Search a MySQL database using blob data?

Is it possible to search through a MySQL database using blob data to find close matches with other blob data types?

I have created my database with images stored as blob. I was wondering if it was possible to take a picture similar to the one in开发者_开发知识库 the database, convert it to blob as well and use it to search the database to find the similar picture already there? My money is on no, but I thought I would just ask it anyways. And if it isn't possible would you mind giving a hint as to what I need to do in order to accomplish a task along the same lines as my question?

Thanks in advance!

Definitely not. MySQL has no idea what the bytes in your BLOB column mean -- it doesn't even know that they're images, let alone how to decode them and compare them for similarity. That's a far more complex computer vision task.