Auto-optimize chromatic aberration settings

This is actually pretty simple to implement, has an obvious interface, and would be very handy.
Add a dropper/crosshairs type tool to the CA module. When touched to the image it will fiddle with the CA settings until the fringing in that area is minimized. This could converge very quickly and accurately in an area like a backlit edge. If it doesn't converge, no big deal, do nothing and let the user try another point.

Yes, and I think version 1 had it too.  The high-end cameras adjust in-camera too when producing jpegs.
There's a lot of talk about proprietary lens tables and encrypted raw files on the internet, but I'm almost certain that these are not required.  If I can remove aberration by adjusting a couple of sliders and the alt/option key at 400% with a squint, without any lens tables, then it must be possible to do this automatically in software by measuring the green/magenta or yellow/blue levels in an image (or part of an image).
Of course, the proof of the pudding would be in how Nikon cameras and Capture NX deals with non-nikon lenses, like Sigma, Tamron, and Tokina.  Do they get corrected too?
There seems to be a trend at Nikon of producing cheaper lenses with quite a bit of lateral chromatic aberration.  It makes good business sense to save money on materials if the effect is easily (and cheaply) fixed in post-processing (as long as the aberration can be removed satisfactorily).  So the problem isn't going to go away; it may even get worse.

Similar Messages

  • New Chromatic Aberration tools kills old settings.

    I've just recently found that new chromatic aberration tools kills settings for old chromatic aberration tools.
    Lets say I have a PV2010 photo with adjusted sliders for chromatic aberration reduction and selected defringe "all edges".
    Now I'm importing this photo to LR 4.1.
    Note: I'm not updating process version!
    Photo is automatically updated by Lightroom to new CA controls (note it still PV2010 photo).
    Well, I must say the the results are superb - they are the same as I was achieving with manual sliders, but now with only one click.
    But the problem is - Lightroom says that metadata have been changed, and I am writing back changes to XMP.
    But now XMP contains settings for new CA tools, but settings for old CA tools are LOST.
    So if I want to open this image in ACR 6.6, or send it to someone with older LR version I end up with completely resetted CA settings, because ACR 6.6 does not have new CA tools, and settings for old tools are killed by LR 4.1 - they are just removed from XMP.
    So I am loosing CA removal settings completely when opening image in earlier version of application.
    And I am NOT updating process version!
    Any comments on this?

    Here is screen shot in which you can see that even PV2010 photo has new CA tools and old ones are gone with their settings applied in LR3.
    I have tried to import CR2 files without any settings in the XMP into newly created empty catalog and have same result.
    When I am switching photo to PV2003 or PV2010 only new CA tools are available.
    And saving metadata to file kills old CA settings and writes settings for new tools (even for PV2010 photo) which previous versions does not understand.
    To my opinion this is very serious bug!
    Here is photoshop feedback message created 5 days ago: http://feedback.photoshop.com/photoshop_family/topics/lightroom_new_cromatic_aberration_to ols_kills_old_settings
    Looks like noone cares...
    Can someone at least say do I am the only person having this issue, or you can see this behaviour too.

  • Canon HF R400 Chromatic Aberration and Blocking Zooming, Hard Time Focusing, LCD Display GUI

    An otherwise nice cam for the price point especially end-of-the model year. I'm going to keep for primarily shooting youtube collectibles in a controlled environment of clamp lights with diffusers and either Auto White Balance or 'P' mode.
    1. In my optical zoom tests (it's nice there's four speed options. I use number 3. The cam exhibits a lot of chromatic aberration which is purple, white ,or even green fringing around the subject matter. I shot of a telephone pole transformer box in bright light, the sky behind it, tree branches and snow on hedges in winter.
    2. On a couple occasions when I zoomed in from about estimated 100-150yds the sky exhibited large blocky pixels for a second. But if I took it to an amusement park to shoot roller coasters I'd hold my breath for both reasons.
    3. It has a hard time adjusting focus when zoomed in even from a close 1-6ft distance to record detail of collectibles or leaves on bushes etc.
    4. The amount of display items on the LCD GUI is too much. Even the cheap Samsung F90 has a button to turn it off. Am I missing something. I read the 197pg PDF manual. Is there a way to turn off or at least reduce the number of items I don't need to see in order to actually shoot a video/picture? In still life tests. I had to take photos with the cam. Look at them. Then adjust. Then repeat. Just to see the composition. Kind of like in the day when pro photographers would take Polaroids prior to the film shot.
    Note: If I'm allow to post youtube links or at least the titles of the videos to demonstrate in the near future when I upload examples of the Likes and Dislikes of my purchase I'd like to know from a Canon moderator (thanx in advance).

