sceneTimeRanges - Time ranges of scene labels from ground truth data - MATLAB (original) (raw)

Main Content

Time ranges of scene labels from ground truth data

Since R2021b

Syntax

Description

[timeRanges](#mw%5F00422be9-f915-4c23-a68b-6b88898bbdec) = sceneTimeRanges([gTruth](#mw%5F3dd1dcc2-e747-413f-a136-538ed41b3925)) returns the time ranges that define the start and end times for the scene labels applied to the ground truth data sources in gTruth.

example

[[timeRanges](#mw%5F00422be9-f915-4c23-a68b-6b88898bbdec),[sceneLabels](#mw%5F17c9e115-5478-41e4-986e-0b3e083180d5)] = sceneTimeRanges([gTruth](#mw%5F3dd1dcc2-e747-413f-a136-538ed41b3925)) also returns the scene labels that correspond to the time ranges.

Examples

collapse all

Load ground truth scene label definitions and label data into the workspace.

data = load("groundTruthSceneLabels.mat"); labelDefinitions = data.labelDefinitions; labelData = data.labelData;

Create a ground truth data source using a video file.

gSource = groundTruthDataSource("viptrain.avi");

Create a ground truth object using the ground truth data source.

gTruth = groundTruth(gSource,labelDefinitions,labelData);

Gather all the scene time ranges and the scene labels.

[timeRanges,sceneLabels] = sceneTimeRanges(gTruth);

Display the scene time ranges for the ground truth data.

ans = 3×2 duration 0 sec 8.0333 sec 8.3 sec 10.033 sec 12 sec 16.333 sec

Display the corresponding scene labels for the ground truth data.

ans = 3×1 categorical walking sitting trainMoving

Input Arguments

Output Arguments

collapse all

Time ranges of the ground truth source data, returned as an_M_-by-1 cell array. M is the number of elements ingTruth. Each of the cell array contains a_T_-by-2 duration matrix. T is the number of time ranges in the corresponding element of gTruth. Each row of the matrices corresponds to a time range in the ground truth data for which a scene label has been applied, specified in the form [rangeStart _rangeEnd_].

To select and obtain scene time ranges for specific signals in a groundTruthMultisignal (Automated Driving Toolbox) object, use the selectLabelsBySignalName (Automated Driving Toolbox) function before calling thesceneTimeRanges function.

Scene labels for each time range, returned as an _M_-by-1 cell array of _T_-by-2 categorical vectors. M is the number of elements in gTruth. T is the number of time ranges in each corresponding ground truth data source.

Version History

Introduced in R2021b