Explaining unsharp mask

Discussion in 'Photoshop' started by Doug Raflik, Jan 5, 2004.

  1. Doug Raflik

    Doug Raflik Guest

    Hello all. I am new to the group and pretty new to photoshop.

    Can someone point me to a link, or just explain the whys of unsharp
    mask. I know the basics of how to use it, but am wondering why I should
    use it as opposed to just sharpening the picture with another program,
    such as Irfan View, which is what I have been using for years.

    Here is a link to the same picture saved at the highest quality and at
    the same size.


    http://www.wxnut.net/unsharp.htm

    Image one is straight from the camera. (D60 if it matters)


    The second picture is using USM. (specs are above the picture)

    The third is using the sharpen option under filter in APS 7

    The last picture is sharpened in Irfan View.

    I seem to like the Irfan View the best, so I am wondering why I am
    seeing all this hub bub about USM? I think the IView one looks better
    AND it is a smaller file size which is better for not taking up so much
    server space. Am I just not using USM in the right way?

    Thanks in advance...
    Doug
     
    Doug Raflik, Jan 5, 2004
    #1
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  2. Doug Raflik

    Paul Furman Guest

    The advantage is being able to get different effects.
    Try zooming in as far as possible & see what happens. Here's a crop of
    your images and another setting attempting to match *not very well):
    http://www.edgehill.net/unsharp

    Doug Raflik wrote:
    > Hello all. I am new to the group and pretty new to photoshop.
    >
    > Can someone point me to a link, or just explain the whys of unsharp
    > mask. I know the basics of how to use it, but am wondering why I should
    > use it as opposed to just sharpening the picture with another program,
    > such as Irfan View, which is what I have been using for years.
    >
    > Here is a link to the same picture saved at the highest quality and at
    > the same size.
    >
    >
    > http://www.wxnut.net/unsharp.htm
    >
    > Image one is straight from the camera. (D60 if it matters)
    >
    >
    > The second picture is using USM. (specs are above the picture)
    >
    > The third is using the sharpen option under filter in APS 7
    >
    > The last picture is sharpened in Irfan View.
    >
    > I seem to like the Irfan View the best, so I am wondering why I am
    > seeing all this hub bub about USM? I think the IView one looks better
    > AND it is a smaller file size which is better for not taking up so much
    > server space. Am I just not using USM in the right way?
    >
    > Thanks in advance...
    > Doug
    >
     
    Paul Furman, Jan 5, 2004
    #2
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  3. Doug Raflik

    Paul Furman Guest

    Also look at the sky areas when you do too much, they become gritty. And
    see what different jpeg quality saves look like when you are zoomed in
    all the way!

    Paul Furman wrote:

    > The advantage is being able to get different effects.
    > Try zooming in as far as possible & see what happens. Here's a crop of
    > your images and another setting attempting to match *not very well):
    > http://www.edgehill.net/unsharp
    >
    > Doug Raflik wrote:
    >
    >> Hello all. I am new to the group and pretty new to photoshop.
    >>
    >> Can someone point me to a link, or just explain the whys of unsharp
    >> mask. I know the basics of how to use it, but am wondering why I
    >> should use it as opposed to just sharpening the picture with another
    >> program, such as Irfan View, which is what I have been using for years.
    >>
    >> Here is a link to the same picture saved at the highest quality and at
    >> the same size.
    >>
    >>
    >> http://www.wxnut.net/unsharp.htm
    >>
    >> Image one is straight from the camera. (D60 if it matters)
    >>
    >>
    >> The second picture is using USM. (specs are above the picture)
    >>
    >> The third is using the sharpen option under filter in APS 7
    >>
    >> The last picture is sharpened in Irfan View.
    >>
    >> I seem to like the Irfan View the best, so I am wondering why I am
    >> seeing all this hub bub about USM? I think the IView one looks better
    >> AND it is a smaller file size which is better for not taking up so
    >> much server space. Am I just not using USM in the right way?
    >>
    >> Thanks in advance...
    >> Doug
    >>

    >
     
    Paul Furman, Jan 5, 2004
    #3
  4. How the "Unsharp Mask" works, is explained at:

