🚀 go-pugleaf

Duncan wrote:
> I was thinking of providing information, in my small business, on CD but
am
> worried if the photos and other files are copied.
>
> Is there anyway I can make my CD's such they are impossible to copy in
total
> or even the odd files.
>
> Any help much appreciated.
>
> Duncan

Photos can be invisibly watermarked using a system such as DigiMarc
(www.digimarc.com). They used to offer a free service for those wishing to
protect less than 100 images per annum, but this has since been withdrawn -
it's still quite competitively priced, depending on the number of images you
wish to protect.

PDFs can be protected using Adobe's in-built protection tools (providing you
create them using Acrobat, of course). You can add a permanent signature
which cannot be removed or altered and the documents are instantly
identifiable as yours.

Whilst this doesn't prevent people copying the CDs themselves, it does
provide a method whereby the individual files and images are protected. In
the case of Digimarc you will be given a unique number which is embedded
into the images which instantly identifies them as yours.

Whole-disc protection is very costly, I believe.


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Reply address is fake. Please send all praise, abuse, insults, bequests
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 Duncan wrote:

>I was thinking of providing information, in my small business, on CD but am
>worried if the photos and other files are copied.
>
>Is there anyway I can make my CD's such they are impossible to copy in total
>or even the odd files.
>
>Any help much appreciated.
>
>Duncan
>
If you find out, you will be a wealthy man.


-- 
JR

Nope  :-(


"Duncan" <duncansmith99@hotmail.com> wrote in message
news:b51oac$q2b$1@news8.svr.pol.co.uk...
> I was thinking of providing information, in my small business, on CD but
am
> worried if the photos and other files are copied.
>
> Is there anyway I can make my CD's such they are impossible to copy in
total
> or even the odd files.
>
> Any help much appreciated.
>
> Duncan
>
>

16 Mar 2003 11:56 UTC, Amethyst typed:
> Photos can be invisibly watermarked using a system such as DigiMarc
> (www.digimarc.com). They used to offer a free service for those wishing to
> protect less than 100 images per annum, but this has since been withdrawn -
> it's still quite competitively priced, depending on the number of images you
> wish to protect.

On the digi watermark theme, there's a nice commandline Unix/Linux tool 
that allows text to be embedded in an image or sound file. I use it for 
recording data about individual photos, but many people add their own 
copyright notices etc.

 http://steghide.sourceforge.net

A pre-compiled Windoze binary is also available for download.

In message <b51oac$q2b$1@news8.svr.pol.co.uk>
   "Duncan" <duncansmith99@hotmail.com> wrote:

> I was thinking of providing information, in my small business, on CD
> but am worried if the photos and other files are copied.
> 
> Is there anyway I can make my CD's such they are impossible to copy in
> total or even the odd files.

As Amethyst has pointed out there are ways of protecting the individual
images, however, a determined user can still remove even the most subtle
watermarks, I've done it myself, the watermarks typically rely on 'hidden'
information, ie colours and tints that the human eye doesn't normally see,
this does rely on having a certain range of colours available, so,
converting the image into a low colour format with bilinear dithering and
then back again can result in a cleaned image that looks identical to the
original but which has lost its watermarks.

See http://www.sarpcuser.fsworld.co.uk/colours/ for an example of a 24bit
(16 million colours) image and the same image in just 8bit (256 colours).

It may take a while to download, the images used are PNG rather than JPG,
this allows for verification that the images are the colour depth that
they say they are. 2 images 503,432 bytes and 188,612 bytes


As to protecting the CD itself, there are ways of making it hard to copy,
but, I've found that the methods used to protect the disc often mean that
some people can't even use the disc. And there are programs that can
'bitcopy' the CD, so, short of burning a hologram into the CD it's not
really possible to make a CD that is uncopyable.



The best thing you can do is to put an obvious copyright marker on every
image, your company logo perhaps, across the centre of the image as a
translucent mask. 
eg http://www.sarpcuser.fsworld.co.uk/colours/sa09-w.jpg


-- 
To contact me please use email(at)sarpcuser(dot)fsworld(dot)co(dot)uk

"Duncan" <duncansmith99@hotmail.com> wrote in message
news:b51oac$q2b$1@news8.svr.pol.co.uk...
> I was thinking of providing information, in my small business, on CD but
am
> worried if the photos and other files are copied.
>
> Is there anyway I can make my CD's such they are impossible to copy in
total
> or even the odd files.
>
As far as pictures are concerned, if you are marketing the pictures, as well
as digital watermarking, you can also mark your name on the bottom of each
one using paintshop pro or similar. When you convert to jpg, the change is
locked.

"JR" <satan@thefieryfurnace.fsnet.co.uk> wrote in message
news:jop87v03thbt09vfmuhrneot7hmfkjml4q@4ax.com...
> Duncan wrote:
>
> >I was thinking of providing information, in my small business, on CD but
am
> >worried if the photos and other files are copied.
> >
> >Is there anyway I can make my CD's such they are impossible to copy in
total
> >or even the odd files.
> >
> >Any help much appreciated.
> >
> >Duncan
> >
> If you find out, you will be a wealthy man.
>
>
A very very wealthy man in fact.

"Duncan" <duncansmith99@hotmail.com> schreef in bericht
news:b51oac$q2b$1@news8.svr.pol.co.uk...
> I was thinking of providing information, in my small business, on CD but
am
> worried if the photos and other files are copied.
>
> Is there anyway I can make my CD's such they are impossible to copy in
total
> or even the odd files.
>
> Any help much appreciated.
>
> Duncan
>
>

I don't think it is possible to protect pictures. Even when the picture file
can't be copied, you could just pres PRINT-SCREEN while you're watching the
picture, and then paste it in Paint.

Erik

Many thanks for all your replies.
My main issue is with the number of original photos that would be on the CD.
I have decided the best way forward is for me to choose a low resolution so
they would not be reproducible to a very high quality.
Duncan


"Duncan" <duncansmith99@hotmail.com> wrote in message
news:b51oac$q2b$1@news8.svr.pol.co.uk...
> I was thinking of providing information, in my small business, on CD but
am
> worried if the photos and other files are copied.
>
> Is there anyway I can make my CD's such they are impossible to copy in
total
> or even the odd files.
>
> Any help much appreciated.
>
> Duncan
>
>