I want to use face recognition in the ETHEREUM dapp...Is there any way to do this?

Maybe an API?

I don't know

If you solve this please text me, I want to learn how to do it

Nope not possible with current gas costs

I want to do it in truffle with ganache cli.

Python face recognition API .

Sure

Offchain recognition is possible but it can't be used with blockchain
No benefits of this

Also Ganache is like local development blockchain,using it for face recognition is not one of its scope

I want to use facial recognition using python and then their image will be stored in ipfs and when the same person enters the ipfs stored image will be used to recognise the originality

I need to do use an API. Is there any way to achieve this

Infura has ipfs api
You will have to build python script for face recognition locally,use infura api to interact with ipfs

How to use this API?

Please have a look at infura Docs