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MathGroup Archive 2007

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Re: entropy of an image

  • To: mathgroup at
  • Subject: [mg81236] Re: entropy of an image
  • From: vickyisai at
  • Date: Mon, 17 Sep 2007 03:32:58 -0400 (EDT)
  • References: <fciocb$79$>

On Sep 16, 2:09 am, vickyi... at wrote:
> hello
> I want to plot entropy and information content of an image in Mathematica.
> I know the formula of entropy(, but i m not able to make out how to
> plot it for an image. (because entropy = sum of all p lg p. But how do i take p ( that is distribution of intensity values. as i have ppm image ,it has 3 intensity >values , one each for R G and B.
> And what if i have two images , how can i plot ther joint entropy?
> I checked in mathematica help for entropy and it takes me to a web
> page of Mathematica  wavelet explorer.
> how to go about plotting entropy?
> thanks

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