Content deleted Content added
end
</lang>
zs may be used: See [[Zhang-Suen thinning algorithm/smallRC.csv]] for the input file contents.
<lang ruby>
s2.each{|row| row.each{|col| print(col==1? "#": " ")}; print("\n")}
while @r == 1
@r = 0
(1...s2.length-1).each{|n| (1...s2[0].length-1).each{|g| s1[n][g] = s2[n][g] - zs(s2[n-1..n+1].collect{|n| n[g-1..g+1]},0)}}
(1...s2.length-1).each{|n| (1...s2[0].length-1).each{|g| s2[n][g] = s1[n][g] - zs(s1[n-1..n+1].collect{|n| n[g-1..g+1]},1)}}
end
s2.each{|row| row.each{|col| print(col==1? "#": " ")}; print("\n")}
</lang>
{{out}}
<pre>
######### ########
### #### #### ####
### ### ### ###
### #### ###
######### ###
### #### ### ###
### #### ### #### #### ###
### #### ### ######## ###
##### ####
# # # ##
# # #
# # #
#### # #
# ## #
# # #
# # ###### #
</pre>
To reproduce the output described in the task description it is necessary to call zs first with g=1 (though either way produces a valid thinned output): See [[Zhang-Suen thinning algorithm/bigRC.csv]] for the input file contents