.. _`Filter unique lines`:

.. _`com.sympathyfordata.imageanalysis.filter_unique_lines`:

Filter unique lines
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.. image:: image_uniquelines.svg
   :width: 48


Filters a table with lines (x0,y0, x1,y1) to only keep the longest ones that are not contained by any other. Commonly used after a Hough transform (see Extract Image node)




Documentation
:::::::::::::

Filters a table with lines to only keep the longest
ones that are not contained by any other.


Definition
::::::::::


Input ports
...........

    **lines**  table
        Input lines


Output ports
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    **result**  table
        Filtered lines




Configuration
.............

    **distance** (distance)
        Distance in pixels around which smaller lines are rejected
    **Starting X** (x0)
        Name of column containing X-coordiantes for the starting points
    **Ending X** (x1)
        Name of column containing X-coordiantes for the ending points
    **Starting Y** (y0)
        Name of column containing Y-coordiantes for the starting points
    **Ending Y** (y1)
        Name of column containing Y-coordiantes for the ending points









Implementation
..............

.. automodule:: node_lines
    :noindex:

.. class:: UniqueLinesNode
    :noindex: