Article View: sci.image.processing
Article #1014Re: Sorting RGB Palette in Intensity Order. Please Help !
From: Lionel Tun
Date: Tue, 12 Jan 1993 14:57
Date: Tue, 12 Jan 1993 14:57
19 lines
1217 bytes
1217 bytes
pigeons@JSP.UMontreal.CA (Pigeon Steven) writes: >NOT! >Intensity=(r+g+b)/3. > >The actual Intensity value is: > > > Intensity:=(r*0.299)+(g*0.587)+(b*0.114) Why is this the case? Is it related to the sensitivity of the eye for the different primary cones, or is it to do with physics? Does it mean that green is the 'dimmest' colour and blue is the 'brightest'? Does it also mean the RGB model is not ideal? -- ________ Lionel Tun, lionel@cs.city.ac.uk ________ / /_ __/\ Computer Vision Group /\ \__ _\ /___/_/_/\/ City University, London EC1V 0HB \ \___\_\_\ \___\_\_\/ 071-477 8000 ext 3889 \/___/_/_/
Technical Details
Message-ID:
<1993Jan12.145735.15271@city.cs>Path:
arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!howland.reston.ans.net!spool.mu.edu!agate!doc.ic.ac.uk!citycs!lionelReferences:
<1ie20sINNe78@charnel.ecst.csuchico.edu> <1993Jan9.134848.7175@mcclb0.med.nyu.edu> <1993Jan10.034607.26313@cc.umontreal.ca>Show Full Headers
Complete Article Headers
Newsgroups: sci.image.processing Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!howland.reston.ans.net!spool.mu.edu!agate!doc.ic.ac.uk!citycs!lionel From: lionel@cs.city.ac.uk (Lionel Tun) Subject: Re: Sorting RGB Palette in Intensity Order. Please Help ! Message-ID: <1993Jan12.145735.15271@city.cs> Sender: news@city.cs (News) Organization: City University, London References: <1ie20sINNe78@charnel.ecst.csuchico.edu> <1993Jan9.134848.7175@mcclb0.med.nyu.edu> <1993Jan10.034607.26313@cc.umontreal.ca> Date: Tue, 12 Jan 93 14:57:35 GMT Lines: 19