watermark-without change the appearance of the image

Discussion in 'Photoshop' started by Vizros Plug-ins, Jun 7, 2004.

  1. How can I add a watermark (name, signature, marker...) to an image
    without changing its appearance? Or at least the change should not be
    detectable to human eyes? I read too many toturials that show you how
    to put a hard tag on the image. Those kind of stuff is totally useless
    because it destorys the image at the same time.

    Tony G. Smith
    Vizros - Realistic 3D page curl plug-ins and more
    Demo at http://www.vizros.com/gallery.html
     
    Vizros Plug-ins, Jun 7, 2004
    #1
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    Brooklyn NYC Guest

    Just curious> If you add an undetectable watermark won't that defeat the
    purpose of actually adding one? If you can't see the watermark how do you
    know it's there?
     
    Brooklyn NYC, Jun 7, 2004
    #2
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    jjs Guest

    You can see it fyou dump the file in a hex-editor. Sometimes a simple text
    editor will do. The purpose is rather after the fact to help demonstrate
    origin. I posted some time ago the two ways Photoshop creates and retains
    such information, and the one in which it does not. I cannot speak for CS.
     
    jjs, Jun 7, 2004
    #3
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    tysonfam2004 Guest

    tysonfam2004, Jun 7, 2004
    #4
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    Brooklyn NYC Guest

    Gotcha. Thanks for the info.
     
    Brooklyn NYC, Jun 7, 2004
    #5
  6. Vizros Plug-ins

    Fred Hiltz Guest

    See Help > Index > Watermark Information
     
    Fred Hiltz, Jun 7, 2004
    #6
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    JP White Guest

    Using Digimarc watermarking is one application of an invisible watermark
    that is traceable. Digimarc say the following about their watermark
    technology.
    See http://www.digimarc.com/solutions/digitalimagery/default.asp

    Not only can you determine who was the original author, the technology
    will alert the copyright holder when his/her image appears on the
    internet. Of course this service costs money.

    JP
     
    JP White, Jun 7, 2004
    #7

  8. It sounds like you are talking about hiding your watermark within the
    data, as in steganography. I found several good articles, such as
    http://www.guillermito2.net/stegano/ideas.html

    It doesn't sound too practical to me, however, because if an image can
    be viewed without a visible watermark, it can easily be copied.
     
    Frederic Banaszak, Jun 7, 2004
    #8
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    Sean Guest

    Take the word "steganography" and go from there.

    enjoy,

    Sean


    "In the End, we will remember not the words of our enemies,
    but the silence of our friends."

    - Martin Luther King Jr. (1929-1968)

    Photo Archive @ http://www.tearnet.com/Sean
     
    Sean, Jun 7, 2004
    #9
  10. If someone heavily edits or (especially) highly recompresses your image in
    Jpeg, any watermark will be destroyed.

    Cheers,
    Nicholas Sherlock
     
    Nicholas Sherlock, Jun 7, 2004
    #10
  11. Vizros Plug-ins

    Guest Guest

    After having read the thread maybe what people need is copyright protection.

    There is a product called c-Site that is less than 10$ and appears to be
    legit to me that submits all the forms and walks you through setup. and then
    gives you a graphic that shows that you are copy righted.
    http://tinyurl.com/2v78r

    tom

    PS. Tony sorry I accidentally replied to your home email.
     
    Guest, Jun 8, 2004
    #11
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