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Thread: Halo when using Unsharp Mask

  1. #1

    Default Halo when using Unsharp Mask

    When I use the unsharp mask in photoshop, there is this halo-ing effect, especially where the mountains meet the sky. I find that quite disstracting. Anyone know of a better way to do sharpening in PS without having the halo effect? TIA.

  2. #2
    Senior Member yyD70S's Avatar
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    Default Re: Halo when using Unsharp Mask

    Just try a lower sharpening (&/or radius) value. Remember to view the pic at 100%.

  3. #3

    Default Re: Halo when using Unsharp Mask

    Thanks.
    Is there a way to get more sharpening.... but no halo effect?
    maybe through another 3rd party program?

  4. #4
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    Default Re: Halo when using Unsharp Mask

    Quote Originally Posted by micky
    Thanks.
    Is there a way to get more sharpening.... but no halo effect?
    maybe through another 3rd party program?
    best way will be to get the image sharp in camera.

  5. #5
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    Default Re: Halo when using Unsharp Mask

    The halos indicate you've over done it.

    If you need to increase the amt of sharpening, use an edge sharpening technique which allows you to push it further. The method's too long to describe here.... so long that I've scripted it into an action, but there are enough resources on the web which show you how.... many different ways but they do the same thing. Search for edge sharpening.

    You can also try lab sharpening, which allows you to go further than USM as well, but I tend not to use it as I prefer not to switch colour spaces.

    There are only a few 3rd party programs which do the job well, but I doubt you want them. nik multimedia has a good but expensive kit. If you want to use the el cheapo packages, might as well DIY in PS.

    On a different note, if you need to apply that much sharpening to salvage the pic, you might want to look into improving your technique, cos there's a limit to what sharpening can do for the shot.

  6. #6

    Default Re: Halo when using Unsharp Mask

    did u try smart sharpening?

  7. #7

    Default Re: Halo when using Unsharp Mask

    Thanks for all the help! I dun really like to do that much sharpening, but sometimes accidents do occur, and I do like that picture a lot.

  8. #8
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    Default Re: Halo when using Unsharp Mask

    Whats the main purpose of using unsharp mask??

  9. #9
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    Default Re: Halo when using Unsharp Mask

    Quote Originally Posted by micky
    Thanks for all the help! I dun really like to do that much sharpening, but sometimes accidents do occur, and I do like that picture a lot.
    If you're desperate you can post up yr shot so pple can advise the best course of action.

    If its one of those "personal" hide in yr wallet cannot show anybody shots, forget it.

    If you dunno how to post pics here, too bad. Its been mentioned many times already.
    Last edited by solarii; 9th July 2006 at 01:54 PM.

  10. #10

    Default Re: Halo when using Unsharp Mask

    Quote Originally Posted by Stanly
    Whats the main purpose of using unsharp mask??
    the name is a bit of a misnomer, but its used to sharpen pictures.

  11. #11

    Default Re: Halo when using Unsharp Mask

    Try Goggling for 'High pass' sharpening. Worth a try

  12. #12
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    Default Re: Halo when using Unsharp Mask

    Quote Originally Posted by jdredd
    the name is a bit of a misnomer, but its used to sharpen pictures.
    It is not a misnormer if you know the origins of it.

  13. #13

    Default Re: Halo when using Unsharp Mask

    actually I find that at 100%, when I start to see haloing, that means the image is sharp for print...and to stop increasing unsharp...for screen view of course that means already too much unsharp...

  14. #14

    Default Re: Halo when using Unsharp Mask

    1 pt to remember is that you can vary different degrees of sharpening using masking and more than one sharpened layers. So some areas less, some more..

  15. #15

    Default Re: Halo when using Unsharp Mask

    if your main purpose is for web posting only, watch out for the radius at least 1 or below, if for printing purposes you can go higher than 1.

    disclaimer> these are guidelines only, experiment a lot, if you have more time.

    and again view 100% if possible

    hth

    Quote Originally Posted by micky
    When I use the unsharp mask in photoshop, there is this halo-ing effect, especially where the mountains meet the sky. I find that quite disstracting. Anyone know of a better way to do sharpening in PS without having the halo effect? TIA.

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