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Highlight Recovery Issue

Kommentare

17 Kommentare

  • Ian Wilson
    Moderator
    Top Commenter
    I sometimes find that highlight recovery on bright parts of clouds ends up with a yellowish colour. (Actually, if you look at bright bits of clouds, they really are yellowish, but in the photo I agree it doesn't look right.) My most recent theory of how to remedy it is to draw a mask over the clouds, apply a Luma range to it to affect only the very brightest parts, and desaturate them which turns the yellow white.

    I have no experience with trying the same things in other software, so I don't know how it compares.

    Ian
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  • SFA
    I have a Canon 600D (used mainly for fully manual lenses) that can produce some cloud shots with a slight pink colouration in blown or nearly blown highlights.

    Strangely I can take to identical shots fractions of a second apart and one will show a tendency towards pink but the other can be just white. Same setting reported in the EXIF data. My 1D3 never has this problem so I see it as a camera specific issue.

    I tend to use the Linear curve for RAW processing since it usually offers improved highlight recovery.

    I also check the White Balance value in case the camera has set a less than optimal value for temperature or tint.

    I then check the Levels value for the RED channel and almost always find a small but significant up tick at the high end in the histogram (even after Auto Levels is applied although that will often resolve the problem.) So a small colour channel based levels adjustment can help.

    It is tempting to set a revised default preset or style to always be applied for that camera on import - but since the problem does not always appear it may not be a good idea.

    Manually applying a saved preset or style based correction may be possible but for the number of times I see it and because of slight variations in the effect I just find it easier to fix in the set of images I am working in and then more often then not update later images using a settings copy and paste - something I usually do anyway.

    The only time I see a yellow tint tends to be from a single manual wide angle lens (it may be something to do with the coating on the lens - I'm not sure) and that can be corrected using one of the colour adjustment tools according to one's personal reference.

    HTH.

    Grant
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  • NN635374224101128000UL
    Hi Grant, thanks for taking the time to respond. I have been thinking it through and I check the ISO I used, I had used extended ISO of 100 on the G80. It seems the extended ISO drops the dynamic range down, so highlights are harder to recover, if at all. So it seems it could be to do with using the expanded ISO and why it does it in various software all be it a different colour. Lightroom must have dealt with this issue somehow as with DXO. I will test this out if I get a chance later on some bright sky areas (if there is any) on both 100 and 200 ISO.

    Again thanks for the reply, much appreciated.

    Bob
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  • IanS
    [quote="NN635374224101128000UL" wrote:
    Hi, first post and first issue with the trial I had. Some images that I am guessing have lost all data in the highlights on trying to recover the detail I get areas of yellow in where I guess the lost data is. If I try the same image in Lightroom it just stays white when trying to recover the details.
    I am looking to stop using Lightroom and have tried a few alternatives with 2 of them doing a similar thing, but bright pink instead of a faded yellow.

    I prefered the image quality given by Capture One, but this is at present the showstopper ☹️

    The camera is a Lumix g80.

    Thanks in advance.


    With any difficult images try using the linear curve (under the basic characteristics tab), in place of the default auto curve.

    You also need to embrace the fact that C1Pro is not LR. Its design philosophy is different and uses curves, levels and layers extensively. If you are not comfortable with levels and curves, which is how PS works, then you will likely experience problems. Just post here and others will help.

    There are many things you need to be aware of such as the linear curve, for example you don't get a slider marked vibrance but the saturation slider under the exposure tab works he same as vibrance when positive values are applied.
    Levels and curves are how you set your white/black point, gamma etc.

    Ian
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  • NN635374224101128000UL
    [quote="Ian3" wrote:
    I sometimes find that highlight recovery on bright parts of clouds ends up with a yellowish colour. (Actually, if you look at bright bits of clouds, they really are yellowish, but in the photo I agree it doesn't look right.) My most recent theory of how to remedy it is to draw a mask over the clouds, apply a Luma range to it to affect only the very brightest parts, and desaturate them which turns the yellow white.

    I have no experience with trying the same things in other software, so I don't know how it compares.

    Ian


    Thanks for your response... I have been digging and it seems I am not the only Lumix G80 person facing this issue, it seems however that it could be linked to the extended ISO 100 causing the issue as they took the same shot at both 100 and native 200 and only had the yellowing at 100. I have done the mask adjustment as you mention but it would be nice to not have to 😊
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  • NN635374224101128000UL
    [quote="IanS" wrote:
    [quote="NN635374224101128000UL" wrote:
    Hi, first post and first issue with the trial I had. Some images that I am guessing have lost all data in the highlights on trying to recover the detail I get areas of yellow in where I guess the lost data is. If I try the same image in Lightroom it just stays white when trying to recover the details.
    I am looking to stop using Lightroom and have tried a few alternatives with 2 of them doing a similar thing, but bright pink instead of a faded yellow.

    I prefered the image quality given by Capture One, but this is at present the showstopper ☹️

    The camera is a Lumix g80.

    Thanks in advance.


    With any difficult images try using the linear curve (under the basic characteristics tab), in place of the default auto curve.

    You also need to embrace the fact that C1Pro is not LR. Its design philosophy is different and uses curves, levels and layers extensively. If you are not comfortable with levels and curves, which is how PS works, then you will likely experience problems. Just post here and others will help.

    There are many things you need to be aware of such as the linear curve, for example you don't get a slider marked vibrance but the saturation slider under the exposure tab works he same as vibrance when positive values are applied.
    Levels and curves are how you set your white/black point, gamma etc.

