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Thread: A thought on watermarks for photo's

  1. #1
    Senior Member Pablo's Avatar
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    Default A thought on watermarks for photo's

    Hi all,

    A thought bought on by a sleepless night.

    As all cameras have a unique serial number.

    If the camera was able to (if selected in menu) insert the serial number into each frame taken.

    This number ( only a few pixels high ) would say decrease the output of those pixels by say 5%

    The resulting photo’s taken would not show the serial number to the naked eye, but it would be there.

    I then thought, “if they all did that, then a leecher would know where to look for and adjust it”.

    So I then thought, “ make it so the owner can position the number anywhere in the frame by use of buttons and showing the position on their LCD”.

    Ok, well that might work.

    Then thought. What if you could scan your signature (or logo) to a jpg file and upload it to your camera.

    The camera would then imbed the signature into the photo’s taken at a brightness not visabel to the naked eye, but can be proven to be there ???

    Any thoughts on this being a worthy idea or simply just another cause of not getting to sleep.


    Hope it makes some sense to you.

    Cheers
    Time, is an effortless construction :)

  2. #2
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    Default Re: A thought on watermarks for photo's

    A digital signature or ID like what a pdf can contained?

  3. #3
    Member 9V-Orion Images's Avatar
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    Default Re: A thought on watermarks for photo's

    Quote Originally Posted by Pablo View Post
    Any thoughts on this being a worthy idea or simply just another cause of not getting to sleep. Hope it makes some sense to you.

    Cheers
    Digital watermarking and steganography technology.

    DIGIMARC.
    CS Aviation / Flickr
    Per aspera ad astra

  4. #4

    Default Re: A thought on watermarks for photo's

    Thought of this sometime back. Not entirely foolproof, but kinda fun to play with.

    Image of Potty1, which is distributed.


    Image of Potty2, which is kept by the photographer.


    If you download both images and open in ps, then cut and paste Potty2 as a layer on top of Potty1, then change blending mode of Potty2 to difference, you can see your hidden message.

  5. #5
    Member tainted's Avatar
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    Default Re: A thought on watermarks for photo's

    I tried it but nothing lei....
    Potty 2 dragged into the opened file potty 1.
    Potty 2 layer is on top and blending changed to difference.
    Only got a black image and no message.
    is that supposed to be the result?

  6. #6

    Default Re: A thought on watermarks for photo's

    The message in the potty is very faint. Add a levels layer and slide the gray indicator almost all the way to the left.

  7. #7
    Member 9V-Orion Images's Avatar
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    Default Re: A thought on watermarks for photo's

    Quote Originally Posted by ArchRival View Post
    The message in the potty is very faint. Add a levels layer and slide the gray indicator almost all the way to the left.
    "Image of a Big Potty".

    Nice play with steganography.
    CS Aviation / Flickr
    Per aspera ad astra

  8. #8
    Member 9V-Orion Images's Avatar
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    Default Re: A thought on watermarks for photo's

    Was the images post-processed with a script or did you wrote the algorithm for encoding and modifying the binaries data into the images personally?
    Last edited by 9V-Orion Images; 21st September 2009 at 12:31 AM.
    CS Aviation / Flickr
    Per aspera ad astra

  9. #9
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    Default Re: A thought on watermarks for photo's

    Wah. Very clever.

    Mind sharing?

  10. #10

    Default Re: A thought on watermarks for photo's

    the best way to prevent leeching is to just post small images, from which limited revenue can be made.

    i mean, that's all you can do, right?

  11. #11
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    Default Re: A thought on watermarks for photo's

    .... SKIX

  12. #12

    Default Re: A thought on watermarks for photo's

    Quote Originally Posted by 9V-Orion Images View Post
    Was the images post-processed with a script or did you wrote the algorithm for encoding and modifying the binaries data into the images personally?

    Don't think so complicated. Everything was done in image processing software. But if it pleases you, it is also easy to write a matlab script to generate such things.

  13. #13

    Default Re: A thought on watermarks for photo's


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