Wallpaper question...

Discussion in 'Digital Photography' started by trevor4ever, Apr 19, 2018.

  1. trevor4ever macrumors newbie

    trevor4ever

    Joined:
    Oct 31, 2017
    Location:
    MN
    #1
    Hi, if this is in the wrong forum I apologize. I'm wondering if someone could help me with photo editing. I have a bunch of photos that I'd like to use as desktop wallpaper. I have a dual screen setup with a 4k monitor and my MacBook pro. Is there a way to split 1 photo into 2, so that I could have the proper resolution on each screen. If that is confusing, take a look at the dual monitor wallpapers at twelvesouth. There you can pick a wallpaper for each monitor in the proper resolution. I love it but just want to use some of my own photos. Thank you for any help!!!

    https://www.twelvesouth.com/wallpaper
     
  2. casperes1996 macrumors 68040

    casperes1996

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    #2

    just duplicate the file and have two separate files in two separate resolutions? I don't see what the challenge there is.
     
  3. kenoh macrumors demi-god

    kenoh

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    Location:
    Glasgow, UK
    #3
    Hmm first hurdle is that your MBP is not a 4K screen. It is also a different size so it isnt that straight forward. 4K is a resolution of 3840x2160

    If you have 2 monitors the same size and 4k resolution, you need to make an image 7680x2160 in resolution - so for most cameras, a panorama image to get the width.

    Once you edit your image and size it to this resolution, you then cut it in half vertically into two images name one left and one right, then set each one to the respective screen background.

    Same approach for the MBP, except you have to play around with its half of image to get them to look rightly aligned...and there is the rub all of that alignment magic is dependent on where you put your MBP and how seamless you want the effect.

    I would file that under too much hassle. Hope you work it out.
     
  4. casperes1996 macrumors 68040

    casperes1996

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    #4

    I don't think the resolution is such a big issue, but the different aspect ratios could be a bit tricky to make look right, seeing that the 4k is presumably a 16:9 4k and the MBP is 16:10. But if it doesn't matter that the MBP side of the photo has more top and bottom, it's fairly easy to do.
     
  5. kenoh macrumors demi-god

    kenoh

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    #5
    Also if the 4k monitor is a 24,27,32 inch screen then it will be longer edge so the images wont "flow"...

    OP needs to have a bash to try it out... @trevor4ever have a go, post results...
     
  6. trevor4ever thread starter macrumors newbie

    trevor4ever

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    #6
    Yeah I’ll let you guys know. Not sure if any of you tried the link. But when I download the correct pictures, the panoramas match up seamlessly from my monitor to my MBP. It’s just a nice pleasant setup. With decent cameras in the iPhones, I have a ton of great panorama shots that would look awesome spread nice and perfectly across my desktop. Thanks for the input!!
     
  7. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
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    Horsens, Denmark
    #7
    I see that some of the photos in the link are also on widely different screens, and they just crop the top on the MBP.

    If that's what you want, it's not that hard really. For your MBP just chop off a section of 2880x1800 (assuming 15" MBP), and and from the edge of that, chop off your 3840x2160 (assuming UHD 4k display, and not DCI-4k)
     
  8. trevor4ever thread starter macrumors newbie

    trevor4ever

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    #8

    Thanks I’ll give it a try!
     
  9. kenoh macrumors demi-god

    kenoh

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    #9
    If the match up then it is the easy method... Wide pano cut in half, then left and right half set to wallpaper on each screen accordingly.
     
  10. trevor4ever thread starter macrumors newbie

    trevor4ever

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    MN
    #10

    Yep thats the plan, but the problem lies with different resolutions on the screens. If they were the same, the pictures would line up perfect. But even though the pictures should line up, the change in resolutions screws things up. So I do want to take my widescreen photos and cut them in half, followed by changing the resolutions appropriately in each image. And I'm not sure how to do that. Thanks for the help!
     
  11. kenoh macrumors demi-god

    kenoh

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    Location:
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    #11
    Yeah that was my badly made point earlier.

    But if you take your left hand image (assuming mbp is the left hand for less typing here)...


    Now as for the scale so it perfectly aligns to the other, then you need to calculate the pixels per inch on both displays vertical resolution divided by the height of screen, then work out the resolution that the MBP image should be to give same pixels per inch, then If you get your two images, then take the left hand one and use photoshop to crop it so it is the right resolution - chop the bottom off. Then maybe it will work

    This is a crap description of what i mean... Will try again later when i try it myself.
     
  12. trevor4ever thread starter macrumors newbie

    trevor4ever

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    MN
    #12
    Ahh I see what you’re saying. I’ll try when I get home later. Thanks for helping much appreciated
     

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