Note

This C++ sample has a corresponding Python sample.

Filtering using C++

The sample metavision_filtering.cpp shows how to use Metavision Core SDK pipeline utility to filter and display events. It also shows how to capture the keys pressed in a display window and use them to modify the behavior of the stages while the pipeline is running.

The following filters can be applied via keyboard keys:

• r - Metavision::RoiFilterAlgorithm

• p - Metavision::PolarityFilterAlgorithm used to show only events of positive polarity

• n - Metavision::PolarityFilterAlgorithm used to show only events of negative polarity

Expected Output

The sample visualizes CD events from an event-based device or a RAW file after filtering:

How to start

First, compile the sample as described in this tutorial.

To start the sample based on the live stream from your camera, run:

Linux

./metavision_filtering

Windows

metavision_filtering.exe

To start the sample based on recorded data, provide the full path to a RAW file (here, we use the file spinner.raw from our Sample Recordings):

Linux

./metavision_filtering -i spinner.raw

Windows

metavision_filtering.exe -i spinner.raw