On 12/17/2012 08:34 AM, d b wrote:

Hi all,

I am new to the list. I have searched the lists for an answer to my question, but no joy. Hopefully one of you would be kind enough to help me. I have heard you can protect your photographs on the web by applying a transparent overlay to them. When someone then right clicks and saves the image, all they get is the transparent foreground and not the photo underneath.

I have tried to do this using GIMP. However, the web guidance I have seen says you also have to edit the HTML code to do this.
Is there a way of doing this from GIMP itself without involving HTML code?
Any simple, easy to follow steps for a new user would be greatly appreciated.

I don't think this is possible with a graphics tool because the images produced by it will be "composite" images, meaning all of the content is "merged" into a single image.

You can create a watermark for your images and you can sort of "embed" one that can't be seen by the naked eye but could be "extracted", as necessary, to prove you created the image.

The technique you mention above, which involves HTML, can be accomplished with some CSS styling. If you send me a direct e-mail message, I can help with that since that's outside the scope of GIMP. :)

Peace...

Tom

The reason what you are talking about works is because of CSS.

Consider this:

This shows how this is done. There is nothing about normal image files which will facilitate layering the way you intend. Even if it did, a save of such an image would likely save all of the layers included within a single file.

In the example code above, the background image of the cell is the actual image you want to show. The tag holds the link to the transparent image which would be saved when someone does a right-click.

This is not a perfect solution. In fact, there is no perfect solution that doesn't involve a combination of server-side and client-side programming. So to accomplish something like that, you would have to do a series of interesting things which I suspect is outside of the scope of what you hope to accomplish. However, the example above will suffice to make the basics of what you want to happen.

On Mon, 2012-12-17 at 16:34 +0000, d b wrote:

Hi all,

I am new to the list. I have searched the lists for an answer to my question, but no joy. Hopefully one of you would be kind enough to help me. I have heard you can protect your photographs on the web by applying a transparent overlay to them. When someone then right clicks and saves the image, all they get is the transparent foreground and not the photo underneath.

I have tried to do this using GIMP. However, the web guidance I have seen says you also have to edit the HTML code to do this.
Is there a way of doing this from GIMP itself without involving HTML code?

Any simple, easy to follow steps for a new user would be greatly appreciated.

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On Mon, Dec 17, 2012 at 10:34 AM, d b wrote:

I have heard you can protect your photographs on the web by applying a transparent overlay to them. When someone then right clicks and saves the image, all they get is the transparent foreground and not the photo underneath.

FYI, anyone with the knowledge can defeat this "protection" quite easily.

I'm not saying it won't help at all, but robots, browser extensions, and code monkeys will not be fooled by this approach ;)

Chris

On 12/17/2012 12:48 PM, Chris Mohler wrote:

On Mon, Dec 17, 2012 at 10:34 AM, d b wrote:

I have heard you can protect your photographs on the web by applying a transparent overlay to them. When someone then right clicks and saves the image, all they get is the transparent foreground and not the photo underneath.

FYI, anyone with the knowledge can defeat this "protection" quite easily.

I'm not saying it won't help at all, but robots, browser extensions, and code monkeys will not be fooled by this approach ;)

Yep, you write-eth the truth. :)

Peace...

Tom

On Mon, 2012-12-17 at 14:48 -0600, Chris Mohler wrote:

FYI, anyone with the knowledge can defeat this "protection" quite easily.

For example, by taking a screenshot...

Liam

Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
Ankh: irc.sorcery.net irc.gnome.org freenode/#xml

On 12/17/2012 04:01 PM, Tom Williams wrote:

I'm not saying it won't help at all, but robots, browser extensions, and code monkeys will not be fooled by this approach ;)

Yep, you write-eth the truth. :)

Spoiler alert: If you want to figure out how to defeat this silly nonsense for yourself, stop reading now. La tee dah dee dum de dumm... OK so: If the right-click functions are disabled, turn off javascript execution to bring them back. If the image you want is covered by a transparent image, go to view > style and select "no style." If all else fails, press your "print screen" key, or, to get the original image file intact, do control+s and save as "web page, complete."

/spoilers

Probably the most effective approach to preventing e-z downloading of an image displayed on a web page, is to slice it into a grid of images and reassemble them in an HTML table for display on a web page. This adds a substantial work factor to recovering the original. In the GIMP I find a tool at Filters > Web > Slice that automates this process, and even makes the HTML table code. I forget whether that's a stock part, or something I found in the plugin registry.

This image dicing method can be used to make one big image into a quick and dirty table based web page layout, or to to create a fake image map where different regions of one image are links to different addresses. This is much simpler than making a "real" image map that uses a coordinate system to make different parts of one uncut image into links to different addresses. All these techniques are WAY out of style for good reasons.

