Deblocking filter for JPEG/digital video

In comp.compression John Costella <jpcostella@hotmail.com> wrote:
> The second link is no good, and the third and fourth are identical to
> the first one.

Sorry, I was rushed when posting.  Just go here and click 4 times.
They're "before*.bmp" using your original basenames.

 http://www.cacreeks.com/unblock/

What are the names of your equivalents?

Thanks Bill. The first four examples on the sample page correspond to
these four cases.

The results in PSP look pretty good in terms of luminance, but the
chrominance is a bit bizarre, with weird sharp edges (not blocky,
admittedly, but just as visually distracting).

I am not sure what it is doing to the image, because some details seem
to be a bit washed out. There's definitely some processing going on
that isn't just removing the blocking; it's probably removing the
higher frequency DCT components as well.

Thanks again
John

John Costella wrote:
> As I said, I'm looking at very fast implementations,
> so that explains why we were a bit at cross purposes.

Right. Note, however, that "fast implementation" is a function of
hardware, too. I have been involved with video processing systems with
153,600 single-bit SIMD processors ("a processor per pixel") where some
algorithms that are computationally intensive in serial are a snap in
parallel, even in real-time.

Cheers! --M