to correct this. (have always been lucky enough to have access to a view camera) ASalina......looks like you did a great job with your available tools. It's good to know that they are Quite useable. (can't always pack a view camera around)
ASalina posted Thu, 28 February 2002 at 11:49 AM
Attached Link: http://www.photo.net/photo/dead-trees/view-camera-technique.html
I think the matter of whether perspective "distortion" is a Good Thing or a Bad Thing is largely subjective. My guess is that the person who coined the term "perspective distortion" considered it a Bad Thing. I think a better way to look at it is as "perspective control", in that in some cases, especially with extremely wide angle shots, the bending of what were straight lines can be so extreme that it draws the viewer's attention from the intended subject. And on the other hand perspective "distortion" can be used to the photographer's artistic advantage. Having control over the effect can only be a Good Thing. :-)One of the things that a View Camera can do that I haven't
been able to duplicate in postprocessing (aside from the
ultra-high resolution inherent in large format film) is to
tilt the lens and film planes. I wonder if it's even
possible for software to correct poor focus at all. I
suppose not.
P.S. For a really striking example of the sharpness of large
format photography, go to the link above and click on the
thumbnail of the photo of the joshua tree. Absolutely stunning.
nplus posted Thu, 28 February 2002 at 2:17 PM
If it's not sharp on the negative, I don't care how many filters and tools you use, You will NEVER be able to correct for an unsharp exposure. especially compared to a view camera ; )