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MathGroup Archive 2006

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Re: surface plot of an image

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70893] Re: surface plot of an image
  • From: dh <dh at metrohm.ch>
  • Date: Wed, 1 Nov 2006 03:55:00 -0500 (EST)
  • References: <ei4mb2$e2t$1@smc.vnet.net>

Hi Ale,
hidden in your picture, there is an array of grey values. You may locate 
it by using InputForm or FullForm. If you e.g. import a BMP file it has 
the form: Raster[{array}_,___]. You would extract this by:
arr = Cases[g, Raster[x_, ___] -> x][[1]];
Having extracted the array arr you may e.g. use ListContourPlot to look 
at it.
Daniel


alemarabi at gmail.com wrote:
> Hi,
> 
> I have a microscopy image in gray levels and would like to convert it
> to a surface plot, in order to visualize the differences in grey values
> accros the picture.
> Is there an easy (or already) existing way to do that?
> Thank you in advance,
> 
> Ale
> 


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