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| Multilayer RBF compression http://forum.alglib.net/viewtopic.php?f=2&t=1058 |
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| Author: | godmodder [ Tue Nov 12, 2013 3:57 pm ] |
| Post subject: | Multilayer RBF compression |
Hello, when I use the ALGBLIB rbf-ml algorithm to approximate a 128x128 pixel image, I get more non-zero elements than there are pixels. I thought that the hierarchical model tried to fit the mimimum amount of required basis functions. Is it possible to use ALGLIB to perform this kind of image compression? PS: If I manually select a random subset of the pixels (say 10%) as initial centers, the reconstruction is far worse than with methods like Residual Subsampling. (http://www.sciencedirect.com/science/article/pii/S0898122107000454) Thanks, Jeroen |
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