Correcting Lens Distortion = 1:1 photos

I need to take top down photos of objects and then convert the pictures to a CAD file. So far I am having trouble with lens distortion. Anyone know of a quick way to correct the distortion so that the image is 1:1?
I am using a 30mm Macro lens - the camera has a built in lens correction facility but so far only one axis is correct.

No, I'm on Windoze.
My work around was to cut in a section of black video on track 1 and dissolve to black, letting the still image on track 2 float over that. But that combo, ie. lens distortion and opacity, appears very buggy. Now this is one of the few 1920x1080 clips in a mostly 1280x1080 timeline (P2 is not square pixels), so that may be contributing..

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Does Aperture Correct Lens Distortion with Panasonic Raw Files?

I have a Panasonic GF1. When shooting in JPEG I know that the camera adjust for barrel distortion on the saved image. However It does not for RAW images as far as I know.
I am aware that Adobe reluctantly added the software correction to Adobe Camera Raw for Panasonic cameras that need this for their RAW files to look correct, even though technically the file is no longer RAW after this adjustment. The information needed to do these corrections is encoded in the RAW file. So! I am wondering if Aperture does this correction to imported RAW files now that it supports The GF1?
Heres a more in depth look at the distortion issue: http://www.dpreview.com/reviews/PanasonicGF1/page19.asp

As a DMC-G1 owner, I thought that RAW conversions were fully supported now. Turns out that my perception seems to have been only partly true.
I fired up SilkyPix again (thought I'd seen that for the last time!) and checked what corrections it offers. In the 'Lens aberration controller', there are three controls: Shading (angle and amount), Distortion (distortion rate and centre) and Chromatic Aberration (R rate and B rate).
Aperture only exposes controls for the [Chromatic Aberration|http://documentation.apple.com/en/aperture/usermanual/index.html#cha pter=17%26section=11|Working with the Chromatic Aberration Controls] (red/cyan and blue/yellow) - this can be applied globally or brushed in selectively.
There doesn't appear to be any access to shading or distortion as there is in SiklyPix, though - at a quick glance and I could be wrong - Aperture's [Devignette|http://documentation.apple.com/en/aperture/usermanual/index.html#ch apter=17%26section=4|Working with the Devignette Controls] tool appears to provide a similar function to the description of the Shading tool in SiklyPix.
If there's distortion correction automatically going on behind the scenes - you did mention the embedded correction information in the RAW file - then it's not obvious. There's certainly no user control that I have seen.
Hope this helps...
Regards,
Gary

Can I correct for distortion caused by wide angle lenses using Apature - for instance in mountain photos?

I am using Apature 3.5.1 and want to correct for the (parallax?) effect, "tilting", created by wide angle lenes in mountain photos. Can I do this in Apature and is so how

Aperture cannot correct lens distortion you will need to resort to a plugin.
PTLens is used by a number of users here (myself included) with good results.

Lens Distortion Correction Documentation?

I have seen in some discussions that LR corrects lens distortion for some lenses and some cameras. I have not been able to find documentation that indicates what cameras and lenses are supported for this - either for LR2.3 or 3.0beta. Is that documentation available somewhere?
Thanks!
David

Well, I guess that would be why I couldn't find it. ;-)
I'll try a more specific question. Are any DSLRs supported by the distortion correction? Specifically, I'm interested in a Canon EOS 5D, and what lenses (if any) Adobe has profiled for distortion with this camera.
I am hopeful that when LR3 comes out of beta, it will have distortion correction for most or all supported cameras and lenses, and that at least some of the specifics will be documented.
Thanks!
dbr

Lens Distortion correction not working on tonemapped jpg files

I have a series of photos exported from Lightroom 2 that I HDR tonemapped in Photomatix. Unfortunately after a disk failure I do not have the original RAW files and only have the 100% jpg saved tonemapped files from photomatix.
Now that Lightroom 3 is out I wanted to try some lens distortion correction on them. I imported them and immediately noticed after enabling the lens profile corrections and choosing my lens that although chromatic arberration and vignetting works there is no effect at all with the distortion correction! Even when I slide the slider from one side to the other absolutely nothing changes.
I tried it on other raw files and it works fines. I tried it on jpgs that I have that have not been combined and tonemapped in photomatix and they work fine. It is only the jpgs created from photomatix.
Is there something about the exif data that I am not considering or any other explanation as to why the photomatix jpgs won't take any distortion correction? thanks

