Local Binary Patterns Histograms Regions

I know that the representation proposed by **Ahonen et. al.** is to divide the LBP image into x local regions and extract a histogram from each region. How many regions **OpenCV** uses to extract these histograms? Is this a fixed number of regions or can I define this as a parameter? I am using the **LBPH** function on **Python**, for example: lbph = cv2.face.createLBPHFaceRecognizer() lbph.train(trainingImages, np.array(labels)) subject, confidence = lbph.predict( image ) Thanks in advance