# getMaximumHeadHeightRatio method

int getMaximumHeadHeightRatio()

Gets the maximum distance between the base of the chin and the crown is less than 80% of the total height of the image. For ICAO compliance, this distance must be in the range 60 to 90. Hint: Default value is 90.

return Maximum distance between the base of the chin and the crown is less than 80% of the total height of the image. throws FaceException An error has occurred during Face Library execution.

## Implementation

    int getMaximumHeadHeightRatio() {
      Pointer<Int> pMaximumHeadHeightRatio = calloc();
      try {
        var err = faceSDK.id3FacePortraitProcessor_GetMaximumHeadHeightRatio(_pHandle.value, pMaximumHeadHeightRatio);
        if (err != FaceError.success.value) {
          throw FaceException(err);
        }
        final vMaximumHeadHeightRatio = pMaximumHeadHeightRatio.value;
        return vMaximumHeadHeightRatio;
      } finally {
        calloc.free(pMaximumHeadHeightRatio);
      }
    }