[ILUG] Re: please tell me
dave.neary at palamon.ie
Thu Sep 20 10:24:31 IST 2001
Silvan delaney wrote:
> hi ,
> i hope one of you can give me a clear answer to question:
> i want to do the following:
> create an image as elaborate as you wish, any kind realy, and then insert in
> miniature, read hidden, a little text message.
> you know the one that one can't see if one just looks at picture/ image.
> now i need this to work within the one programm or, alternatively, two
> programms that understand either one.
You need to
a) come up with an image format, and include the capability to store
extra-image data as messages (as comments, or by ignoring bits in a
regular fashion & putting them together later) or
b) Use an existing image format which already includes this capability.
There are many, for example pnm (uncompressed rgb 8-bit values with a
header), png, gif (header), jpeg (header) - for most of these a perusal
of the source code for the gimp in plugins/common may help.
David Neary, E-Mail dave.neary at palamon.ie
Palamon Technologies Ltd. Phone +353-1-634-5059
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