GD Watermark Question-
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From: "Gary" on 17 Sep 2010 18:21 ""Gary"" <gpaul(a)paulgdesigns.com> wrote in message news:1F.27.30333.1D5E39C4(a)pb1.pair.com... > Is there a way to insert a watermark on an image as it is being uploaded > to the image file, then removed when it is called from a database to be > viewed on a website? > > The rational behind this is I have a photographers site I am doing, and I > am limiting the size of the images somewhat to reduce pilferage and I > would like to be able to show the images a little larger, hence with a bit > more clarity and detail. > > Thanks for your input. > > Gary More info. I was asked off board where the watermark would show, so I am sorry if I was less than clear. The watermark would show on an image that is being downloaded from the server. If this were to work, I could let viewers see an image with a size of 640px in width to show clarity, (they are only able to see an image now with a width of 250 px now) should they decide to help themselves to it, it would download with a watermark on it, but the watermark would not appear on the web page itself. Gary __________ Information from ESET Smart Security, version of virus signature database 5458 (20100917) __________ The message was checked by ESET Smart Security. http://www.eset.com
From: TR Shaw on 17 Sep 2010 18:41 Gary you do realize that if you display the image in a browser without the watermark, simple drag and drop can copy the image as is (eg without the watermark) Tom On Sep 17, 2010, at 6:21 PM, Gary wrote: > > ""Gary"" <gpaul(a)paulgdesigns.com> wrote in message > news:1F.27.30333.1D5E39C4(a)pb1.pair.com... >> Is there a way to insert a watermark on an image as it is being uploaded >> to the image file, then removed when it is called from a database to be >> viewed on a website? >> >> The rational behind this is I have a photographers site I am doing, and I >> am limiting the size of the images somewhat to reduce pilferage and I >> would like to be able to show the images a little larger, hence with a bit >> more clarity and detail. >> >> Thanks for your input. >> >> Gary > > More info. > > I was asked off board where the watermark would show, so I am sorry if I was > less than clear. The watermark would show on an image that is being > downloaded from the server. If this were to work, I could let viewers see > an image with a size of 640px in width to show clarity, (they are only able > to see an image now with a width of 250 px now) should they decide to help > themselves to it, it would download with a watermark on it, but the > watermark would not appear on the web page itself. > > Gary > > > > __________ Information from ESET Smart Security, version of virus signature database 5458 (20100917) __________ > > The message was checked by ESET Smart Security. > > http://www.eset.com > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php >
From: Ashley Sheridan on 17 Sep 2010 18:49 On Fri, 2010-09-17 at 18:41 -0400, TR Shaw wrote: > Gary > > you do realize that if you display the image in a browser without the watermark, simple drag and drop can copy the image as is (eg without the watermark) > > Tom > > On Sep 17, 2010, at 6:21 PM, Gary wrote: > > > > > ""Gary"" <gpaul(a)paulgdesigns.com> wrote in message > > news:1F.27.30333.1D5E39C4(a)pb1.pair.com... > >> Is there a way to insert a watermark on an image as it is being uploaded > >> to the image file, then removed when it is called from a database to be > >> viewed on a website? > >> > >> The rational behind this is I have a photographers site I am doing, and I > >> am limiting the size of the images somewhat to reduce pilferage and I > >> would like to be able to show the images a little larger, hence with a bit > >> more clarity and detail. > >> > >> Thanks for your input. > >> > >> Gary > > > > More info. > > > > I was asked off board where the watermark would show, so I am sorry if I was > > less than clear. The watermark would show on an image that is being > > downloaded from the server. If this were to work, I could let viewers see > > an image with a size of 640px in width to show clarity, (they are only able > > to see an image now with a width of 250 px now) should they decide to help > > themselves to it, it would download with a watermark on it, but the > > watermark would not appear on the web page itself. > > > > Gary > > > > > > > > __________ Information from ESET Smart Security, version of virus signature database 5458 (20100917) __________ > > > > The message was checked by ESET Smart Security. > > > > http://www.eset.com > > > > > > > > > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > There's no way to do this. Anything you see in your browser has already been downloaded in some form onto your computer, and once that happens it's out of your control. PHP has no way to detect if the image is being requested by the browser to view or download, so can't do what you want. Besides which, if an image is displayed in the browser, there are dozens of ways to get at it, from right clicking and saving it, using the media tab of the file info dialogue (firefox), using firebug to view it, saving it from the cache, saving the whole page, using wget to spider and save that page, etc. The only way to do what you want is to have your own custom browser app (possibly written in Java) but even then someone could simply do a print screen. At the end of the day, if you want to prevent people downloading your images, then just don't show them the image. Thanks, Ash http://www.ashleysheridan.co.uk
