The doc leaves me with some doubts regarding Line segment extraction

1. Is this the hough transform?
2. If not, is there a Hough transform with otbcli app?
3. In case of multi-spectral image, how does this algorithm proceed? does it
select just the first band?
4. Last, but not least, running the example of the Cook book
(QB_Suburb.png image) on Monteverdi one gets this in Qgis
https://dl.dropboxusercontent.com/u/3180464/Screenshot%20at%202016-01-19%2010%3A35%3A41.png

Besides the fact of not seeing the vector overlaid on the image of the example
(after years...)
I do not see the result as providing a good line segment extraction.
Am I doing something wrong?

Agus

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