case1.4: Generate Circular Fiducial Polygon

  This is used to generat a circular polygon to use in Extracting a Circular Section of Each Slice, ie. a Cylindrical Subvolume of a 3D data set.

Input Data Options
	special purpose data requiring pre-processing (0)
	tomographic data (1)
	segmented data (2)
	burn data (3)
	medial axis data (4)
	throat data (5)
Enter choice: 1

Data Processing Options
	plot image (1)
	plot slice histograms (2)
	resize tomographic data (3)
	generate circular fiducial polygon (4)
	segment data (5)
	porosity/cut_off dependence (6)
	investigate dfn K values (7)
	investigate dfn threshold values (8)
	|grad image| histogram (9)
	compress data in z direction (10)
Enter choice: 4

Enter the center of the circle (x,y): 255 255
Enter the radius of the circle: 255
Enter name of output file: fpoly