    http://www.nebulus.org/tutorials/2d/photoshop/ps8/index.html

    Good luck

    vdRee


    "Paul Furman" <> wrote in message
    news:...
    > The advantage is being able to get different effects.
    > Try zooming in as far as possible & see what happens. Here's a crop of
    > your images and another setting attempting to match *not very well):
    > http://www.edgehill.net/unsharp
    >
    > Doug Raflik wrote:
    > > Hello all. I am new to the group and pretty new to photoshop.
    > >
    > > Can someone point me to a link, or just explain the whys of unsharp
    > > mask. I know the basics of how to use it, but am wondering why I should
    > > use it as opposed to just sharpening the picture with another program,
    > > such as Irfan View, which is what I have been using for years.
    > >
    > > Here is a link to the same picture saved at the highest quality and at
    > > the same size.
    > >
    > >
    > > http://www.wxnut.net/unsharp.htm
    > >
    > > Image one is straight from the camera. (D60 if it matters)
    > >
    > >
    > > The second picture is using USM. (specs are above the picture)
    > >
    > > The third is using the sharpen option under filter in APS 7
    > >
    > > The last picture is sharpened in Irfan View.
    > >
    > > I seem to like the Irfan View the best, so I am wondering why I am
    > > seeing all this hub bub about USM? I think the IView one looks better
    > > AND it is a smaller file size which is better for not taking up so much
    > > server space. Am I just not using USM in the right way?
    > >
    > > Thanks in advance...
    > > Doug
    > >

    >
     
    A. van der Ree, Jan 5, 2004
    #4
  5. Doug Raflik

    Kris Zeklika Guest

    in article , Doug Raflik at
    wrote on 1/4/04 9:18 PM:

    > Hello all. I am new to the group and pretty new to photoshop.
    >
    > Can someone point me to a link, or just explain the whys of unsharp
    > mask. I know the basics of how to use it, but am wondering why I should
    > use it as opposed to just sharpening the picture with another program,
    > such as Irfan View...



    You should use some other program. Photoshop is not for you.
     
    Kris Zeklika, Jan 5, 2004
    #5
  6. Doug Raflik

    Hecate Guest

    On Sun, 04 Jan 2004 23:18:33 -0600, Doug Raflik
    <> wrote:

    >Hello all. I am new to the group and pretty new to photoshop.
    >
    >Can someone point me to a link, or just explain the whys of unsharp
    >mask. I know the basics of how to use it, but am wondering why I should
    >use it as opposed to just sharpening the picture with another program,
    >such as Irfan View, which is what I have been using for years.
    >
    >Here is a link to the same picture saved at the highest quality and at
    >the same size.
    >
    >
    >http://www.wxnut.net/unsharp.htm
    >
    >Image one is straight from the camera. (D60 if it matters)
    >
    >
    >The second picture is using USM. (specs are above the picture)
    >
    >The third is using the sharpen option under filter in APS 7
    >
    >The last picture is sharpened in Irfan View.
    >
    >I seem to like the Irfan View the best, so I am wondering why I am
    >seeing all this hub bub about USM? I think the IView one looks better
    >AND it is a smaller file size which is better for not taking up so much
    >server space. Am I just not using USM in the right way?
    >
    >Thanks in advance...
    >Doug


    DO NOT, under any circumstances use anything in the sharpen menu
    except USM. All the rest should have been removed from PS years ago.
    Unless you want to ruin an image of course, then the sharpen options
    will do it for you every time.

    --

    Hecate

    veni, vidi, reliqui
     
    Hecate, Jan 6, 2004
    #6
  7. In traditional printing of slides a B&W (negative) a mask was made by
    contact printing which, when made unsharp and very pale, actually served to
    sharpen the image and reduce the contrast so that - properly done - a
    Cibachrome print of a slightly soft, high contrast transparency could be
    made which resulted in a sharp print with full tonal range.

    Like many things from the past, Adobe chose to call their electronic version
    of a sharpening tool by the same name. That is where the similarity ends but
    it does pretty much find the edges of the image and reduce the 'smudge' or
    'bleed' of the edge into the background. It also puts a sort of halo tightly
    at the edge thereby creating the illusion of sharpening the image... Which
    is quite to opposite to it's name!

    Doug. (too)
    -------------------------------------
    "Doug Raflik" <> wrote in message
    news:...
    > Hello all. I am new to the group and pretty new to photoshop.
    >
    > Can someone point me to a link, or just explain the whys of unsharp
    > mask. I know the basics of how to use it, but am wondering why I should
    > use it as opposed to just sharpening the picture with another program,
    > such as Irfan View, which is what I have been using for years.
    >
    > Here is a link to the same picture saved at the highest quality and at
    > the same size.
    >
    >
    > http://www.wxnut.net/unsharp.htm
    >
    > Image one is straight from the camera. (D60 if it matters)
    >
    >
    > The second picture is using USM. (specs are above the picture)
    >
    > The third is using the sharpen option under filter in APS 7
    >
    > The last picture is sharpened in Irfan View.
    >
    > I seem to like the Irfan View the best, so I am wondering why I am
    > seeing all this hub bub about USM? I think the IView one looks better
    > AND it is a smaller file size which is better for not taking up so much
    > server space. Am I just not using USM in the right way?
    >
    > Thanks in advance...
    > Doug
    >
     
    Techno Aussie, Jan 6, 2004
    #7
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