~F86. IMAGE NODE FORMAT.

	_____________________________________________ 
	word |        CW         |        CCW        |
	  0  |              image ring               | 3
	_____|___________________|___________________|
	word |        DAD        |        SON        |
	  1  |        film       |     1st level     | 3
	_____|___________________|___________________|
	word |       type        |       reloc       |
	  2  |                   |      33 0000      |
	_____|___________________|___________________|
	word |                   |                   |
	  3  |       ---         |       ---         | 0
	_____|___________________|___________________|
	word |                   |                   |
	  4  |       ---         |       ---         | 0
	_____|___________________|___________________|
	word |                   |                   |
	  5  |       ---         |       ---         | 0
	_____|___________________|___________________|
	word |                   |                   |
	  6  |       ---         |       ---         | 0
	_____|___________________|___________________|


	Every image belongs to  the film pointed to by  the DAD link;
the  ring of images of  the film is  formed in the CW  and CCW links;
the son of an image  is its first level  and that first level is  the
-1 intensity cut level of the image.

	Although an  affront to  common sense, the  counter clockwise
direction  about the image ring is positive  or later in time and the
clockwise direction is negative  or earlier in time. I  achieved this
curio  by consistently  adhereing to  the mathematical  convention of
counter clockwise as positive; and a day came when counter  clockwise
around a ring of real time events was  represented in the same manner
as counter clockwise around a polygonal ring of edges.

	All the empty space in the image node is reserved for camera
specification data.
~I1973,800;F8- 17 -