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From: dan@rna.UUCP (Dan Ts'o)
Newsgroups: comp.graphics,sci.electronics
Subject: Signal/noise and sampling...
Message-ID: <1022@rna.UUCP>
Date: 24 May 90 06:36:46 GMT
Organization: Rockefeller University - Neurobiology
Lines: 28


	Although the actual application involves a video camera and video
digitizer (frame grabber), I don't think it matters for the question...

	CAMERA --> DIGITIZER

	I wish to test several cameras for their respective signal/noise
characteristics (S/N). The only DIGITIZER I have at the moment is spec'd
at 8-bits (and only provides 8-bits output). I wish to infer the S/N of
the CAMERA, which may or may not be better than 48db (8-bits). What is a
good procedure ?

	For example:

CAMERA1 may have an S/N of 48db.

CAMERA2 may have an S/N of 60db.

	What test can I devise to measure the CAMERA's S/N, given an
8-bit digitizer ?

				Cheers,
				Dan Ts'o		212-570-7671
				Dept. Neurobiology	dan@rna.rockefeller.edu
				Rockefeller Univ.	...cmcl2!rna!dan
				1230 York Ave.		rna!dan@nyu.edu
				NY, NY 10021		tso@rockefeller.arpa
							tso@rockvax.bitnet