How to get uploaded image path in wordpress by filename?

How to get uploaded image path in wordpress by filename?

Can we get uploaded image path in wordpress by filename? Actually I know
the way in PHP that will parse all files in the uploads folder, and
matches the each file. But that way will produce high load on server,
whenever I will run this script.
Is there any other possible way?
Thanks.
Note: I do not have any posts linked with it. I just have image file name.
By that only I need to find the full image uploaded path e.g.
http://www.abc.com/wp-content/uploads/2013/02/test.png