shape indexing

for many application of shape description we need the shape indexes by their order of close distance

this application receives binary image / matrix . it returns the indexes of rows and columns by the order . each next point is the close one. so indexes are by order . not as retuned by the find command.
also if someone can improve the steps after pdist to use linkage or dendrogram. it is useful for fourier descriptor of shape or to find if point inside polygon so all points are ordered .