Return Styles: Pseud0ch, Terminal, Valhalla, NES, Geocities, Blue Moon. Entire thread

Data Compression

Name: Anonymous 2012-09-01 17:49

Hey there /prog/, if one has two differently compressed versions of something (say, a photo) both of which are lossy, is it possible to 'combine' them in an attempt to re-create the original? If so, what techniques for doing this are available?

Name: Anonymous 2012-09-01 17:52

yes
save you're image as .png

Name: Anonymous 2012-09-01 17:56

>>2
Sorry if I didn't make this clear, but the goal is to re-create the original image/data which is presumed lost/missing/inaccessible/absent.

Name: Anonymous 2012-09-01 18:00

Or at least end up with something less lossy than the two files you start with.

Name: Anonymous 2012-09-01 19:07

>>4

If you have two signals that are both replicates of an original signal with some bounded error added, you can create a new signal with tighter or equal error bounds by averaging the two signals.

Name: Anonymous 2012-09-01 19:46

whoa, what if you compress a JPEG, do a delta against the original, then try to compress that and see the increase in quality.

Name: Anonymous 2012-09-01 21:22

Try this: http://en.wikipedia.org/wiki/Signal_averaging#Algorithmic_Implementation

Name: Anonymous 2012-09-01 21:23

>>5

/thread

Name: Anonymous 2012-09-01 23:14

>>7
I managed to end up with a resultant image which was further from the original than either of the two images I started with.

Name: Anonymous 2012-09-02 0:35

http://en.wikipedia.org/wiki/FrozenVoid#Infinite_Compression_Algorithm

Name: bampu 2012-09-02 9:54

pantsu

Newer Posts

Data Compression

1 Name: Anonymous 2012-09-01 17:49

2 Name: Anonymous 2012-09-01 17:52

3 Name: Anonymous 2012-09-01 17:56

4 Name: Anonymous 2012-09-01 18:00

5 Name: Anonymous 2012-09-01 19:07

6 Name: Anonymous 2012-09-01 19:46

7 Name: Anonymous 2012-09-01 21:22

8 Name: Anonymous 2012-09-01 21:23

9 Name: Anonymous 2012-09-01 23:14

10 Name: Anonymous 2012-09-02 0:35

11 Name: bampu 2012-09-02 9:54