how to write matlab code to calculate recognition rate?

I am doing a proj on dct based face recognition n its comparative analysis wit pca.. how can i write code to calculte recognition rate so it can calculat the rate automatically for diferent inputs???

Answer 1

[Walter Roberson]

recognition_rate = number_of_faces_recognized / number_of_faces_presented;

[swathi]

Bt how will the code keep track of all recognized faces??? my code is DCT based face recognition.. for each input the code is run seperatly...

[Walter Roberson]

number_of_faces_recognized = 0;
number_of_faces_presented = 0;
for K = 1 : number_of_face_images
  face_image = imread() of the K'th face image
  was_it_recognized = try_to_recognize_face(face_image);
  number_of_faces_presented = number_of_faces_presented + 1;
  number_of_faces_recognized = number_of_faces_recognized + was_it_recognized;
end
recognition_rate = number_of_faces_recognized / number_of_faces_presented;

[SAMVIT MAHARAJ]

Sir, I am also having the same problem. I dont understand the line you wrote

 face_image = imread() of the K'th face image
  was_it_recognized = try_to_recognize_face(face_image);
what is this Kth image and the next line