How to edit an image stored as a BLOB

Using Spring MVC , thymeleaf and mysql , I have an image stored in a database as a BLOB along with other attributes and I can render the image on the screen normally in a list. From the list, I can access a record editing form that is automatically populated with data coming from the bank. My problem is in the BLOB field that is not populated in the edit screen. What would be the best way to edit this image, along with the other fields?