Reports & Discoverer :: Print Image On Criteria?

I have a report based on one table with three columns , one column will be updated upon user intervention that if approves the status flag of that column will be 3 and if he amends it will be 1 , by default it will be null.I want to display digital signature or image if the status is approved.I want to store the image/digital signature in Database.Do i need to create a table with BLOB column and store.

create table ot_rq_head ( r_date date, r_no number , r_status number );

insert into ot_rq_head values(sysdate,1,null);