If it's working for other jpg's, (and I though it didn't work on jpgs, so who knows?) then it does sound like the photomatrix program is wiping out the exif information that is needed.
Did you try using a viewer to look at the exif info, both before and after, to compare? Maybe there is a setting (in photomatrix) that you are missing when you save data?
Sorry, don't know photomatrix, so just offering generic ideas in the hopes it sheds light..
Cheers!

Lens distortion correction in Premiere CS6?

I'm trying to correct the distortion caused by a wide-angle lens in Premiere CS6. From what I can tell, there is no filter or transform / distort feature within Premiere itself. I followed the steps in this tutorial to open the MPEG4 in Photoshop, apply the lens correction filter, and then export the video again to be re-imported to Premiere. http://podcasts.creativecow.net/adobe-premiere-tutorials-podcast/correcting-lens-distortio n
However this tutorial is for CS5. I am seeing no adjustment or filter layer in my layers panel, as it appears in the tutorial. When I go to export the video, it seems the Adaptive Wide Angle filter or the Lens Correction filter has only applied to a single frame of the whole clip. Bummer.
Any other suggestions for fixing lens distortion in Premiere?
Thanks!

Both these replies are a bit rude and unhelpful. I am editing in Premiere, and I am not very familiar with it. The question is about how to fix lens distortion in Premiere. Maybe there's a way to do this that I'm not aware of...? That's why I asked the question! There's nothing about it that I could find in the forums. The only fix I found didn't work—which was to use Photoshop *integrated with Premiere*. And two people tell me to use AEFX without pointing me in any directions of how to do that. Useless.
Anyway, I found some information that *was* helpful. This tutorial demonstrates that one critical step was missing from the prior tutorial, which is to convert the video layer to a smart object before applying the effect:
http://www.protechreviewgroup.com/tutorialsinformation/tutorial-fisheye-correction-in-phot oshop-for-gopro-hero-hd/
The same person provided a tutorial on how to do this in AEFX:
http://www.protechreviewgroup.com/tutorialsinformation/tutorial-fisheye-lens-correction-in -after-effects-for-gopro-hero-hd/
Now that these steps are taken, I have to take the footage back into Premiere. It's a workflow question. Other video editing software has this kind of stuff built-in to the effects panel.

How do I correct extreme lens distortion?

How do I correct fisheye extreme lens distortion with PSCC?
Adobe Creative Cloud

Image >> Transform >> Perspective
Drag the corner handles at the top out - to correct converging vertcals.
But remember the fish eye effect is meant to be distorted.

Digital Camera RAW Update 5.02 breaks Sony RX100 lens distortion correction (AGAIN!)

Just like with the Digital Camera RAW Update 4.08, the latest 5.02 update breaks the Sony RX100 lens distortion correction again. I'm reverted back to 5.01 until this is fixed.
From your Time Machine backup, restore the previous versions of
/System/Library/CoreServices/RawCamera.bundle
/System/Library/CoreServices/RawCameraSupport.bundle

Yes, I noticed it too, but I wasn't certain it was 5.02 that did it as I sold my RX100 and haven't processes any files for a while. Then as part of the NR discussion here I looked at some old RX100 files, and the distortion correction now disappears. Unfortunately I can't really revert to 5.01 because I was waiting on the A7 support 5.02 brought.
Apple are aware of it, so hopefully the fix will be quick to arrive.
Andy

Perspective correction and Lens distortion removal tools

Hi,
as a photographer who aspires to create pictures with best possible quality available to me I am very bothered that my primary image editing tool is lacking Perspective correction and Lens distortion removal tools. I believe that there should be no questions if such tools are necessity or so to speak additional enhancements. It is eating the disk space as well having multiple copies clutters the projects if these functions are available only via plug-ins or additional external tools.
How are you guys handling such issues?
For a moment I was thinking to convert all the files through Nikon Capture NX2 before importing to Aperture but that again is counter effective in long run. Aperture is built to work with Raw files and large tif files take longer to process between various programs and I would loose all the benefits of having Raw file at all.

