Stan Fowler
New member
I have been wanting to do architectural photography with an affordable digital camera. Does anyone know of software or photoshop plug-ins that would accurately correct perspective?
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Perspective Correction Software
- Thread starter Stan Fowler
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BobTrips
Guest
Photoshop Elements does perspective control. I'm sure that the full featured version of PS would.
Or are you asking for something more?
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bob
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Evan Clarke
Active member
Photoshop7 does perspective cropping which is effective and easy..Evan
Joseph S Wisniewski
Forum Pro
Panorama Tools comes with a nice PhotoShop plugin that can do the perspective corrections you want, and it's image interpolation is much higher quality that PhotoShop's built in perspective tool. Panorama Tools also correct barrel or pincushion distortion, so your architectural shots will be perfectly straight.
And, it can correct chromatic abberation, greatly reducing color fringes in your pictures.
It's free, and open source.
And, of course, it will let you stitch multiple shots together into larger ones, if you need wider angles or higher resolution.
http://www.all-in-one.ee/~dersch/
Ciao!
Joe
Rolf wrote:
Stand alone program Photo Brush is not free but only $40.00, free 30 day trial. Easy to use and fast.
http://www.mediachance.com/
Joseph S Wisniewski
Forum Pro
Photo Brush has the same problem as PhotoShop's perspective control, it produces soft, blurred results. They both use bicubic interpolation, while Panorama Tools offers interpolations including 16, 36, and 64 point splines, 256 or 1024 point sinc functions.
Here's an idea of the difference in detail you can expect.
PhotoShop or Photo Brush
Panorama Tools
Ciao!
Joe
Rolf wrote:Photo Brush has the same problem as PhotoShop's perspective
control, it produces soft, blurred results. They both use bicubic
interpolation, while Panorama Tools offers interpolations including
16, 36, and 64 point splines, 256 or 1024 point sinc functions.
Here's an idea of the difference in detail you can expect.
PhotoShop or Photo Brush
Panorama Tools
Ciao!
Joe
Joe, tanks for the heads up on this, had not noticed it at the sizes I am using, mostly CRT and 8x10 print. But I am serenely going to take a closer look....... Rolf
wrphoto
Forum Enthusiast
I am an Architectural photographer and have used ps perspective correction for several years with no blurred problems. I just looked at a scanned 4 X 5 negative at 200% mag and then applied transform correction and viewed the corrected image at 200% and there was no difference in quality. I have delivered 20 X 24 prints to clients that have been corrected in ps and they have been as sharp as uncorrected prints.Photo Brush has the same problem as PhotoShop's perspective
control, it produces soft, blurred results. They both use bicubic
interpolation, while Panorama Tools offers interpolations including
16, 36, and 64 point splines, 256 or 1024 point sinc functions.
Here's an idea of the difference in detail you can expect.
PhotoShop or Photo Brush
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Walt Roycraft
Walt Roycraft Photography
http://www.portfolios.com/wrphoto
Stan Fowler
New member
This sounds great Joe! I will read about it and give it a try.
Thanks!
Stan
Thanks!
Stan
Stan Fowler
New member
Walt, I was wondering if you started from images that were made with a pc lens? If not is it too much to ask of Photoshop to correct normal wide angle images?
Stan
Martin aus Schweden
Member
wrphoto
Forum Enthusiast
Stan,
For 99% of the time i shoot with 4 X 5 and make the corrections in camera, or if shooting 35mm i will either use my 28mm pc or 35mm pc lens.
That said, there are the times that i shoot with my mamiya rz67 with a reular wide angle lens and then make the correction in ps. IMHO it is not to much to ask. I always think it better to make the corrections in camera but there are times...
--
Walt Roycraft
Walt Roycraft Photography
http://www.portfolios.com/wrphoto
Joseph S Wisniewski
Forum Pro
When you're only doing 5x magnification (4x5 negative to 20x24 print) at the kind of resolutions 4x5 negatives are typically scanned at, you can get away with an awful lot of processing before the damage becomes objectionable. I bet you scan your 4x5 negatives at between 1200 DPI and 2400 DPI, for a final image between 30 and 120 megapixels. At 1200 DPI and 5x magnification, you could suffer an 18% image degradation and you wouldn't be able to see it on the print, even under a magnifier. If you're scanning 2400 DPI, you could have 50% distortion and not notice it.
And, since you are using a 4x5 camera, I'd assume (although assuming isn't usually the best thing to do) that you have done most of your correction on the view camera, and are just "touching up" in PhotoShop, only shifting things a few percent. Bicubic interpolators can do small shifts without much distortion.
Aquanet used the term "affordable digital camera". This could mean many different thigns to many people, but I assumed (there's that word again) that he'd be in the 6 megapixel range that I find affordable with my SLR. This means two things.
First, there aren't many pixels to start with, so every pixel needs to be treated like gold.
Second, that he probably isn't using a shift lens, and thefore needs massive corrections, something on the order of 30%. And that means you need a better interpolation algorithm. Either one of the small "step" or "staircase" interpolator actions for PhotoShop, or a plugin like Panorama Tools.
Personally, I'd go for the Panorama Tools plugin. While "step" actions act a bit like a higher order interpolator, they still distort more than a true high order interpolator.
This might matter to you, even with the 4x5, some day. I've enlarged some of mine up to 4x5 feet, and you really need a big, clean image file to pull that off.
Ciao!
Joe
Joseph S Wisniewski
Forum Pro
Hi Martin.
Unfortunatly, I have no idea. There is an OS-X version, but I don't know how well X.2 is supported.
But I know who would know. Kevin at Kekus Digital is probably the world's best authority on Panorama Tools on the Mac.
http://www.kekus.com/index.html
Sorry I couldn't be more help.
Ciao!
Joe
Theo Papageorgiou
Well-known member
Hi,
You can use PixTool to find the software for your needs.
http://www.pixtool.com/Default.asp?CategoryID=50
Cheers,
Theo
You can use PixTool to find the software for your needs.
http://www.pixtool.com/Default.asp?CategoryID=50
Cheers,
Theo
F. Vissel
Well-known member
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