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Data and noise variance

  1. Sep 25, 2008 #1
    Hello,
    I am working do determine an optimum threshold for wavelt transform image denoise. I have the following quesstion. considering a vector of a data d*:
    d*= d + noise
    where the noise is zero mean and with variance sigma ~(0,sigma) and the signal "d" has variance sigma_x.
    I have to infer the noise variance sigma and the signal variance sigma_x.
    How can I do it followin g the Bayesian Methodology of Inference.
    I have experience with Bayesian inference, but never have feced this problem.
    Thank you,
    Loures
     
  2. jcsd
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