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Science Forum Index » Compression Forum » Does anybody know the JJ2000 Project?
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Message |
| Guest |
 Posted: Fri Sep 26, 2003 10:07 am |
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I have few questions regarding the JJ2000 implementation.
(http://jj2000.epfl.ch/)
I am trying to load JPEG2000 (J2k) image and make use of the scalability
features
provided by J2k by showing the image while loading. The tutorials clearly
show that
there are two possible "modes":
- Progressive by resolution (You load the picture and it becomes sharper
while loading,
something like interlaced GIF)
- Progressive by accuracy
I am interested in the first: "Progressive by resolution". The way it is
done now in the
jj2kgui-1.5b.jar is that it shows the picture after it is decoded using a
temporary pgm,
pgx or ppm file. So what the user sees the progress bar and then the image
appears.
1.How to inform the decoder that I would like to get my data progressively
by resolution?
2. What kind of data/stream is supplied by the decoder while progressive
loading?
3. Which java (AWT?) object has the capability to display the progressive
data received from decoder while decoding?
I would be grateful for any help.
Regards,
gicio |
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| Diego SANTA CRUZ |
| Posted: Fri Sep 26, 2003 10:33 am |
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Guest
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On Fri, 26 Sep 2003 18:07:57 +0200, gici wrote:
Quote: I have few questions regarding the JJ2000 implementation.
(http://jj2000.epfl.ch/)
I am trying to load JPEG2000 (J2k) image and make use of the scalability
features
provided by J2k by showing the image while loading. The tutorials clearly
show that
there are two possible "modes":
- Progressive by resolution (You load the picture and it becomes sharper
while loading,
something like interlaced GIF)
- Progressive by accuracy
I am interested in the first: "Progressive by resolution". The way it is
done now in the
jj2kgui-1.5b.jar is that it shows the picture after it is decoded using a
temporary pgm,
pgx or ppm file. So what the user sees the progress bar and then the image
appears.
1.How to inform the decoder that I would like to get my data progressively
by resolution?
This is not possible with the current JJ2000 implementation, but for progressive
by resolution it would be fairly easy to add I guess.
Quote: 2. What kind of data/stream is supplied by the decoder while progressive
loading?
3. Which java (AWT?) object has the capability to display the progressive
data received from decoder while decoding?
I think that the one used by the JJ2000 decoder is capable of that, although I'm
not 100% sure.
Quote:
I would be grateful for any help.
Regards,
gicio |
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