EE/CSE 576: Image Understanding

Spring 1999

Course Software: chainpix output format

Here is a sample chainpix output file:

256 256
list:   1
   9    4
   9    5
   9    6
   9    7
  10    8
  10    9
  10   10
  10   11
  -1    0
list:   2
   70   4
   70   5
   70   6
   71   7
   71   8
   -1   0
list:   3
  211   5
  210   5
  209   6
  208   5
  207   5
  206   6
   -1  -1
total number of lists: 3

The first row gives the number of columns and rows in the input image. Then there are lists of pixels&emdash;each begins with a list ID (this becomes the string ID when fex segments the lists into straight-line and circular-arc segments), then a list of pixels, terminated by "-1 0" if another list follows, or "-1 -1" if this is the last list. The last line gives the number of lists.