[OSGeo-Discuss] 'lossless' JPEG2000

[Wilfred L. Guerin]

See also the FIF formats from the late 1990s, there was at least on
validated system using that fractal information format / f image f
that was released publicly before the terrorist american nsa jacked
the patents and disappeared the company. Files were even deleted by
"authority" from one of my backup servers that had a mirror.

there is a nurbs/bspline/wavelet method as well that is effective for
3d and Nd data, allows for infinite complexity within bounding regions
but may have also disappeared when liecia moved and hid everything
related.

not to mention the last hundred years of cyphered/compressed analogue
image/video techniques...

tagline http://bluenorway.org



On 2/23/08, Bruce.Bannerman at dpi.vic.gov.au
<Bruce.Bannerman at dpi.vic.gov.au> wrote:
> IMO:
>
> Thanks for the reply Traian,
>
>
> I don't mean to be dismissive of this report, but I was hoping for
> something more definitive to prove that 'lossless' JPEG compressions did
> indeed protect the integrity of the data..
>
> Perhaps its just my ignorance, but I was hoping for something along the
> lines of:
>
> - a study of a range of typical spatial 'imagery'.
>
> - evaluation of all spectral values for each pixel in each image before
> compression.
>
> - 'lossless' compression  of the images
>
> - restoration of the compressed images
>
> - comparison of all spectral values for each pixel in each restored image
> against the original pre-compressed values.
>
> - definitive statement with reference to the study results.
>
>
> Bruce
>
>
> >
> > JPEG2K supports lossless via a reversible wavelet transform with
> > integral coefficients (which make it reversible, and so lossless).
> > Here is a reference:
> >
> > http://www.ece.uvic.ca/~mdadams/publications/pacrim2001.pdf
> >
> >
> >
> > Traian
> >
>
>
>
>
>
>
> Notice:
> This email and any attachments may contain information that is personal,
> confidential, legally privileged and/or copyright.No part of it should be
> reproduced,
> adapted or communicated without the prior written consent of the copyright
> owner.
>
> It is the responsibility of the recipient to check for and remove viruses.
> If you have received this email in error, please notify the sender by return
> email, delete
> it from your system and destroy any copies. You are not authorised to use,
> communicate or rely on the information
> contained in this email.
>
> Please consider the environment before printing this email.
>