Is Digimarc an effective way to minimize image theft? Why not just add a layer of text with a copyright message to the image? Does Digimarc do anything more than this would? Thanks a lot. John
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Digimarc HIDES the copyright information inside the image. It alters the pixle data. The aim is to produce no visigle noticible modificaton of the image, but it is modified.
Then the copyright info etc, can be read from marked images via Plugins and other tools.
A digimarc image does not contain a visible copyright text.
Seeming as the copyright info is invisible, I would say that it is not a WAY at all to PREVENT theft, rather more of a way to detect if an image is originally yours…
The hidden data can survive some Image file format transfers, JPEG compression, And modification to the image. (Although it has its extents, and will break if there is too much modification)
There are tools/digimarc website that regularly crawls the web and can find images that are originaly YOURS.
People can ONLY see it when they open an image in the Digimarc plugin reading software. The software will tell them who it is marked to.
Elso no VISIBLE image marking.
Its more DETECT theft than PREVENT theft, because very few people check each image for a mark.
If you want to prevent. THen you must DETER and SHOW something. I.e. maybe a copyright notice. But instead of a normal text notice. Add a notice that is more discreet, i.e where the TEXT is not one colour but LIGHTENTS the image underneath.
No does not become corrupted on resizing. To some extent the Mark Data is preserved, but at severer resizing can be invalid as if the file is not marked at all.
Its is subscription. By the image ?, erm with going to digimarc.com and checking erm I would say pay for a Duration or an amount of images or something.
Re: What is the point of hiding the copyright info? What good will it do if noone can see it?
You don’t need to put a copyright on your images. They are copyright automatically, as soon as you publish them. If a person steals them, the fact that he "didn’t know they were copyright" is no defense. Almost everything on the Internet is copyright. You should assume so, unless there is a message on the page saying that something is "not" copyright, or that it "is" public domain.
Don, Thank you. I know that this it true. However, I also know that there are people who don’t respect the copyright laws and that it’s hard to police AND I don’t want to spend my time policing it. I’d rather do everything I can up front to prevent it.
Actually Explorer 6 has a mouse-over toolbar for images that allows you to save/send/print with a left-click and totally by-passes the right-click. No one has found a way around this yet as far as I know.
Yes there is a way round it the Microsoft implemented and documented. There is an additional attribute of the IMG tag that you set/use to not have this behavior on the mouse over on the image.