Hi Balaji,
Do you already have the Vision software installed? If you do, you can use the Vision Assistant to get started with Vision programming in LabVIEW. This can also be used to generate LabVIEW code, so once you set up your parameters, you can see the architecture of the code that Vision Assistant builds.
If you do not have Vision software installed, you can get a good overview of imaging fundamentals here:
http://www.ni.com/swf/presentation/us/imaq/
Regards,
Brandon M.
Applications Engineer
National Instruments