Timeline for Non-orthogonal basis which offers better energy compaction in image compression
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Jan 30, 2012 at 4:18 | comment | added | Ang Zhi Ping | For a video sequence, say transmitting at 25 fps, the signal statistics will not change that drastically for maybe a few seconds. So the signal-dependent basis can be transmitted once out of every n frames. Or if the characteristics of the video is known beforehand, a basis can be formed by training with representative input. I would consider a basis to have higher energy compaction if for a given mean squared error it would consistently use less basis elements to encode an image as compared to other bases. | |
| Jan 30, 2012 at 3:16 | comment | added | Dilip Sarwate | @AngZhiPing Did you read the last sentence in bullet point 2? Perhaps you could explain in more detail what you mean by signal-dependent basis and how you manage to avoid transmitting your signal-dependent basis. And while you are at it, tell us how you are measuring energy compaction too. | |
| Jan 30, 2012 at 2:31 | comment | added | Ang Zhi Ping | On bullet point 2, that would mean I have to transmit the basis corresponding to the entire x(t), which defeats the purpose of compression! | |
| Jan 29, 2012 at 17:02 | history | edited | Dilip Sarwate | CC BY-SA 3.0 |
revised post, added material
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| Jan 28, 2012 at 22:33 | history | answered | Dilip Sarwate | CC BY-SA 3.0 |