    Ian



    Thank you for taking the time to respond. I will spend some more time trying to understand the software more as I like the imported look far better than Lightroom especially the noise control and clarity to the photo.
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  • Luke Miller
    In many cameras extended ISO settings reduce dynamic range, so highlights can clip that would not clip at base ISO. When I experience color shifts using the highlight recovery tool it is invariably because one or more of the color channels has blown out. Highlight recovery then has only the data from the remaining channels to work with and a color shift results.
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  • Permanently deleted user
    [quote="Luke_Miller" wrote:
    In many cameras extended ISO settings reduce dynamic range, so highlights can clip that would not clip at base ISO. When I experience color shifts using the highlight recovery tool it is invariably because one or more of the color channels has blown out. Highlight recovery then has only the data from the remaining channels to work with and a color shift results.

    Good explanation, this seems most likely to be the cause.
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  • NN635374224101128000UL
    [quote="Luke_Miller" wrote:
    In many cameras extended ISO settings reduce dynamic range, so highlights can clip that would not clip at base ISO. When I experience color shifts using the highlight recovery tool it is invariably because one or more of the color channels has blown out. Highlight recovery then has only the data from the remaining channels to work with and a color shift results.



    Thanks, yes I think you are correct 😊
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  • Christian Gruner
    Please send our support team the file (or a few different ones) where this is possible to repro. We should be able to fix this given the right examples.
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  • NN635374224101128000UL
    [quote="Christian Gruner" wrote:
    Please send our support team the file (or a few different ones) where this is possible to repro. We should be able to fix this given the right examples.


    Thats great I will try and find a few where this happens, as I said I think the area has potential no data but rather than just going white it has a faded yellow tint. If I remember On1 Photo Raw when I tried it turned the areas pink which was a lot worse. Lightroom just drops then to white. Is it better to send the RAW files direct or can I attach them on this thread, if direct could you give me the contact details please?

    Thanks for your help.
    Bob
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  • Permanently deleted user
    Could it have something to do with your output profile?
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  • NN635374224101128000UL
    [quote="C-M-B" wrote:
    Could it have something to do with your output profile?


    Output from camera?
    Its a RAW file straight from camera and I see this on screen before saving.
    All settings are standard and as installed.

    Thanks
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  • Permanently deleted user
    No the output color space/profile. Maybe you have Receipe Proofing activated.
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  • NN635374224101128000UL
    [quote="C-M-B" wrote:
    No the output color space/profile. Maybe you have Receipe Proofing activated.


    Hi

    I saw that as a possibility when it first happened, so turned on and off without any change.

    Thanks

    Bob
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  • NN635374224101128000UL
    [quote="NN635374224101128000UL" wrote:
    [quote="Christian Gruner" wrote:
    Please send our support team the file (or a few different ones) where this is possible to repro. We should be able to fix this given the right examples.


    Thats great I will try and find a few where this happens, as I said I think the area has potential no data but rather than just going white it has a faded yellow tint. If I remember On1 Photo Raw when I tried it turned the areas pink which was a lot worse. Lightroom just drops then to white. Is it better to send the RAW files direct or can I attach them on this thread, if direct could you give me the contact details please?

    Thanks for your help.
    Bob


    Here is link to files... anyone can check it if they like.
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  • SFA
    [quote="NN635374224101128000UL" wrote:
    [quote="NN635374224101128000UL" wrote:
    [quote="Christian Gruner" wrote:
    Please send our support team the file (or a few different ones) where this is possible to repro. We should be able to fix this given the right examples.


    Thats great I will try and find a few where this happens, as I said I think the area has potential no data but rather than just going white it has a faded yellow tint. If I remember On1 Photo Raw when I tried it turned the areas pink which was a lot worse. Lightroom just drops then to white. Is it better to send the RAW files direct or can I attach them on this thread, if direct could you give me the contact details please?

    Thanks for your help.
    Bob


    Here is link to files... anyone can check it if they like.


    Hi Bob,

    If you have not already tried to create a Support Case you should so do and there you will see the opportunities to send files.

    I have downloaded and looked.

    The thumbnails provided by Amazon in my Firefox browser look more or less OK for the first 2 files but the 3rd has a vary pink sky. It reminds my of some of my Canon 600D random results - only more so.

    However, once downloaded and opens in C1 (Just at the moment I am finishing some work on V11.2 ather than V12, the first 2 look fine and I can gains some detail from the sky. The third one also looks fine but offers more detail in the clouds which, if I push things, show a slightly golden tinge which looks quite natural in the circumstances although I would have to ask whether the time setting in the camera was correct for wherever the shot was taken. All three shots seem to have potential for the golden frnge.

    Some comments.

    I see pink where the empty branches have the almost blown out sky as background. I think this is due to compression for viewing size. If I zoom to 50% or more the effect pretty much disappears with nor attempt at correction.

    On the second image you have Exposure Compensation +1.7 set and on the third +.7

    I have no idea it that is important for the problem under discussion.

    Looking at the Histograms one can see s slight uptick towards the white end and then a very noticeable uptick right up around 250 to 255 in the RAW file using the Linear Curve profile.

    Look at the Exposure Evaluation tool and the the Histogram and the histograms that appear with the Levels and curves tools.

    These upticks, no matter where subsequent processing places them, appear for the values that relate to the cloud edges with the nice golden tint.

    All of that said, since I'm not really seeing any obvious problems with the images (unless the golden tint should be white as you remember it) I'm not sure that I am offering much of help for your problem.

    Suffice it to say that whether I just load the images with the "Film Standard" ICC curve as set by the load (I have not imported - I am using a session ) or create a variant and develop settings based on the Linear curve makes no difference and no pink sky is observed.

    How are other doing?


    Grant


    ETA: I should probably note that I am using a 6 years old Dell notebook with a very low power Quadra GPU of the time together with Windows 7 Pro. C1 11.3 at this time while I am trying to finish of some old projects.
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