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From: mohammad on 18 May 2010 18:04
i have a code dct1_embed which i got it here itself, it watermarks an image but converts it to grey scale.

what i need is that the image should not be converted to grey scale , can anybody help me out with this topic..
From: Matt Fig on 18 May 2010 18:13
Have you tried asking the author of the file? That would be my first step.
From: Walter Roberson on 18 May 2010 18:14
mohammad wrote:
> i have a code dct1_embed which i got it here itself, it watermarks an
> image but converts it to grey scale.
>
> what i need is that the image should not be converted to grey scale ,
> can anybody help me out with this topic..

You could watermark the three planes separately, I suppose. As, though, that
would affect all three planes, it is possible that the total change in color
might be visible, especially if you are using a representation such as uint8.

You could distribute the changes due to watermarking amongst all three planes,
using any fixed distribution.

You could watermark just one of the image planes. You may wish to examine the
documentation for rgb2gray to figure out which of the planes that humans are
least sensitive to changes in.
From: mohammad on 19 May 2010 02:47
"Matt Fig" <spamanon(a)yahoo.com> wrote in message <hsv3df$9bm$1(a)fred.mathworks.com>...
> Have you tried asking the author of the file? That would be my first step.


i lost the track of the author and code file does not have his name...
From: mohammad on 19 May 2010 02:50
Walter Roberson <roberson(a)hushmail.com> wrote in message <hsv3h9$noa$1(a)canopus.cc.umanitoba.ca>...
> mohammad wrote:
> > i have a code dct1_embed which i got it here itself, it watermarks an
> > image but converts it to grey scale.
> >
> > what i need is that the image should not be converted to grey scale ,
> > can anybody help me out with this topic..
>
> You could watermark the three planes separately, I suppose. As, though, that
> would affect all three planes, it is possible that the total change in color
> might be visible, especially if you are using a representation such as uint8.
>
> You could distribute the changes due to watermarking amongst all three planes,
> using any fixed distribution.
>
> You could watermark just one of the image planes. You may wish to examine the
> documentation for rgb2gray to figure out which of the planes that humans are
> least sensitive to changes in.


can you make changes to existing code ,so that it works...
i can give you the code ,give me your email id....
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