(self, tol)
Check if there is some content in the image
        :param tol: tolerance
        :return:True if image is contentful, otherwise false
Check if there is some content in the image
        :param tol: tolerance
        :return:True if image is contentful, otherwise false
Check if there is some content in the image : param tol : tolerance : return : True if image is contentful otherwise false
def checkImage(self, tol):
        """
        Check if there is some content in the image
        :param tol: tolerance
        :return:True if image is contentful, otherwise false
        """
        # print numpy.std(self.dpt)
        if numpy.std(self.dpt) < tol:
            return False
        else:
            return True
def checkImage ( self , tol ) : # print numpy.std(self.dpt) if numpy . std ( self . dpt ) < tol : return False else : return True