maple_boundary_test
10-Feb-2019 18:28:58

maple_boundary_test
  MATLAB version.
  Test maple_boundary.

MAPLE_BOUNDARY:
  Extract a polygonal boundary between a black exterior
  and a white interior, from an image of a maple leaf.

  Apply im=imread ( maple_bw.png ) to extract image data from file
  size(im) = 387 rows by 391 columns using 3 colors.
  im=im2bw(im,0.5) converts image to black and white (1 color).
  im=imcomplement(im) converts image to black around white.
  Exact relative area =       0.423264
  imshow(im) displays the image.
  bcell=bwboundaries(im) traces ALL the boundaries.
  b=bcell{1} extracts the first (and only, we hope) boundary.

  Polygonal boundary involves 1776 vertices.

  b(:,1)=387+1- b(:,1)) corrects reflected X coordinates.

MAPLE_BOUNDARY_PLOT
  Display a plot of the boundary of the maple leaf.

  Boundary plot saved as "maple_boundary.png"

MAPLE_BOUNDARY_VERTEX_PLOT
  Plot the boundary vertices of the maple leaf.

  Boundary vertex plot saved as "maple_boundary_vertex.png"

  Boundary vertices written to file "maple_boundary.txt"

maple_boundary_test
  Normal end of execution.

10-Feb-2019 18:29:03
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