Hi Tamil,
Here is a sample about export image to spreadsheet by using office automation, though the sample is in C++, the automation logic is the same.
http://www.codeproject.com/com/ComExcelImages.asp
But I need to point that Microsoft does not currently recommend, and does not support automation for ASP.NET, because Office may exhibit unstable behavior and/or deadlock when run in this environment.
http://support.microsoft.com/kb/257757
So it is only give you an idea for your request. If the project is only for test, you can have a try. Thanks.
Sincerely,
Benson Yu
Microsoft Online Community Support
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