What is the compensation due to an imprisoned defendant in the Islamic system upon proof of their innocence?

The question of compensation for wrongful imprisonment arises from the current reality, not from the Islamic system. In the Islamic system, an accused person is innocent until proven guilty. Imprisonment is for a legitimate religious interest, and the judiciary is swift. If a judge errs and an innocent person is wrongly convicted, that person is compensated from thet Baitul-Mal (public treasury) for the damage incurred.