I have a small device which scans fingerprints. There i have an image of the fingerprint. I hope i can get some “Bio-ID” of this fingerprint image and send this id to a server. The server side can only execute php.
There i like to compare this “Bio-ID”. In the best case no php libraries are required and the “Bio-ID” just can be compared as a string. I like to authenticate a user, which means i have to compare the fingerprints.
It would work like on this picture described:
Is is important that on the server side it is only possible to use php (no special configuration), so it would be great if the fingerprint could be sent as a string and this string can be compared to other strings without much effort.
Thank you very much
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Answer
So I am assuming your question is “What are the next steps I need to do in order to get this system to work”.
Well since you already have a scanner (Futronic FS88h), which gives you a bitmap, then you have to pass this bitmap through an algorithm that changes it into a string. You mentioned that in the best case scenario you wish not to use a library, however that will be more complicated for you if you didn’t. A library is a collection of code that someone has already developed for a specific purpose. If you don’t want to use a function someone else created to get your fingerprint string from your bitmap, you will have to create it yourself, which is a million times more difficult.
My suggest would be:
- find a library that has the algorithm in it to change a fingerprint into a string.
- install that library into the server you are using
- create the php functions that then
- Stores these fingerprint values into a database or whichever is your preferred method of storage
- Compares a users fingerprint with all the fingerprints in storage
- Deletes fingerprints stored
That should help you move forward