Forum:
Tips & Tricks
Thread:
Barrel/Perspective Distortion Tool
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Forum:
Tips & Tricks
Thread:
Barrel/Perspective Distortion Tool
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Re: Barrel/Perspective Distortion Tool
Posted: 5 May 2010 at 13:37 GMT
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I don't use Photoshop myself - prefer GIMP - but Correctrix is designed for mathematical precision, rather than intuitive GUI.
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Forum:
Tips & Tricks
Thread:
Barrel/Perspective Distortion Tool
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Barrel/Perspective Distortion Tool
Posted: 5 May 2010 at 10:56 GMT
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I have developed a tool in PHP with the Imagick extension for reducing barrel/pincushion distortion and perspective distortion, somewhat similar in function to PTLens, but more flexible and easier to operate.
A tutorial with source code is available at correctrix.skeptic.de. Use is subject to GNU GPL.
Example images:
(before)
(after)
Let me know if there are any bugs.
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Forum:
Tips & Tricks
Thread:
Basics on shooting photos for a panorama??
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Re: Basics on shooting photos for a panorama??
Posted: 4 Mar 2010 at 21:22 GMT
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I don't get your intention. what are you trying to get across?
Cheers
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Forum:
Tips & Tricks
Thread:
Panorama to video frames, II
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Re: Panorama to video frames, II
Posted: 22 Feb 2010 at 22:59 GMT
updated: 22 Feb 2010 at 23:04 GMT
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Dear Michael,
The thread "Extract frames from Panorama" can be found in these forums. It was current until about 6 months ago. (Thread #72 from now, last reply: 10 Jul 2009 at 18:04).
What I do is:
Take a cylindrical panorama;
Extract an image from the lefthand side;
Then move through the panorama extracting successive images, each spaced by pixel/image increments;
This series of images (like film frames) is then assembled to AVI or MPEG format
So the process is not turning video into panoramas, but the other way around.
Please ask if you have any other questions.
Love Basel, have some cool friends there (at least, in Muttenz).
Latest video on youtube (see channel above) - Teide y Montana Blanca - has barreled and 3d (fisheye) distortions.
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Forum:
Tips & Tricks
Thread:
Panorama to video frames, II
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Panorama to video frames, II
Posted: 16 Feb 2010 at 18:47 GMT
updated: 16 Feb 2010 at 18:51 GMT
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About 8 months ago, I put up a PHP script that will split up a panorama into individual frames for reassembly to video (see thread "Extract frames from panorama" on this site).
I now have a further script that makes use of ImageMagick, available at psimagick.skeptic.de. This script will also do "barrel" and "3D" effects, as well as different sharpening levels, and different pixel increments/frame.
You can see what the resultant videos look like at my youtube channel (www.youtube.com/lctraynor), where the latest two (Paihia Sunset and Point Elizabeth Walkway) have barrel effects (the clouds are moving!).
Hope this is useful to someone.
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Forum:
Tips & Tricks
Thread:
Extract frames from panorama
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Re: Extract frames from panorama
Posted: 10 Jul 2009 at 16:04 GMT
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First of all, Steve's link should be wiredeye.net/lib/qtvrmovie/ without the semicolon.
What Hans is referring to is not really perspective, but the effect of panning a camera at short effective focal lengths. This distorts the image by apparently stretching the left and right edges of a landscape photo.
My original concern (and that of a number of people on various forums) was indeed the production of "flat" sequences of images and the youtube videos Tekapo, Mt Cook and Mackinnon Pass all contain exclusively flat pans. But having solved my "exercise" 7.6 - although not entirely to my satisfaction, starting with Views from Mackinnon Pass, there are pans that are suitably distorted, e.g. in Views the scenes at 0:50 and 6:10 and all pans in the subsequent videos, Point Elizabeth, Cape Kidnappers and Kaikoura Peninsula have various degrees of distortion (around 5%).
So if anyone has a more time-efficient solution to 7.6 Projections (I'm referring to my PHP tutorial at www.skeptic.de/PHP_Tutorials/panslicer.htm), then please let me know and I will take it up.
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Forum:
Tips & Tricks
Thread:
Extract frames from panorama
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Re: Extract frames from panorama
Posted: 1 Jul 2009 at 10:53 GMT
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Sorry, Steven, your link (wiredeye.net/...) appears to be broken (Error 404).
In the meantime I have produced a number of animated panoramas using my code and have posted them to youtube (www.youtube.com/lctraynor).
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Forum:
Tips & Tricks
Thread:
Extract frames from panorama
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Extract frames from panorama
Posted: 2 Jun 2009 at 12:05 GMT
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A request that I've seen is to break down a panorama image into a series of frames for use in other media (e.g. videos).
This is how PHP can do it: panslash.skeptic.de
The individual images can be collated into AVI by makeAVI from sourceforge.net.
Hope this finds some use.
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