digitizing hand drawn ER digram into relational model

so i have project so i like there sholud be hand drawn er digram i need to indetify all er digram shpes like entity,attributes relationships and etc. first i need to identify these shapes and then i need to create relational schema .just text for that er [login to view URL] to identify the primary key to. and all so need to identify what is the relation ship like(one to one ,one to many,many to many)then i need to create the relational schema according to that. I also attached the what kind of shapes are there.(using opencv and python)actualy when there is a hand drawn er digram we need to create relational model like text. this is sample output for attached er Student{st_id(primary_key),Name,Age} School{sc_id(primary),sc_Name,District,st_id(foreign_key)}