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Subject:
How to make online images copy proof
Category: Computers Asked by: crcrystal-ga List Price: $5.00 |
Posted:
19 Feb 2003 18:07 PST
Expires: 21 Mar 2003 18:07 PST Question ID: 163697 |
How do we make our website images, etc. so they cannot be copied? A simple click on the images allows anyone to "steal" them. We are spending a tremendous amount of time monitoring and pursuing the "theft" of our intellectual material. Thank you. | |
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There is no answer at this time. |
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Subject:
Re: How to make online images copy proof
From: pinkfreud-ga on 19 Feb 2003 18:17 PST |
I do not believe there is any way to totally prevent images from being stolen (anything that can be viewed can be copied,) but there are simple tricks for thwarting casual users from swiping your graphics. Here you will find some useful discussion on this subject, and some Javascript that may help you: http://www.experts-exchange.com/Web/Graphics/Web_Images/Q_20389329.html |
Subject:
Re: How to make online images copy proof
From: alan_dershowitz-ga on 20 Feb 2003 14:13 PST |
Your website is sending a copy of the file to every person who looks at it. There's nothing you can do about that. Thats like trying to stop someone from recording your TV show. Once you've sent it to them, your control is gone. Additionally, all those Javascript tricks to stop "casual thieves" from taking your pictures don't work at all on mozilla/netscape 6, or any browser with javascript shut off/no javascript. I've noticed the way some photo sites protect their images. 1. watermark them--disadvantage, it's ugly. 2. make them small size, or low resolution--disadvantage, its ugly. 3. take the photo and selectively crop it so that a person can see the quality of the image, but they don't get the whole thing--disadvantage, you cannot judge quality of composition. Lastly, as a hobby I collect pictures from websites (I don't repost them anywhere though), and if a site tries to keep me from stealing their pictures, it just makes me more determined to get them. On the other hand, out of my 2 giabytes of pictures I don't think I have a single picture that has a watermark on it, because I hate that. |
Subject:
Re: How to make online images copy proof
From: knowledge_seeker-ga on 20 Feb 2003 14:49 PST |
Someone else shares your dilemma -- Q: How to reserve my pic not to be copied http://answers.google.com/answers/main?cmd=threadview&id=71455 -K~ |
Subject:
Re: How to make online images copy proof
From: owain-ga on 21 Feb 2003 06:15 PST |
I haven't checked all the links given by other responders, but one way of frustrating image saving, that doesn't rely on Javascript, is to use CSS (cascading style sheets). Place the image on the page and then, using CSS, place a *transparent GIF* over the image. The underneath image will show through the transparent GIF in the browser, but when the user right-clicks to save the image they will save the top image ie the GIF and not the underlying image. However, anyone can still go into their browser cache and save the image from there. Owain Owain |
Subject:
Re: How to make online images copy proof
From: borchart-ga on 23 Feb 2003 11:32 PST |
You could insert your image into another object, like a shockwave file or a java applet. The file could not be so easily reused then, but of course anything that can be viewed on the screen can be copied to the clipboard (screenshot) and saved as a file. But maybe some digital rights protection software can also protect against that. |
Subject:
Re: How to make online images copy proof
From: kellyc-ga on 25 Feb 2003 03:25 PST |
There is no way (as mentioned above) except not to put the image on the web. I would suggest you put a soft watermark (visible) with your copyright information in the image, this may stop others from using your image, but then again it may not. You can also imbed an invisible watermark using Paintshop pro version 7. Then if you find the image on a competitor's or unauthorized site, you can check the image for your watermark, and then notify the offending website that they have stolen a copyrighted image and demand they take it down. At least with your invisible watermark, you may stand a better chance of legal action. The only problem with the invisible watermark is that a print screen will loose the watermark, so do not make it hard to copy the image. Saving the file to another format when not using Paintshop ver. 7 will/may also loose the watermark Best wishes. |
Subject:
Re: How to make online images copy proof
From: ldavinci-ga on 07 Mar 2003 15:45 PST |
You could probably use a SSL to encrypt the data and then use a custom application/applet to decrypt the image and display it as a animated picture with random interleaving from frame to frame and a psuedo random 15/30 frame sequence and use persistance of vision to let the image to be reconstructed by the human eyes/brain. You have to ensure that your application does not store the full image data as a single piece in memory. Again it is difficult to evade sophisticated frame grabbing of the screen, to prevent reconstructing the image.You could make it a bit more tedious by displaying a random single frame watermark that does not overlap between the frames. |
Subject:
Re: How to make online images copy proof
From: floatabletr-ga on 04 Apr 2003 16:04 PST |
I think its impossible. If you really wanted the image all you have to do is "print screen" open up a photo editor program(photoshop) paste and then crop out the rest of the junk in the picture. |
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