Ann, There are tons of websites devoted to this. Try googling for PROTECT IMAGE DOWNLOAD or JAVASCRIPT PREVENT IMAGE DOWNLOAD. Here are a few resources: http://www.lucidimages.net/copyright.html http://www.brownielocks.com/stopcopying.html (ugly, but works!) http://www.ravensrants.com/support/prevent.shtml
There are also several products that supposedly prevent theft, but I've never used them. The thing to realize is that all these techniques are just band-aids; there is really no sure way to prevent image theft. Here are the answers to your questions: 1) Just about any image software can create watermarks (though I can't imagine how you would limit this to print-outs). 2) See above--no method is full-proof 3) 72 dpi is the standard quality setting for web pics (or 300 dpi to make printouts). You can't get better resolution from a screen than 72 dpi. 4) Again, no solution is full-proof. If you use JavaScript, the user can just turn off JS in their browser. If you use a server-side method, I can still use cheap screen-capture software to steal your image. Good luck, Michael Yunkin UNLV Libraries |---------+---------------------------> | | Ann Sinfield | | | <[email protected]| | | > | | | | | | 03/08/2004 10:21| | | AM | | | Please respond | | | to mcn-l | | | | |---------+---------------------------> >------------------------------------------------------------------------------------------------------------------------------| | | | To: [email protected] | | cc: | | Subject: MCN-L: Protection of Web Images - Ideas? | >------------------------------------------------------------------------------------------------------------------------------| Greetings! We are in need of some advice regarding protection of a web image that needs to be posted to our website. There is an upcoming exhibition here that per contract, requires the web-posted image to be protected from reproduction and/or downloading. This solution needs to include: [1] Use of a watermark. (Preferrably only on a physical print-out of the image.) [2] Disabling of downloading the image to the local hard drive. [3] Best image quality using the least amount of on-screen resolution for accurate study. [4] Any suggested solution needs to be universal among all web browsers on all platforms. [A clean browser, without any special plug-ins that might need to be downloaded.] We have attempted a few things to resolve some of the things listed above, but are interested in what others have done to try to take care of a situation like this. This also need-not be something to apply to every single image on the site - just one particular image that we need to post. Thanks in advance, and we look forward to hearing from you, and soon! _____________________________________________________ Brian Cors 734.647.0529 [w] Systems Administrator 734.764.3731 [f] University of Michigan Museum of Art 525 South State Street Ann Arbor, MI 48109-1354, USA _____________________________________________________ http://www.umma.umich.edu --- You are currently subscribed to mcn_mcn-l as: [email protected] To unsubscribe send a blank email to [email protected] --- You are currently subscribed to mcn_mcn-l as: [email protected] To unsubscribe send a blank email to [email protected]
