Photoshop Sky Polarisation Fix?

Discussion in 'Graphics Programs and Photo Gallery' started by weepete, Oct 22, 2017.

  1. weepete

    weepete TPF Supporters Supporting Member

    Joined:
    Oct 18, 2011
    Messages:
    4,128
    Likes Received:
    1,276
    Location:
    Glasgow, Scotland
    Can others edit my Photos:
    Photos OK to edit
    I've got a panorama I shot while on holiday this year that needs a bit of a fix in PS. Basically I left my polarising filter on (D'oh) and now have an oval dark patch in the sky which fades out to a lighter sky tone at the edges. I've came across a sort of fix by adding a gradient but I was wondering if anyone knew if it's possible to use channels to create a mask using the tonal variations then invert it to lighten up the dark areas according to their tonal values?

    I've used a bit of PS but I'm not fully conversant in it so though I've tried some internet searches I can't seem to find the right termonology.


     
  2. snowbear

    snowbear Big Furball Supporting Member

    Joined:
    Dec 9, 2006
    Messages:
    12,784
    Likes Received:
    4,432
    Location:
    SoMD
    Can others edit my Photos:
    Photos OK to edit
    You should be able to. I've done something similar with (under)exposure adjustment layers to de-emphasize the background. It's worth a shot.
     
    • Like Like x 1
  3. kalgra

    kalgra TPF Supporters Supporting Member

    Joined:
    Jan 11, 2015
    Messages:
    399
    Likes Received:
    270
    Location:
    Denver
    Can others edit my Photos:
    Photos NOT OK to edit
    Do you have an example image to share?
     
  4. goooner

    goooner Been spending a lot of time on here!

    Joined:
    Oct 4, 2014
    Messages:
    2,205
    Likes Received:
    971
    Can others edit my Photos:
    Photos OK to edit
    Have you tried the graduated filter in LR? I've used it a couple of times. Some good youtube videos about that too.
     
  5. weepete

    weepete TPF Supporters Supporting Member

    Joined:
    Oct 18, 2011
    Messages:
    4,128
    Likes Received:
    1,276
    Location:
    Glasgow, Scotland
    Can others edit my Photos:
    Photos OK to edit
    Thanks snowbear, any chance you remember how you did it? I'm mucking about with various channel and levels to try and get a refined mask currently
     
  6. weepete

    weepete TPF Supporters Supporting Member

    Joined:
    Oct 18, 2011
    Messages:
    4,128
    Likes Received:
    1,276
    Location:
    Glasgow, Scotland
    Can others edit my Photos:
    Photos OK to edit
    No, not at the moment anyway, The polarisation effect with UWAs and panoramas is pretty well known, its a dark patch that fades out to the sky colour. If your convinced you really need to see it though I'll post up the affected area.
     
  7. weepete

    weepete TPF Supporters Supporting Member

    Joined:
    Oct 18, 2011
    Messages:
    4,128
    Likes Received:
    1,276
    Location:
    Glasgow, Scotland
    Can others edit my Photos:
    Photos OK to edit
    Yes and no, I'm familiar enough with that filter and even with the new luminance masking and colour options it doesn't refine the mask well enough for my liking. It's really a photoshop job IMO.
     
  8. snowbear

    snowbear Big Furball Supporting Member

    Joined:
    Dec 9, 2006
    Messages:
    12,784
    Likes Received:
    4,432
    Location:
    SoMD
    Can others edit my Photos:
    Photos OK to edit
    It was a couple of versions ago, but I create a new adjustment layer, adjust the exposure then "paint" the mask. IIRC, if inverted it was like erasing the new layer from what you wanted original.

    I'll have to play around with the new PS version to get the right process - New adjustment layer is still the same. If I get it I'll put together a couple screen shots.
     
    • Like Like x 1
  9. snowbear

    snowbear Big Furball Supporting Member

    Joined:
    Dec 9, 2006
    Messages:
    12,784
    Likes Received:
    4,432
    Location:
    SoMD
    Can others edit my Photos:
    Photos OK to edit
    You aren't going to be trying to darken part of the image, but the general process should help.

    1. Open the image, turn on the "Layers" panel. Make sure the background is locked to keep it safe.
    orig.jpg

    2. "New Adjustment Layer" and pick the adjustment you want. I've only worked with Exposure or Brightness/Contract.
    new_layer.jpg

    3. Pick the editing tool of your choice - I use the brush tool, and set the size appropriate to what area I need to unmask. Make sure the mask (white rectangle) is selected in the Layers panel and paint. I am basically erasing (unmasking) what I want to keep original. Inverting the mask will do the opposite - paint what you want to change.
    unmasking_1.jpg

    4. I adjust the brush size and zoom as needed.
    unmasking_2.jpg

    5. Flatten the layers, and save to a new file.
    final.jpg
     
    • Like Like x 1
    • Informative Informative x 1
  10. weepete

    weepete TPF Supporters Supporting Member

    Joined:
    Oct 18, 2011
    Messages:
    4,128
    Likes Received:
    1,276
    Location:
    Glasgow, Scotland
    Can others edit my Photos:
    Photos OK to edit
    thanks Snowbear! I hadn't realised you could mask adjustment layers like that. I'll give it a go tomorrow and see what I can do with it
     
  11. snowbear

    snowbear Big Furball Supporting Member

    Joined:
    Dec 9, 2006
    Messages:
    12,784
    Likes Received:
    4,432
    Location:
    SoMD
    Can others edit my Photos:
    Photos OK to edit
    I'm looking forward to seeing how it turns out.
     
  12. Sunny_girl

    Sunny_girl TPF Noob!

    Joined:
    Jul 10, 2017
    Messages:
    3
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit


    I would recommend to try mask of 3D Lut Creator 3D LUT Creator - official site. Here is video tutorial how to work with it . There is also this video tutorial about how to make sky darker maybe it also would help you
     

Share This Page