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.

Similar Messages

Lens Distortion Removal presets?

I have read that there are specific camera lens distortion removal presets coming to the new version of Premiere Pro CC 2014. I do not see them yet, is this still in development or can i download these presets somewhere on the website? I am looking for GoPro Hero 3 Black lens correction profile specifically.
Thanks!

Yes, I see them now! I had these filters blocking my preset folders options. Thank you Jim

Lens Distortion Removal Presets GoPro Hero4

In Premiere Pro CC I have the following Lens Distortion Removal presets for GoPro:
- Hero2
- Hero3 Black
- Hero3+ Black
I have a GoPro Hero4 Silver. Where and how do I get the presets for that camera?

One option is to use the GoPro Studio software to transcode the GoPro source videos to .avi for PC or .mov for Mac, which makes editing much easier for many systems. With the added benefit of having a check box for Fisheye Removal, so clip is "ready to edit" in Premiere and not worry about it at that point.
Thanks
Jeff Pulera
Safe Harbor Computers

Hi, i'm a new member of this community. I've recently learn about flashback malware and other threats to Mac devices. I've installed the new Mac OS X update for Lion 10.7, and the flashback removal tool. what about the update for Flash Player?

Hi,
i'm a new member of this community. I've recently learn about flashback malware and other threats to Mac devices. I've installed the new Mac OS X update for Lion 10.7, and the flashback removal tool. What about the update for Flash Player? Should i install it? Otherwise, should i permanently remove this app?
I realy need some advice.
Thank's to all.

Be sure to install the latest version of Safari (version 5.1.7) which is available via Software Update (in the Apple menu) if you have not already installed it. This update will automatically disable older versions of Flash when new versions are available, and will instruct you on how to install the latest version on your system. This should help keep your system safe from any vulnerabilities in Flash.
Note that this is only useful if you use Safari, though other browsers have their own update mechanisms you should research and enable or configure to your liking.

Exposure and lens distortion slightly different after photoshop edit

I'm pretty new to Lightroom and Photoshop, I have a pretty good understanding of Lightroom but not much with Photoshop yet. I opened a photo that I edited the way I want including lens correction, exposure, etc. from lightroom into photoshop, did some editing with the patch tool to fill in some bare grass area on an exterior shot, then saved photoshop file as psd file in photoshop, then closed file and went back to lightroom, the photo seams to have a slightly different lens distortion not the way I want and different exposure compared to my original edited raw image. Why is this happening? why does photoshop slightly change the lens distortion?

Is LR applying lens distortion, again, by default, perhaps also vignetting correction which would change the exposure especially in the corners?
Most lens profiles that contain information about geometric and vignetting corrections are for raw files only, but a few also have non-raw versions. it is possible that your LR defaults say to apply lens corrections whenever a file is imported and for the lens you're using there are both raw and non-raw lens profiles.
A simple way to tell if this is occurring is to go to the Lens Corrections / Profile tab and see if Enable Profile Corrections is checked or not, and if it is, turn it off and see if the image is more the same as the original raw + your PS patch work.

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.

Perspective correction and scaling in y direction only

Nach einer starken vertikalen Perspektivkorrektur werden Gebaeude "zu hoch".
Wie skaliere ich das Bild nur in y-Richtung ?
After applying vertical perspective correction for tall buildings, the buildings get "too tall".
How do I down-scale the vertical extent of the "corrected" image ? (no global scaling) ?

That is not possible in Lr, only in Photoshop CSxx.
Also, in Photoshop CSxx you can extend the canvas at the top, so that he top of the building does not go beyond the image top margin.

My screen view is too wide, causing me to slide view bar constantly. I want the web page to fit correctly and keep my upper tool bars.

How do I set Firefox so that when I am viewing web pages, I do not constantly need to re-zoom the new page, or, use my bottom slide bar from side to side just so I can read the information I am looking for?
My preference would by the page to "JUST FIT"my screen. And of course, keep my work bars where they are at top and bottom.
I am running Windows XP, I am using a "ASUS wide screen monitor. (A VS197 LCD)

There are add-ons like [https://addons.mozilla.org/en-us/firefox/addon/readability/ Readability] which reformat a page more thoroughly, but I don't know whether there is one which changes the page's width settings to fit within your window.
If most pages look right at a certain reduced zoom level, you can use an extension to set that as your standard zoom level.
For example:
* [https://addons.mozilla.org/firefox/addon/default-fullzoom-level/ Default FullZoom Level]
* [https://addons.mozilla.org/firefox/addon/nosquint/ NoSquint]

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 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

Perspective Control and Distortion Controls in Camera Raw

I love ACR 4.1. Thanks for a fine product.
For a future release of ACR, is it beyond the bounds of possibility to include the Perspective, Vignette and the Distortion controls directly into ACR?
Thanks

>PTLens will get all the info from the EXIF data to select the right camera/lens/FL combo
The Exif data contains only the actual focal length and the maximal aperture value of the lens. These are not enough to identify the lens.
The MakerNote tag may or may not contain some more lens related information, but
1. in most images this is not present (it is not part of the Exif tags),
2. the structure of that data is not published,
3. there is a DNG tag, LensInfo, Adobe's DNG converter creates this tag from the MakerNote, but it contains only the min/max focal lengths and the respective max. apertures. This is still not enough to identify the lens, apart from the fact that the max aperture values are not filled for example in case of Canon lenses and Tamron/Sigma lenses on Canon body (I can state this with certainty only re Canon 20D and 1DsMarkII). Nikon's D100 and D2X shows the max. aperture values.
4. all this is still not enough to identify the lens.

