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MathGroup Archive 2004

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Re: importing image and getting numbers from the gray intensity

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49356] Re: importing image and getting numbers from the gray intensity
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 16 Jul 2004 06:06:37 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <cd5okp$b2c$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

invert the image and let run a thining algorithm over 
the bitmap. Label the unconnected components and get
the positions for every label form the bitmap and you are done.

Regards
  Jens




sean kim wrote:
> 
> let's say you have an image of gray bands of varying intensity.
> 
> such as the one seen on the website,
> 
> http://encyclopedia.thefreedictionary.com/SDS-PAGE
> 
> Is there anyway to change the picture or do something and be able to
> get numerical values for those bands?
> 
> maybe define a vertical line and then go to the center of the each
> bands and measure how intense the gray is.
> 
> or maybe define a rectangle and get the gray intensity in that...
> 
> is there a packages or codes for doing that?  NIH image program which
> is freely avaialble can do this. But I wanted to do it in Mathematica.
> 
> Thanks for any and all insights.
> 
> sean


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