It would be nice to have those functions added to the next version.
I always use the following page to select the product I want to provide feedback on:
http://www.apple.com/feedback/
Note - due to the number of lenses and cameras, this would be a huge task and the end result may not include a lot of older lenses which really need the correction.
I use PT Lens as a plug-in inside of Aperture for the most part (although I do have PS CS5 and DxO Pro 6 for situations where I want something different).
As you said, the downside is that you end up with a TIFF (from inside Aperture) or a processed file needing to be import into Aperture.

Perspective/lens distortion correction

About the only thing I ever have to go out of LR2 to do is correct for perspective or for lens distortions (esp. on wide angle lenses). I know this might not be an easy thing to fit in the interface, but it'd be very useful. Especially if you can set it up to do a stored lens distortion correction for a given lens at a given focal lens (+ maybe focus distance).
-Lars

I hope y'all don't mind if I think aloud a little more here.
We've been talking about perspective correction and lens distortion correction as if they were just about the same. They aren't.
Lens distortion correction is a fairly complex warp, but one that is completely determined by the lens and focal length (please corect me if I'm wrong). The main use of it would be to correct for the lens defects, not to create an artistic effect (like CA repair). It could therefore very reasonably be done as a preparation step, as with the Olympus cameras that actually store some correction information. It would be of relatively low user value to be able to change it later, and it would be much harder to implement.
Perspective correction is most definitely a user-driven correction. Not only does LR not stand a chance of figuring out what to do automatically, there would also be many cases where you'd want to correct in one dimension but not another, correct somewhat less that 100%, or in other ways fiddle with the amount of correction. Fortunately, it is a much simpler correction, merely the application of a small transformative matrix. Unlike lens distortion correction, it doesn't turn circles into strange wobbly shapes, but merely into ovals.
Let's take a look at the local adjustments: Crop, rotate, red-eye, spot removal, graduated filter and adjustment brush.
Crop would be well-nigh impossible to mix in with lens distortion correction, another reason to have the correction applied first. With regards to perspective, it should behave more or less like it does towards rotation.
Rotation can actually be done internally using the same operations that perspective correction would, but should probably still be separate in the interface.
Red-eye and spot removal both operate on horizontal-vertical ovals (restricted ovals for spot removal). These would be awful with user-adjusted lens distortion correction, even more reason to have that be an initial step. Perspective correction would stretch them somewhat. What happens when the user makes a dust spot fix, then fixes the perspective, then attempts to adjust the dust spot fix? We end up with the same situation as with vignetting: That there are pre- and post-crop versions. This distinction would now have to extend to pre- and post- crop+rotate+perspective adjustments. Obviously, you'd also want to be able to spot remove based on the corrected image, and it'd be strange to have a tool that's bent. It may be necessary to separate out dust spot removal from "subject matter removal" (including red-eye), as dust spotting should always be before perspective correction.
Graduated filter was really the thing that convinced me that the two corrections need to be split. Applying lens distortion correction after graduated filter would lead to a bent 'horizon line', a very bad thing indeed. Fortunately, it would be fairly resistant to perspective correction, though not entirely: If the horizon does not follow the perspective correction axis, the outer lines ought to tilt together. Probably overkill, though.
We already have an example of a similar situation: Red-eye removal and rotating. Try making a red-eye correction, then rotating the picture sharply. The red-eye oval will stay in the same position, even though that moves it from where it was supposed to be. I guess graduated filters could behave similarly.
The adjustment brushes are probably the simplest: Since they're already amorphous shapes, they can "simply" be bent and distorted along with the corrections and still make as much sense afterwards. Except if you want to use them to correct lens errors, but I don't know how often you'd want to do that.
Perhaps distortion correction and pre-crop vignetting should belong together. They would certainly interact.
That's my $0.02 plus inflation.
-Lars

Lens Corrections in Bridge. Lens Distortion not in Bridge.

