where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
Radiography contrast
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

513 views
01:02 May-18-2008

Gowri santhosh Palika

NDT Inspector,
Royscan engineering pte ltd,
Singapore,
Joined May 2008
51
Radiography contrast

Hi,
how can i define subject contrast and film contrast.
And what is Film gradient?


 
03:13 May-19-2008

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
806
Re: Radiography contrast Film gradient (G):
The slope of the characteristic curve of a film at a specified optical density D.

Object contrast (Subject Contrast):
The relative difference of radiation transmitted between two regions of an irradiated object.

Visual contrast (Film Contrast):
A density difference perceived visually between two adjacent areas when viewing a radiograph.

These definitions were found in the A-Z Section of this site http://www.ndt.net/ndtaz/ndtaz.php


----------- Start Original Message -----------
: Hi,
: how can i define subject contrast and film contrast.
: And what is Film gradient?
------------ End Original Message ------------




 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|