class_docstr: This class enables the extraction of image features (Harilick
  features) and basic statistics over a segmentation
class_docstr_tok: ["This","class","enables","the","extraction","of","image","features","(","Harilick","features",")","and","basic","statistics","over","a","segmentation"]
docstr: creates the header string to be output as part of the result report
  
  :return:
docstr_tok: ["creates","the","header","string","to","be","output","as","part","of","the","result","report",":","return",":"]
code: def header_str(self):
      """
      creates the header string to be output as part of the result report
  
      :return:
      """
      result_str = [j for i in self.measures for j in self.m_dict[i][1]]
      result_str = "," + ",".join(result_str)
      return result_str
  
imports: from __future__ import absolute_import, print_function, division
  import numpy
  import numpy.ma
  import math
  import scipy.stats.mstats
  import scipy.ndimage
  from niftynet.utilities.util_common import MorphologyOps, CacheFunctionOutput
label_desc: Use image node_id 47 for calling the RegionProperties obj's underlying member method code with example usage: obj.header_str() and returns: result_str