Eliminating Background ??

Discussion in 'Digital Photography' started by Apple Corps, Dec 27, 2008.

  1. Apple Corps macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #1
    I have a photo of the earth and need to remove the black background behind it - winding up with the circular image of earth. The magnetic lasso in Photoshop is very very tedious and requires some skill (or patience) that I don't have :rolleyes:

    Is there a better tool than magnetic lasso to use?

    Some detailed guidance would be most appreciated.
     
  2. jmann macrumors 604

    jmann

    Joined:
    Dec 8, 2007
    Location:
    bump on a log in a hole in the bottom of the sea
    #2
    background eraser tool. works like magic ;)

    click and hold the eraser button until three more options appear and choose background eraser tool. it's easy to figure out how to use.
     
  3. ChrisA macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #3
    None of the automatic tools are perfect. You will have to go in under 100% or more zoom and adjust the selection if you need it perfect. But the fastest way in your case is to select the background then "invert the selection".
    The lasso tool will do a pretty good job of finding all the black, then invert.
     
  4. Apple Corps thread starter macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #4
    jmann4489 - I am obviously a PS beginner and am not finding it al that intuitive. In PS CS3 10.0.1 I have the background eraser and there are the following choices showing:

    Brush - select pixel size
    Sample once, Sample continuous, Sample background swatch
    Tolerance 1 - 100%
    Protect foreground color (check box)

    I've doodled around but no results yet - would you be so kind as to give me more detail about the steps I need to take (other than getting a book and studying!!)

    Edit - part of my problem is not understanding layers :-0
     
  5. Apple Corps thread starter macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #5
    It might be faster for me to provide the image :rolleyes:
     

    Attached Files:

  6. Phrasikleia macrumors 601

    Phrasikleia

    Joined:
    Feb 24, 2008
    Location:
    Over there------->
    #6
    Uh...masking jobs don't get much easier than a perfect circle. Just use the Elliptical Marquee Tool to select the globe. If you don't get the selection right on the first try, just go to Select-->Transform Selection to finesse it a bit.
     
  7. Apple Corps thread starter macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #8
    macjram - whoa - that was so fast and did the job - thank you so very much!

    PS is a powerful program and clearly will take more effort on my part to learn much more about using it. The user manual is just not getting it for me - I find myself gridlocked at many points.

    Thanks again - much appreciated :D :D
     
  8. Apple Corps thread starter macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #9
    BTW - I asked the Mods to resize the image for this thread :)
     
  9. FrankieTDouglas macrumors 65816

    Joined:
    Mar 10, 2005
    #10
  10. Apple Corps thread starter macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #11
    Frankie - you are correct - I tried to do it but had no luck - so I put it on the back burner and worked on the content. All of the sudden it dawned on me that I never got the image background free and ready to use.

    Experienced PS users know the drill so well - there are some things in PS that are pretty intuitive - not so with other things. Instructions from those experienced users are no doubt clear but for me - on this software - dead ends are everywhere. I really need to get some tutoring on using PS - it is one of the few software packages that I just don't grasp readily - especially anything requiring layers. It appears to be too complex for rapid learning via trial and error.
     
  11. PCMacUser macrumors 68000

    PCMacUser

    Joined:
    Jan 13, 2005
    #12
    I'll second that suggestion. Using the elliptical marquee tool allows all elliptical shapes, as well as a perfect circle (just hold down Shift to get the circle while you drag). While the mouse button is still held down you can also press Spacebar to move the selection around.
     
  12. Apple Corps thread starter macrumors 68030

    Joined:
    Apr 26, 2003
    Location:
    California
    #13
    In Keynote there is a function that may do the same job Keynote > format > mask with shape.

    Easy to use and got me over the hurdle for the moment. I will go into PS tonight and try the marquee tool - I have to get over this learning disability with PS :eek:
     
  13. PCMacUser macrumors 68000

    PCMacUser

    Joined:
    Jan 13, 2005
    #14
    Don't be afraid of it. :)

    I did an art course this year which included Photoshop training, including this exact kind of masking. Just wait until you see what you can do with channel masks, heh heh. Don't look so worried. ;)
     

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