Mercurial > pylearn
comparison noise.py @ 414:643dbccde1fc
Added noise functions
| author | Joseph Turian <turian@iro.umontreal.ca> |
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| date | Fri, 11 Jul 2008 15:29:37 -0400 |
| parents | |
| children |
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| 413:f63dfb0ac7dc | 414:643dbccde1fc |
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| 1 def binomial(input, rstate, p = 0.75): | |
| 2 """ | |
| 3 Op to corrupt an input with binomial noise. | |
| 4 Generate a noise vector of 1's and 0's (1 with probability p). | |
| 5 We multiply this by the input. | |
| 6 | |
| 7 @note: See U{ssh://projects@lgcm.iro.umontreal.ca/repos/denoising_aa} | |
| 8 to see how rstate is used. | |
| 9 """ | |
| 10 noise = rstate.gen_like(('binomial',{'p': p, 'n': 1}), input) | |
| 11 noise.name = 'noise' | |
| 12 return noise * input | |
| 13 |