I can open Bridge without opening Photoshop;
also, I can edit CR in Bridge without opening
Photoshop CS4.
Cmd+R puts images into Raw editing.
There is a Lens Corrections feature in
Bridge which has no access to a Lens
Distortion control in Bridge.
Opening up several hundred CR's in Photoshop
halts my productivity immediately.
Lens Distortion should be one of the very first
accessible tools in Bridge CR. If it is available
in Bridge, where is it?
Next question: Is Lens Distortion available in CS5 Bridge?
Befuddled.

Can you clearify a point for me? I always assumed that there was one ACR and
it could be acceessed from Bridge or from Photoshop.
Hi Curt
It is correct that there can only be one version of ACR, however both Bridge
and PS can use them together at the same time. Don't know how but it works
as long as I can remember and I have no reason to assume it does not so in
Windows.
Using the command open in Bridge or double click on thumbs opens the files
in ACR through Photoshop. Open in Camera Raw or cmd + R opens the files in
ACR using Bridge.
Open files using choose with lets you choose all the applications that are
capable of opening the file. (Raw files have limited options of course -due
to the need for a Raw converter- but for instance a jpg file has a lot of
options depending on how many applications you have installed on your
machine)
In the Bridge prefs you can also check the option to open Raw files in ACR
Bridge with double click on a file (by default turned off).
Another option is to use right click mouse menu on selected files and then
you can also choose from the above ways to open files.
There is a but in this, Although you can use them both together they can't
use the same function in both apps to do it in PS at the same time, you have
to wait for one task to be finished.
Hence the small difference in both ACR windows, in PS the 'Open' button
bottom right is active. Using ACR in Bridge the 'Done' button is active.
But if you have a big session and start using ACR in PS and make your
settings in filmstrip mode on multiple files you then can open them in PS.
This can take some time so meanwhile you can switch to Bridge and start work
on a new batch applying settings in ACR Bridge. After you have finished this
session hit done and this applies the new ACR settings to the files in
Bridge, the thumbs will be update.
Meanwhile you can switch to PS and finishing the job inhere. Then again go
to Bridge and open the latest corrected files directly in PS using the shift
key to bypass the ACR window (you already had the settings applied,
remember). If you wish you can then again choose a new job in ACR Bridge
while PS opens the files, and so on and so on.
Depending on your machine specs this can be done without delay (fast machine
with enough RAM). You can also choose to save files which will provide you
with a waiting list that functions in the background. Also now you can use
the other app to work in.
Nice, isn't it??
Only downside is that you won't have an excuse for a coffee break, but as
they say, You can't have them all...

Lens distortion correction

I would like to know if there is way to correct a lens distortion (Barrel Distortion) inside Lightroom. If not, how can I do it.
ex. Nikon D70 lens 18-70mm

And this is really a thread for the main forum. This is Feature Requests, and this one is already in.
Don

Lens distortion corrections in Camera Raw?

Chromatic aberration, lens vignetting, post crop vignetting
are possible in Camera Raw.
Why not have access to lens distortion corrections in CR?

Maybe show us a screenshot of what you see on the system that isn't want you expect. What version of ACR are you using in each? It should be visible in the title bar of the ACR plug-in if you unmaximize it, or you can do About Plug-ins / Camera Raw in PS.
Here is the Manual tab of ACR 6.7 on Windows in CS5:

I've done spot healing in my images but want to change lens distortion corrections. Does it matter?

- I originally corrected all the lens distortion in my images with the default Adobe lens profile for the lens, and also done all the spot healing too. However, I now want to change the lens distortion profile to a profile that i've made instead. The Adobe default lens profile and the one that i have made give different distortion corrections (Adobe's is a bit too strong).
- Will all the spots chosen in the spot healing still be mapped correctly? i.e will the source points for the spot healing and the area i'm sampling from still be in the correct positions after adjusting for the new lens distortion?
- Does Lightroom allow for this, or do i have to re-do all the spot healing?

Hey Paul,
Well, you could just try it to find out . But the answer is: Adobe adjusts spots (and paint, and red-eye...) to accomodate lens corrections. It's one of the reasons it is recommended to leave lens corrections until last if your Lightroom is performance challenged, i.e. it takes some horsepower.. (me? I like having lens corrections done up front, despite the performance hit).
Rob

Correcting Lens Distortion = 1:1 photos

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