Retrieving the Blob data type image from oracle database

Issue:"I have a employee table with employee_id,employee_name, employee_ image as fields.I stored the employee_image as blob in oracle database.I would like to know how to retrieve the blob image from database into flex data-grid.I found so many online articles over internet but nothing worked yet.

so,if u know any about this issue please let me know about the source code else send the source code to my EMAIL ID:-sri.sai268@gmail.com