Cypress provides the API CyU3PI2cReceiveBytes to customer to read some bytes from I2C slave.
However, the device address and register address are necessary.
You have two options here.
1. Contact OmniVison to get the datasheet and configuration bytes.
2. Capture the I2C communication while the boards is running. You could get the device address and see many I2C bytes are sent in this procedure.