    Hi ElectroT2!
    Thanks for posting.
    Chromatic aberration is not always something that can be completely eliminated.  It most often appears when shooting a subject in the foreground that highly contrasts with the background  Chromatic aberration is caused by a lens having a different refractive index for different wavelengths of light.  Because each hue in the spectrum is not focused at a single point, colored halos or fringing appears.  There are two types of chromatic aberration:  longitudinal, where different wavelengths are focused at different distances from the lens, and lateral, where different wavelengths are focused at different positions on the focal plane.
    Are you zooming optically or digitally when you see the "blockiness" in the image?  If digital zoom is being used, it would explain why you see it.  Digital zoom appears as the light blue area of the zoom bar.  When you zoom digitally, the image is basically cropped and expanded more and more as you zoom.  Because of this, the image quality will deteriorate the more you zoom in.  You can select the type of zoom used in the settings menu under [Zoom Type].
    Autofocus may not work well on the following subjects:
    - Reflective surfaces
    - Subjects with low contrast or without vertical lines
    - Fast moving subjects
    - Through wet windows
    - Night scenes
    You can always adjust the focus manually by selecting [ Focus] in the menu.  You can then touch a subject that appears inside the frame, then touch and hold to adjust focus.  When it is focused where you want it, then touch [ X ] to lock the focus.  Something that may help you is when you are focusing manually, you can touch inside the frame to automatically focus on that spot to help you with the adjustment process.
    As for the onscreen displays you are describing, they cannot be disabled so that only the subject appears on the LCD.  You can, however, keep them from being displayed when the camcorder is connected to an external monitor.  The setting is in the menu under the tab.  It is called [Output Onscreen Displays].
    This didn't answer your questions? Find more help at Contact Us.
    Did this answer your question? Please click the Accept as Solution button so that others may find the answer as well.

  • Chromatic Aberration Removal in LR4 is terrible

    I used a manual fixed focal length penatx lens on my Canon 40D and it shows chromatic aerration in the raw file. In LR4 all you can do is check the option to remove chromatic aberration. LR4 did an awful job making it even worse. See before and after image below. The chromatic aberration should have manual controls to adjust it to one's liking. Red/Cyan and Blue/Yellow sliders should be complemented by a Green/Magenta slider in the manual section. Now that would be an improvement on LR3. I loathe chromatic aberration which is unavoidable in many cases. More control over it's removal is a definite must. LR4 has gone backwards. I don't want to have to fiddle with profiles etc to fix this. Just put the controls that were in LR 3 back and add a green/magenta slider please.

    I'll try the moire brush as suggested.
    I am trying to emphasise the point that the software should be moving forward. That means new tools or upgrades should avoid adding artifacts as much as possible and certainly upgrades to existing tools should not perform worse than the original tool. I have found an example here where it does with chromatic aberration removal where an artifact is formed.
    It's interesting that some of the commentary above almost suggests that chromatic aberration removal should be an adjustment brush. The user could then isolate the edges that he/she wants to remove the coloured fringes from. Then there should be the ability to choose which colour shifts are required red/cyan, blue/yellow, or green/magenta.
    It looks like the current tool may improve some edges while making others worse. If checking the choice of automatic aberration correction doesn't work - then one has to go to another external editor to fix the problem - not the most satisfactory result of an upgrade. I like the suggestion in another thread of having both the option of auto and manual control options - much like exposure control. Photographers like manual control of image enhancements.
    I have chosen to take pictures that have extreme aberrations to test the robustness of the tool. I have shot pictures with high contrast lighting, with older cheaper glass, and with the aperture wide open. I'll try to get some pictures to Eric as mentioned above.

  • Is there a chromatic aberration or purple fringing tool in PSE 10?

    The subject line basically says it all.  The chromatic aberration tool in Aperture doesn't do much for me.  Is there one in PSE 10?  Thank you.

    Well, PSE's implementation of ACR can help correct chromatic aberration somewhat.  Here's the original image from somegirl's web site:
    Using these settings:
    Results in this:
    Not great, but better than I expected.
    Ken

  • Better chromatic aberration repair than ACR? Plugin?

    I've suddenly (and sadly) become wise to the existence of chromatic aberration in my images. I'm finding that it's different from image to image - undoubtedly due to different lenses, zoom setting, etc.
    I've been using ACR's chromatic aberration fix to generally good effect, but since it's different from image to image, it's not possible to just save settings as a template to use with every image. It's not a LOT of work to tweak each image, but I was wondering whether there was any "miracle" CA-fixing plugin out there that I should know about. Similar to how Noise Ninja seems to do a better job with noise than Photoshop's built-in tools.
    Any recommendations?

    http://www.dxo.com/us/photo/dxo_optics_pro
    It's expensive, but works wonderfully.

