Hi,
  I'm , shivani working on a project related to image processing in vb.net...i'm stuck up wid a problem ..m not able to retrive pixel value( or intensity value) for each pixel of an image ... as i need to develop linear contrast stretch ..using those values....secondly m not able to retrive .. the total no. of bands of an image .. like for normal jpeg images it is 3 bands .. ie red green blue .. but for satellite images it could go upto 10 bands .. or even 256 bands....If u could help me wid this ...i'll be really thankful.

Hi Shivani...

Sorry i am not able to answer your question fully at this time
even though i am sending you some links which may be use ful for you.

http://www.codeproject.com/cs/media/csharpgraphicfilters11.asp

also try to search in http://www.codeproject.com

Once again sorry shivani......for not providing you satisfactory answer.

Thanks & Regards
Sandeep