return isNumber(calibrationCenter.x) && isNumber(calibrationCenter.y)
      && isNumber(size.width) && isNumber(size.height)
      && ((Math.abs(size.width / 2 - calibrationCenter.x) < 5
        && Math.abs(size.height / 2 - calibrationCenter.y) < 5)
        || (Math.abs(size.height / 2 - calibrationCenter.x) < 5