Re: Getting R, G and B numerical values pixel by pixel from color photos?
- To: mathgroup at smc.vnet.net
- Subject: [mg36052] Re: Getting R, G and B numerical values pixel by pixel from color photos?
- From: Selwyn Hollis <slhollis at earthlink.net>
- Date: Wed, 14 Aug 2002 05:35:20 -0400 (EDT)
- References: <ajajic$9tt$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In Mathematica, choose Color Selector... from the Input menu. That brings up the Mac Color Picker. Move your pointer anywhere on the screen and option-click. That will select the color. Now click Okay, and the RGBColor recipe will be pasted into the Mathematica front end. A similar thing works in GraphicConverter as well. Also, in OS X, instead of option-clicking, just press the option key. Hope that helps. ---- Selwyn Hollis AES wrote: > I want to extract numerical values for the separate R, G and B channel > intensities, on a pixel by pixel basis, for specific (limited) regions > in color photos (JPEG, TIFF, whatever), on a Mac, preferably while I'm > viewing the region I'm examining. > > Any readily available software to do this? Can PhotoShop Elements, > GraphicConverter, or Mathematica do it? > > Thanks for any assistance; email cc of reply appreciated. >