:o)

Steve Kinney

On Mon, Dec 17, 2012 at 4:53 PM, Steve Kinney wrote:

Probably the most effective approach to preventing e-z downloading of an image displayed on a web page, is to slice it into a grid of images

Still defeated by the humble "PrtScn" key ;)

Chris

On Mon, 2012-12-17 at 17:02 -0600, Chris Mohler wrote:

Still defeated by the humble "PrtScn" key ;)

There's actually a way round that too, although you still can't stop someone from getting out a camera and photographing the computer monitor :-)

However, the way to defeat print screen is complex and operating system and video driver-specific - it involves using video.

These days I'd suggest to people, (1) have your URL on the images
(2) occasionally do google image searches for your images -- go to google.com, click on Images, click on the camera icon in the search bar, upload one of your images (or give the URL), and google will report on other copies of that image on the Web, and on "similar images", e.g. if someone deleted the URL from the corner.

This is what I've taken to doing with http://www.fromoldbooks.org/ when I got fed up of people taking the images (even the ones still in copyright) and re-selling them on other sites.

Liam

Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
Ankh: irc.sorcery.net irc.gnome.org freenode/#xml

On Mon, Dec 17, 2012 at 5:20 PM, Liam R E Quin wrote:

(2) occasionally do google image searches for your images --

(2b) do the same on http://www.tineye.com/

Chris

PS: I'm pretty sure I could convince xorg to give me a frame, no matter what video shenanigans were in play - hence no Netflix on linux ;) I'm starting to wander off topic though...

On 12/17/2012 03:02 PM, Chris Mohler wrote:

On Mon, Dec 17, 2012 at 4:53 PM, Steve Kinney wrote:

Probably the most effective approach to preventing e-z downloading of an image displayed on a web page, is to slice it into a grid of images

Still defeated by the humble "PrtScn" key ;)

You know, I'm VERY disappointed in those of you mentioning the print screen key and NOT mentioning a graphics tool we all like which has a great screen capture function built-in.... :) lol

When I take these kinds of screen shots, I find GIMP's screen shot function great since I can grab a region instead of having to take a shot of the entire screen and crop it later. Ubuntu Linux has a screen shot utility, which also selection of a region so I alternate between using that and using GIMP for the screen shots. :)

Peace...

Tom

On Mon, Dec 17, 2012 at 5:49 PM, Tom Williams wrote:

Ubuntu Linux has a screen
shot utility, which also selection of a region so I alternate between using that and using GIMP for the screen shots. :)

I use "Shutter" 99% of the time, mainly for the arrows/circles/boxes, etc.

The other 1% is some wonky utility that makes an image from a full page in IE.

I can count on one hand the times I've captured from GIMP :/

Chris

I am probably unseasonably, but if you have some times, you can survey a small peace of software very easy to use which is "Greenshot" allowing to perform most of the types of screen capture , then you can even draw something above the capture and fill it with transparency with some other functionnalities.

http://getgreenshot.org/

Regards

Paul

-----Message d'origine----- From: Tom Williams
Sent: Tuesday, December 18, 2012 12:49 AM To: gimp-user-list@gnome.org
Subject: Re: [Gimp-user] Photo protection - transparent foreground

On 12/17/2012 03:02 PM, Chris Mohler wrote:

On Mon, Dec 17, 2012 at 4:53 PM, Steve Kinney wrote:

Probably the most effective approach to preventing e-z downloading of an image displayed on a web page, is to slice it into a grid of images

Still defeated by the humble "PrtScn" key ;)

You know, I'm VERY disappointed in those of you mentioning the print screen key and NOT mentioning a graphics tool we all like which has a great screen capture function built-in.... :) lol

When I take these kinds of screen shots, I find GIMP's screen shot function great since I can grab a region instead of having to take a shot of the entire screen and crop it later. Ubuntu Linux has a screen shot utility, which also selection of a region so I alternate between using that and using GIMP for the screen shots. :)

Peace...

Tom

On 12/17/2012 06:20 PM, Liam R E Quin wrote:

These days I'd suggest to people, (1) have your URL on the images\

That's probably the best idea. You can't really prevent the images from being copied and re-used, but most of the time putting your URL on them converts the situation to a "free advertising" scenario.

Making an image a little harder to copy usually makes it impossible to find in an image search, which is often not what you want. It also usually makes it harder to use the file names and alt text of your images as an element of search engine optimization, which might cost you some traffic you would rather have.

