# getMaximumHeadWidthRatio method

int getMaximumHeadWidthRatio()

Gets the value indicating if the image width is conform to the (image width / head width) ratio of 7:5. The head width is defined as the distance between the left and right ears. For ICAO compliance, the value must be in the range 50 to 75. Hint: Default value is 75.

return Value indicating if the image width is conform to the (image width / head width) ratio of 7:5. throws FaceException An error has occurred during Face Library execution.

## Implementation

    int getMaximumHeadWidthRatio() {
      Pointer<Int> pMaximumHeadWidthRatio = calloc();
      try {
        var err = faceSDK.id3FacePortraitProcessor_GetMaximumHeadWidthRatio(_pHandle.value, pMaximumHeadWidthRatio);
        if (err != FaceError.success.value) {
          throw FaceException(err);
        }
        final vMaximumHeadWidthRatio = pMaximumHeadWidthRatio.value;
        return vMaximumHeadWidthRatio;
      } finally {
        calloc.free(pMaximumHeadWidthRatio);
      }
    }