rt_detect_trigger.h File Reference

Threshold and edge-based trigger detection on streaming stim channels. More...

#include "../dsp_global.h"
#include <QPair>
#include <Eigen/Core>

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Namespaces
namespace	RTPROCESSINGLIB

Functions
DSPSHARED_EXPORT QList< Eigen::MatrixXi >	RTPROCESSINGLIB::toEventMatrix (QMap< int, QList< QPair< int, double > > > mapTriggers)
DSPSHARED_EXPORT QMap< int, QList< QPair< int, double > > >	RTPROCESSINGLIB::detectTriggerFlanksMax (const Eigen::MatrixXd &data, const QList< int > &lTriggerChannels, int iOffsetIndex, double dThreshold, bool bRemoveOffset, int iBurstLengthSamp=100)
DSPSHARED_EXPORT QList< QPair< int, double > >	RTPROCESSINGLIB::detectTriggerFlanksMax (const Eigen::MatrixXd &data, int iTriggerChannelIdx, int iOffsetIndex, double dThreshold, bool bRemoveOffset, int iBurstLengthSamp=100)
DSPSHARED_EXPORT QMap< int, QList< QPair< int, double > > >	RTPROCESSINGLIB::detectTriggerFlanksGrad (const Eigen::MatrixXd &data, const QList< int > &lTriggerChannels, int iOffsetIndex, double dThreshold, bool bRemoveOffset, const QString &type, int iBurstLengthSamp=100)
DSPSHARED_EXPORT QList< QPair< int, double > >	RTPROCESSINGLIB::detectTriggerFlanksGrad (const Eigen::MatrixXd &data, int iTriggerChannelIdx, int iOffsetIndex, double dThreshold, bool bRemoveOffset, const QString &type, int iBurstLengthSamp=100)

Detailed Description

Threshold and edge-based trigger detection on streaming stim channels.

SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2026 MNE-CPP Authors

Author

Christoph Dinh chris.nosp@m.toph.nosp@m..dinh.nosp@m.@mne.nosp@m.-cpp..nosp@m.org

Since

2.1.0

Date

March 2026

The functions in this header scan the rows of an incoming data matrix — typically the stimulus / digital-trigger channels of a MEG or EEG file — for sign or value transitions and return the sample index and amplitude of every detected flank. detectTriggerFlanks uses Eigen's maxCoeff over the per-sample derivative to localise rising edges, with optional de-bouncing controlled by a minimum inter-event distance.

toEventMatrix turns the per-channel QMap of detected events into the canonical three-column Eigen::MatrixXi event layout (sample, previous code, new code) consumed by the rest of the mne-cpp pipeline (averaging, epoching, annotations).

Definition in file rt_detect_trigger.h.