# Digital image Watermark help needed

**URL:** <https://boards.straightdope.com/t/digital-image-watermark-help-needed/240152>\
**Category:** Factual Questions\
**Created:** [April 15, 2004, 12:34pm UTC](https://boards.straightdope.com/t/digital-image-watermark-help-needed/240152 "2004-04-15T12:34:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Dog80](https://avatars.discourse-cdn.com/v4/letter/d/6bbea6/32.png) [@Dog80](https://boards.straightdope.com/u/Dog80)\
**Post date:** [April 15, 2004, 12:34pm UTC](https://boards.straightdope.com/t/digital-image-watermark-help-needed/240152/1 "2004-04-15T12:34:02Z")

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I have a coursework on digital image watermarks and I want to show: The image, the waterrmarked image and the watermark alone.

I am using the Digimarc plugin from Photoshop 7 as an example. How can I extract the watermark from the watermarked image in Photoshop, maybe in a different layer?

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**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\
**Post date:** [April 15, 2004, 12:55pm UTC](https://boards.straightdope.com/t/digital-image-watermark-help-needed/240152/2 "2004-04-15T12:55:15Z")

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[This](http://www.chromecow.com/howtos/diff/Difference.htm) looks like it might help.

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**Author:** ![Dog80](https://avatars.discourse-cdn.com/v4/letter/d/6bbea6/32.png) [@Dog80](https://boards.straightdope.com/u/Dog80)\
**Post date:** [April 16, 2004, 11:18am UTC](https://boards.straightdope.com/t/digital-image-watermark-help-needed/240152/3 "2004-04-16T11:18:54Z")

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> [@Mangetout](#):
>
> [This](http://www.chromecow.com/howtos/diff/Difference.htm) looks like it might help.

Thanks! Exactly what I was looking for 😉