>Hi,
>
>I was browsing through the new JPEG code, and didn't immediately see a
>way to embed comments or other arbitrary data within a JPEG.  I believe 
>that the standard supports this; before I dig deeper, I hope someone 
>can give me a quick answer.

>From the JFIF spec:

----
APP0 marker used for application-specific information

Additional APP0 marker segments can be used to hold application-specific 
information 
which does not affect the decodability or displayability of the JFIF 
file.  Application-
specific APP0 marker segments must appear after the JFIF APP0 and any 
JFXX APP0 
segments.  Decoders should skip any unrecognized application-specific 
APP0 segments. 

Application-specific APP0 marker segments are identified by a zero 
terminated string 
which identifies the application (not "JFIF" or "JFXX").  This string 
should be an 
organization name or company trademark.  Generic strings such as dog, 
cat, tree, etc. 
should not be used. 
----

So somehow you need to generate another APP0 segment for your compressed 
morph.



     -- tim