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Re: blurry ellipse

  • To: mathgroup at smc.vnet.net
  • Subject: [mg92198] Re: blurry ellipse
  • From: "Solomon, Joshua" <J.A.Solomon at city.ac.uk>
  • Date: Tue, 23 Sep 2008 07:29:19 -0400 (EDT)
  • References: <gat9g4$ec5$1@smc.vnet.net> <gavqku$emm$1@smc.vnet.net>

thanks. but notice, intensity also varies as you go around your ellipse.
j

 On 19/09/2008 10:16, in article gavqku$emm$1 at smc.vnet.net, "dh"
<dh at metrohm.ch> wrote:

> n=100;
> 
> pict=Table[0,{n},{n}];
> 
> Scan[(pict[[Round[n/2+n/5  Sin[#]],Round[n/2+2
> 
> n/5Cos[#]]]]=1)&,Range[0,2Pi,0.01]];
> 
> Graphics[Raster[pict]]
> 
> kernel={{1,1},{1,1}}; pict=ListConvolve[kernel,pict];pict=pict/Max[pict];
> 
> Graphics[Raster[pict]]
> 
> kernel={{1,1,1},{1,1,1},{1,1,1}};
> 
> pict=ListConvolve[kernel,pict];pict=pict/Max[pict];
> 
> Graphics[Raster[pict]]
> 
> kernel={{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}};
> 
> pict=ListConvolve[kernel,pict];pict=pict/Max[pict];
> 
> Graphics[Raster[pict]]



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