sir,I am using drive database for retinal bllod vessel extraction using matched filter and matched filter with first derivative of gaussian.But I am not getting good accuracy.I am attaching my code and paper and please notify me about the problem.

Sir, I am using all these codes but I don't know where the problem is. The accuracy of the paper as compared to mine are very bad. The paper name is Blood vessel extraction by matched filter and matched filter with first derivative of gaussian.