From: TR Shaw on 17 Sep 2010 18:56 On Sep 17, 2010, at 6:49 PM, Ashley Sheridan wrote: > On Fri, 2010-09-17 at 18:41 -0400, TR Shaw wrote: > >> Gary >> >> you do realize that if you display the image in a browser without the watermark, simple drag and drop can copy the image as is (eg without the watermark) >> >> Tom >> >> On Sep 17, 2010, at 6:21 PM, Gary wrote: >> >>> >>> ""Gary"" <gpaul(a)paulgdesigns.com> wrote in message >>> news:1F.27.30333.1D5E39C4(a)pb1.pair.com... >>>> Is there a way to insert a watermark on an image as it is being uploaded >>>> to the image file, then removed when it is called from a database to be >>>> viewed on a website? >>>> >>>> The rational behind this is I have a photographers site I am doing, and I >>>> am limiting the size of the images somewhat to reduce pilferage and I >>>> would like to be able to show the images a little larger, hence with a bit >>>> more clarity and detail. >>>> >>>> Thanks for your input. >>>> >>>> Gary >>> >>> More info. >>> >>> I was asked off board where the watermark would show, so I am sorry if I was >>> less than clear. The watermark would show on an image that is being >>> downloaded from the server. If this were to work, I could let viewers see >>> an image with a size of 640px in width to show clarity, (they are only able >>> to see an image now with a width of 250 px now) should they decide to help >>> themselves to it, it would download with a watermark on it, but the >>> watermark would not appear on the web page itself. >>> >>> Gary >>> >>> >>> >>> __________ Information from ESET Smart Security, version of virus signature database 5458 (20100917) __________ >>> >>> The message was checked by ESET Smart Security. >>> >>> http://www.eset.com >>> >>> >>> >>> >>> >>> -- >>> PHP General Mailing List (http://www.php.net/) >>> To unsubscribe, visit: http://www.php.net/unsub.php >>> >> >> > > > There's no way to do this. Anything you see in your browser has already > been downloaded in some form onto your computer, and once that happens > it's out of your control. PHP has no way to detect if the image is being > requested by the browser to view or download, so can't do what you want. > > Besides which, if an image is displayed in the browser, there are dozens > of ways to get at it, from right clicking and saving it, using the media > tab of the file info dialogue (firefox), using firebug to view it, > saving it from the cache, saving the whole page, using wget to spider > and save that page, etc. > > The only way to do what you want is to have your own custom browser app > (possibly written in Java) but even then someone could simply do a print > screen. > > At the end of the day, if you want to prevent people downloading your > images, then just don't show them the image. Actually you can. Serve up an image from the DB and add watermark or whatever on the fly for web browsers. If a user downloads (assuming that s/he bought the image or the image is a "freebie" ) the image comes from the DB directly to the user using download headers. Tom
From: Ashley Sheridan on 17 Sep 2010 18:58 On Fri, 2010-09-17 at 18:56 -0400, TR Shaw wrote: > On Sep 17, 2010, at 6:49 PM, Ashley Sheridan wrote: > > > On Fri, 2010-09-17 at 18:41 -0400, TR Shaw wrote: > > > >> Gary > >> > >> you do realize that if you display the image in a browser without the watermark, simple drag and drop can copy the image as is (eg without the watermark) > >> > >> Tom > >> > >> On Sep 17, 2010, at 6:21 PM, Gary wrote: > >> > >>> > >>> ""Gary"" <gpaul(a)paulgdesigns.com> wrote in message > >>> news:1F.27.30333.1D5E39C4(a)pb1.pair.com... > >>>> Is there a way to insert a watermark on an image as it is being uploaded > >>>> to the image file, then removed when it is called from a database to be > >>>> viewed on a website? > >>>> > >>>> The rational behind this is I have a photographers site I am doing, and I > >>>> am limiting the size of the images somewhat to reduce pilferage and I > >>>> would like to be able to show the images a little larger, hence with a bit > >>>> more clarity and detail. > >>>> > >>>> Thanks for your input. > >>>> > >>>> Gary > >>> > >>> More info. > >>> > >>> I was asked off board where the watermark would show, so I am sorry if I was > >>> less than clear. The watermark would show on an image that is being > >>> downloaded from the server. If this were to work, I could let viewers see > >>> an image with a size of 640px in width to show clarity, (they are only able > >>> to see an image now with a width of 250 px now) should they decide to help > >>> themselves to it, it would download with a watermark on it, but the > >>> watermark would not appear on the web page itself. > >>> > >>> Gary > >>> > >>> > >>> > >>> __________ Information from ESET Smart Security, version of virus signature database 5458 (20100917) __________ > >>> > >>> The message was checked by ESET Smart Security. > >>> > >>> http://www.eset.com > >>> > >>> > >>> > >>> > >>> > >>> -- > >>> PHP General Mailing List (http://www.php.net/) > >>> To unsubscribe, visit: http://www.php.net/unsub.php > >>> > >> > >> > > > > > > There's no way to do this. Anything you see in your browser has already > > been downloaded in some form onto your computer, and once that happens > > it's out of your control. PHP has no way to detect if the image is being > > requested by the browser to view or download, so can't do what you want. > > > > Besides which, if an image is displayed in the browser, there are dozens > > of ways to get at it, from right clicking and saving it, using the media > > tab of the file info dialogue (firefox), using firebug to view it, > > saving it from the cache, saving the whole page, using wget to spider > > and save that page, etc. > > > > The only way to do what you want is to have your own custom browser app > > (possibly written in Java) but even then someone could simply do a print > > screen. > > > > At the end of the day, if you want to prevent people downloading your > > images, then just don't show them the image. > > Actually you can. Serve up an image from the DB and add watermark or whatever on the fly for web browsers. If a user downloads (assuming that s/he bought the image or the image is a "freebie" ) the image comes from the DB directly to the user using download headers. > > Tom > But the downloading will still be happening through the web browser, which PHP won't be able to recognise. Thanks, Ash http://www.ashleysheridan.co.uk
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