Perspective correction

Hi,
I know that LR does not have perspective correction and that it has been requested as a feature, but in the meantime I would like to know what people recommend for such correction.
I have Photoshop Elements v4.0 for Mac which I can use to host a plugin, but if people think a standalone program is better then I could use that.
Looking forward to your suggestions.
Andrew.
Mac mini 2GB RAM, Mac OSX 10.4.10, PSE v4.0 and LR1.1

Check out
DxO. If you know what you are doing, you can try the free
Hugin or the (not so free) lens correction tool in photoshop.

Lens distortion presets are missing in Premiere Pro CC 7.2.2

Lens distortion removal folder is missing completely. Can anyone suggest how to fix it? Perhaps there is a way to download those presets separately?

Jim, thanks for your reply. I'm talking about Lens distorition removal forder located in Presets. I believe that they are configs/presets for the Lens Distortion effect located in Distort folder under Video Effects. By the way, distort effects are available to me, but not the presets.
I've found out about the new presets at Lynda - http://www.lynda.com/Premiere-Pro-tutorials/Removing-GoPro-lens-distortion/126763/169090-4 .html
So, my question still stands.

Lens Distortion Non-linear Distortion and Perspective Distortion

Hello everyone, I'm a member of the vision team in the Intelligent Ground Vehicle team in Cal State Northridge, an autonomous robot that uses real time feed and laser data as sensors.
So we need a fully undistorted video feed for us to do image analysis with the lowest processing time.
We have a distortion situation with our current vision system where we have to fix Non-linear Distortion due to the use of a wide lens ( About 144 Deg ) and also Perspective Distortion of the projected image. The camera is mounted on top of our robot with an angle with the ground (about 45 Deg).
I have been using labview for about 6 months, and have been trying to correct this distortion using Vision Assistant program to generate VI's.
First I'll list my attempts here and then I will direct some questions.
First attempt, a picture of a dot grid was taken with our camera and that picture was correct by Vision Assistant's nonlinear image calibration. Then a VI was generated by Vision Assistant, and we changed in the input from images to video.
This method worked but not accurately.
Second attempt, we tried to remap the image pixels using a correction function generated through Excel, this method did not work accurately either. I'm not even sure how to do this again since it was done in the past.
So my questions are here:
1) what's the best approach to correct the distortion in our camera? and how please.
2) what are we doing wrong/right in general?
3) Generally, how would I improve any vision VI to reach faster processing times?
Everyone's help is very much appreciated,
Omar
Cal State Northridge
The Intelligent Ground Vehicle team
[email protected]

I'd like to correct the information provided by Bruce. It was correct up til Vision Development Module 2010. You need to update, Bruce ;-)
In Vision Development Module 2011, we improved the accuracy and precision of our grid calibration, by computing a lens distortion model (Division or Polynomial Model), that take into account radial and tangential non-linear distortion of the lens. The new algorithm also allows to compute the internal parameters of the lens (focal length and optical center), that you can use to determine the relationship of the camera to the object under inspection.
The microplane algorithm that Bruce described is still availale, as it can be used to solve applications in which the object you're trying to calibrate is non planar, and can be calibrated by wrapping the grid around the object.
A calibration will be valid for a specific perspective plane, and will need to be recomputed if the camera moves or object is in a different plane.
Typically, the calibration process is an offline process. For performance reasons, you don't necessarily want to correct the entire image (although VDM provides you with that function). As Bruce mentioned, most algorithms, like edge detection, pattern matching etc, return their data both in pixels and real-word data, talking into account the calibration information that you learned. For the few algorithms that only provide pixel results, you can use VIs to convert Pixels to Real-World. This operation is fast.
What type of features are you trying to measure in the image? Can it be solved in 2D, or do you need 3D information? How many cameras do you have on the robot?
-Christophe

Hello I have the Latest version of Adobe Lightroom 5 to date (8/26/14) however just recently when I open the develop tab I'm missing two options on the right side column "Lens correction" and "Effects" I do not know I've hit some setting to remove those

Hello I have the Latest version of Adobe Lightroom 5 to date (8/26/14) however just recently when I open the develop tab I'm missing two options on the right side column "Lens correction" and "Effects" I do not know I've hit some setting to remove those options or if this latest version deleted those options? Any help would be greatly appreciated and please excuse my ignorance :/

Right click next to one of the other headers and you will get a pop-up to enable the missing ones.

Perspective correction and Lens distortion removal tools

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