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importing image and getting numbers from the gray intensity

• To: mathgroup at smc.vnet.net
• Subject: [mg49338] importing image and getting numbers from the gray intensity
• From: sean_incali at yahoo.com (sean kim)
• Date: Thu, 15 Jul 2004 07:00:00 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

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

• Follow-Ups:
  • Re: importing image and getting numbers from the gray intensity
    • From: Yasvir Tesiram <yat@omrf.ouhsc.edu>