improved cost function
better render points of the line
fix rendering
fix error with value of obj matrix
Merge branch 'master' of git://github.com/remusao/LineExtraction.jl
get a line with lot of noise
selecting only one pixel by column.
pushing faster version
trying to find curves for cost function depending on distance between start and row, row and prev row, etc.
storing the index now
good results but take a lot of time