  • Zoom does not reflect Chromatic Aberration in Develop

    Hello
    Have anyone noticed that in LR 1.0 (last build) the chromatic aberration correction shows up correctly if image is zoomed (for precise correction) but remains the same (not corrected) if the "fit" zoom is restored?
    I corrected some .ORF (Olympus) RAW and found that if zoomed the correction (after playing with CA cursors) is ok (no more visible red/green fringe) but restoring the default zoom to see the full image doesn't show the corrections made. And the aberration is very strong so is visible even at "fit" zoom.
    Does the Develop module not resample/redraw the image using a preview?
    I think can be misleading to correct CA and not see changes reflected at all zooming.

    Great.
    These changes aren't viewable in the Develop module, except at 1:1. Gee, real helpful for 24 megapixel images... viewing at 1:1 that is. Unless, of course, I have a 42" high-quality LCD that, oh, doesn't exist yet.
    And the Library module will probably just show the image with banding/JPEG macroblocking, so, no use there.
    So, looks like the only option to view your CA/noise/sharpening-adjusted image fitted on your screen in high quality is to first EXPORT the file then VIEW in a viewer OTHER than LR.
    Fascinating, how LR is such a wonderful image EDITOR, but is worse than just about every other piece of software out there for VIEWING.
    Sorry, but even hyperbole doesn't suffice here. It's really just shocking that LR is the crappiest image *viewer* I've seen to date.
    Actually, more shocking to me is that it seems that people *don't even care* about LR's sub-par viewing capabilities. Save for all my posts and one corroborating post by Andrew Rodney & another one by someone I can't remember (apologies!) -- no one has complained about the ridiculously horrid image quality when viewing images outside of the 'Develop' module. I mean, for a program that's all about 'aesthetics' and 'focusing on the image' (lights out mode, etc.), why show me a sub-par view of my images? Aren't my images the most important part of the whole picture??
    And what's with all these optimizations for speed? Cutting corners here and there for speed...? On my 5400RPM hard drive MacBook Pro (ok, fine, Core 2 Duo w/ 2 GB of RAM), LR is *blazing* fast and I work with 120MB 16-bit film scans and I NEVER find myself sitting around for LR to perform a calculation, etc. It's *fast enough*... now how about putting some emphasis on *quality* back into the program rather than crippling the program so it runs faster (or not, if you have a decent machine anyway)?
    Or how about at least giving us the *option* to enable purportedly 'high-end' features like, uh, viewing an image in full quality when presenting a slideshow to friends, or, *gasp*, PAYING CLIENTS...!!
    Gosh I love Lightroom, and have mad respect for the developers... they are brilliant, intelligent, revolutionizing everything. But, man, sometimes these fundamental omissions, and lack of their recognition by the community at large, drive me insane!
    Many apologies for the rant, since I know some people out there would like to bite my head off for being so caustic :-P
    -Rishi

  • Presets for chromatic aberration correction?

    I've been wondering about this one for a while - is this actually possible?
    I believe that it hinges on the following - I know c.a. varies based on focal length, so I'd have to create a preset for each possible focal length from my zoom as I happen to use them.
    But, does it also vary within a focal length by the focus distance?  In which case, a preset is clearly not possible.
    Thanks for any help.
    Selby

    I'd love to see geometric distortion, vignetting and chromatic aberration correction based on lens/camera combination built into Lightroom.  I happen to be a Canon owner and though this functionality is available in Canon's Digital Photo Professional software, using it does mean a trip through Yet Another Program.  Having everything integrated in lightroom makes life a lot easier (just think of Lightroom's excellent integration of ACR functionality).
    BTW: there is an open thread called "Auto Chromatic Aberration Correction" in the "Lightroom Feature Requests" forum.  You might consider posting your request there.
    $$PhotoHobby

  • Chromatic Aberration tools are missing...

    A few days ago I got a notification about a new Camera Raw update. I told it to go ahead and install it. After it was done I got back to work. That is when I noticed my Chromatic Aberration tools were gone. The tools for fixing lens distortion and everything were still there, just the chromatic tools were MIA. Is this just me, or is this something that was planned for some reason? I have checked and tried everything short of uninstalling and reinstalling Photoshop and Bridge to fix it. Anyone else have this issue?
    Oh btw, I'm on a mac running Snow Leopard

    Look for an Auto-CA checkbox in the lens correction area.
    Lateral-CA is caused by the red, green, and blue channels having a slightly different size on the sensor.  This was fixed by the manual-CA sliders and is now fixed by the Auto-CA capability.
    Axial-CA is caused by the red, green, and blue channels focusing at slightly different points.  This will be fixed by defringing tools.

  • Auto optimizer stats collection enabled, but not running and not showing up

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  • Lr and NEF Chromatic Aberration

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  • Edit in photoshop loses chromatic aberration corrections

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    Can anyone assist me in using chromatic aberration tools in removing purple fringing completely from images?  I have had limited success in using the slider , but in zooming in at 100% I can still see slight purple fringing in image . i tried brushing in but that did not seem to remove purple fringing completely.

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