text: from simplecv._impl.metric.confusion_matrix import ConfusionMatrix
  from simplecv._impl.metric.miou import THMeanIntersectionOverUnion
  from simplecv._impl.metric.miou import THMeanIntersectionOverUnion as THmIoU
  from simplecv._impl.metric.miou import NPMeanIntersectionOverUnion
  from simplecv._impl.metric.miou import NPMeanIntersectionOverUnion as NPmIoU
  from simplecv._impl.metric.pixel import NPPixelMertic