Data Rate Viewer using C++

The tool metavision_data_rate filters noise and displays event rate from a live camera or an event file (RAW or HDF5). The noise is filtered using the following algorithms:

By default, the Activity noise filter is already activated. You can activate other filters and adjust their thresholds via command-line options.

The source code of this tool can be found in <install-prefix>/share/metavision/sdk/cv/cpp_samples/metavision_data_rate when installing Metavision SDK from installer or packages. For other deployment methods, check the page Path of Samples.

Expected Output

The tool visualizes CD event rate from an event-based device or a event file (RAW or HDF5) after filtering:

How to start

You can directly execute pre-compiled binary installed with Metavision SDK or compile the source code as described in this tutorial.

To start the tool based on recorded data, provide the full path to a file (Here, we use the file spinner.hdf5 from our Sample Recordings):

Linux

metavision_data_rate -i spinner.hdf5

Windows

metavision_data_rate.exe -i spinner.hdf5

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

Linux

metavision_data_rate

Windows

metavision_data_rate.exe

To start the sample on live stream with some camera settings (like the biases mentioned above, or ROI, Anti-Flicker, STC etc.) loaded from a JSON file, you can use the command line option --input-camera-config (or -j):

Linux

./metavision_data_rate -j path/to/my_settings.json

Windows

metavision_data_rate.exe -j path\to\my_settings.json

To check for additional options:

Linux

./metavision_data_rate -h

Windows

metavision_data_rate.exe -h