~{EF8INTRODUCTION.

	The  second design  choice, of  multi  image anaylsis  rather
than single  image analysis, provides a basis  for solving for camera
positions and feature  depths.   The third design  choice solves  (or
rather avoids)  the problem of  integrating an edge  finder's results
into  an image. By using a very  simple edge finder, and by accepting
all the edges found, the image structure is never lost.   This design
postpones the  problem of interpreting photometric  edges as physical
edges.

	The  fourth  choice  is  a  resolution   to  write  an  image
processor  that does  not requires  operator assistance  or parameter
tuning. The fifth  choice of the 216  by 288 fixed  window size is  a
sin that  proved surprisingly  expedient,  it  is explained  later. A
variable  window version of CRE  at halves,   thirds and other simple
fractions of  its present  window size will  be made  at some  future
date.

	The  final design choice  of using  machine language  was for
the  sake  of  implementing  node  link  data  structures  that   are
processed 100 faster  than LEAP, 10  times faster than  compiled LISP
and  that require significantly  less memory  than similar structures
in either LISP or LEAP. Furthermore machine code assembles  and loads
faster  than  higher  level  languages;   and  machine  code  can  be
extensively fixed and altered without recompiling.

	It  is  my  impression  that  CRE  does  not  raise  any  new
scientific problems;  nor does it  have any  really new solutions  to
the old  problems; rather CRE is another  competent video region edge
finding program with its  own set of tricks.  However, it is  further
my impression that the particular tricks for  smoothing,  nesting and
comparing polygons in CRE are original as programming techniques.

	The intended use  of CRE is  illustrated by the  sequences of
turn  table  pictures  on  pages  1  and  3.  The figures on  page  5
illustrate the quality  of contoured images over  a range of  subject
matter. Finally the application of CRE  to typography  is illustrated
below:

{Christmas  Font

     A B C D E F G H I J K L M N O P Q R S T U V W X Y Z.

              a b c d e f g h i j k l m n o p q r s t u v w x y z.}

ACKNOWLEDGEMENT.

	Tovar Mock assisted me with  the development of the type font
making program,   TVFONT.
~I1973,800;F8- 4 -