Newsgroups: sci.image.processing
From: paul@pcserv.demon.co.uk (Paul Carpenter)
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!news.mathworks.com!udel!gatech!howland.reston.ans.net!news.sprintlink.net!pipex!demon!pcserv.demon.co.uk!paul
Subject: Re: correcting for uneven lighting
References: <35v75l$ooi@ulowell.uml.edu> <39o4ck$6vn@newsbf01.news.aol.com>
Organization: PC Services
Reply-To: paul@pcserv.demon.co.uk
Followup-To: sci.image.processing
X-Newsreader: Demon Internet Simple News v1.29
Lines: 24
Date: Sat, 12 Nov 1994 01:16:20 +0000
Message-ID: <784602980snz@pcserv.demon.co.uk>
Sender: usenet@demon.co.uk

-steriti@cpe.uml.edu (Ron Steriti)writes:
->Does anyone know how to detect and correct for uneven
->lighting conditions such as those caused when imaging
->small, dark surfaces illuminated with a spot lamp? 

Q Is lighting in any manner under your control?

Q How is the uneven lighting showing up?
	- shadows and penumbra?
	- partial illumination?
	- gradiated change in level?
	- other way?

Q Is spot lamp AC or DC driven?

Q What type of exposure used, standard (50/60) field rate, shuttered, integrated
  averaged?

  Can you control this?

Q What type of camera, and image (mono/colour..) are you taking..

-- 
Paul - "Any people you should meet are the products of a deranged imagination"
