Adafruit fingerprint code explanation

[dkanday]

@dkanday

  uint8_t fingerTemplate[512]; // the real template
  memset(fingerTemplate, 0xff, 512);


  // filtering only the data packets
  int uindx = 9, index = 0;
  while (index < 534) {
    while (index < uindx) ++index;
    uindx += 256;
    while (index < uindx) {
      fingerTemplate[index++] = bytesReceived[index];
    }
    uindx += 2;
    while (index < uindx) ++index;
    uindx = index + 9;
  }
  for (int i = 0; i < 512; ++i) {
    //Serial.print("0x");
    printHex(fingerTemplate[i], 2);
    //Serial.print(", ");
  }
  Serial.println("\ndone.");
}

//print the fingerprint template
void printHex(int num, int precision) {
  char tmp[16];
  char format[128];

  sprintf(format, "%%.%dX", precision);

  sprintf(tmp, format, num);
  Serial.print(tmp);

This code is an example code from Adafruit for its fingerprint sensor, to scan the fingerprint and give its signature on the serial monitor.
I am trying to capture the signatures and store it in a database.