:o)

Steve Kinney

The only way is to add your name ond some text to avoid copying.. or make the resulution small that nobody bother to copy them.. :). Anyway - don't put out any photos on the internet ..that you are afraid of being copied... BTW Feel free to share mine :D

What you seek to do is something content publishers all over the globe have been seeking to do. The problem with the internet is that it has to trust the client endpoint. You can limit the trust as much as possible, but any data which is to be displayed must also be received and decoded by the client. Once it is on the client, all bets are off. There is simply no way to control data access once it has been sent to the client.

We call attempts at doing this "DRM" and while there have been a great many attempts at accomplishing this, all results are compromised and becomes a failed effort.

The notion of free distribution while controlling content over the internet is simply not possible.

On Tue, 2012-12-18 at 15:45 +0000, d b wrote:

Thank you to all who have responded with constructive ideas and comments.

The reason for my original question was that I want to advertise some scanned in behind-the-scenes colour slides that my dad took while he was filming the speed boat chase sequences from Live and Let Die in 1972. I obviously did not want these freely copied and circulated uncontrolled.

Based on all your feedback so far, it appears the answer to the original question is no, it is not possible. Even with using HTML code or using no-right-click techniques, these can be overcome by someone determined enough.

I have therefore decided to upload very low resolution versions of my hi res scans, and also include a watermark across them.
I will keep monitoring future replies and respond if required.
I'm now off to explore more GIMP features .........
Thanks again.

Date: Tue, 18 Dec 2012 05:23:01 +0100 From: forums@gimpusers.com
To: gimp-user-list@gnome.org
CC: team@gimpusers.com
Subject: [Gimp-user] Photo protection - transparent foreground

The only way is to add your name ond some text to avoid copying.. or

make the

resulution small that nobody bother to copy them.. :). Anyway -

don't put out

any photos on the internet ..that you are afraid of being copied... BTW Feel free to share mine :D

Attachments: *

http://www.gimpusers.com/system/attachments/7/original/gimpkatt1.jpg

--
solensdatter2 (via www.gimpusers.com/forums) _______________________________________________ gimp-user-list mailing list
gimp-user-list@gnome.org
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The notion of free distribution while controlling content over

the

internet is simply not possible.

I couldn't have put it in a
better way. That's it.
People often forget that a content has to be sent to the client, before
it can be displayed. Once it is sent, I can't help thinking its kinda unethical
trying to control or restrict it. I mean, by means of disabling right-clicks,
javascript malicious code running,
etc...
Uploading low res files or watermarking I think its ok. You are just controlling
how much info is being sent, its a server-side solution, so to speak.

On Tue, 18 Dec 2012 11:28:02 -0500, Daniel wrote:

What you seek to do is something content publishers all over

the globe

have been seeking to do. The problem with the internet is

that it has

to trust the client endpoint. You can limit the trust as

much as

possible, but any data which is to be displayed must also be

received

and decoded by the client. Once it is on the client, all bets

are off.

There is simply no way to control data access once it has

been sent to

the client.

We call attempts at doing this "DRM" and

while there have been a great

many attempts at accomplishing this, all

results are compromised and

becomes a failed effort.

The notion

of free distribution while controlling content over the

internet is

simply not possible.

On Tue, 2012-12-18 at 15:45 +0000, d b

wrote:

Thank you to all who have responded with constructive ideas

and comments. The reason for my original question was that I want to advertise some scanned in behind-the-scenes colour slides that my dad took while he was filming the speed boat chase sequences from Live and Let Die in 1972. I obviously did not want these freely copied and circulated uncontrolled. Based on all your feedback so far, it appears the answer to the original question is no, it is not possible. Even with using HTML code or using no-right-click techniques, these can be overcome by someone determined enough. I have therefore decided to upload very low resolution versions of my hi res scans, and also include a watermark across them. I will keep monitoring future replies and respond if required. I'm now off to explore more GIMP features ......... Thanks again.

Date: Tue, 18 Dec 2012 05:23:01 +0100 From:

forums@gimpusers.com [1] To: gimp-user-list@gnome.org [2] CC: team@gimpusers.com [3] Subject: [Gimp-user] Photo protection - transparent foreground The only way is to add your name ond some text to avoid copying.. or

make the

resulution small that nobody

bother to copy them.. :). Anyway -

don't put out any photos on the

internet ..that you are afraid of being copied... BTW Feel free to share mine :D Attachments: *

users.com/system/attachments/7/original/gimpkatt1.jpg

f 2px solid;

margin-left:5px; width:100%">-- solensdatter2 (via www.gimpusers.com/forums [6])
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/mailman/listinfo/gimp-user-list

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> gimp-user-list mailing
list
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>
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