Work with Ground Truth Data

Select, merge, and load training data for deep learning

Select labels, change file paths to the data, and merge ground truth objects. You can share ground truth objects with labeling colleagues to continue labeling and training.

To share and review image labeling with colleagues, consider creating a project within the Image Labeling app. For more details, see Get Started with Team-Based Labeling.

Apps

Image Labeler	Label images for computer vision applications
Video Labeler	Label video for computer vision applications

Functions

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Select Labels

`selectLabelsByGroup`	Select ground truth labels by label group
`selectLabelsByType`	Select ground truth labels by label type
`selectLabelsByName`	Select ground truth labels by label name

Store and Post-process Labels

`groundTruth`	Ground truth label data
`merge`	Merge two or more ground truth objects (Since R2023b)
`pixelLabelDatastore`	Datastore for pixel label data
`boxLabelDatastore`	Datastore for bounding box label data (Since R2019b)
`changeFilePaths`	Change file paths in ground truth data
`writeVideoScenes`	Write video sequence to video file (Since R2021b)
`sceneTimeRanges`	Time ranges of scene labels from ground truth data (Since R2021b)
`gatherLabelData`	Gather label data from ground truth (Since R2021a)

Create Training Data for Object Detectors

`objectDetectorTrainingData`	Create training data for an object detector
`pixelLabelTrainingData`	Create training data for semantic segmentation from ground truth
`polyToBlockedImage`	Create labeled `blockedImage` object from set of ROIs (Since R2021b)
`merge`	Merge two or more ground truth objects (Since R2023b)

Enumerate Attribute and Label Types

`attributeType`	Attribute type enumerations for labeling
`labelType`	Label type enumerations for labeling

Topics

Elements of Ground Truth Objects
Understand how to save and pass data using a ground truth data object.
Share and Store Labeled Ground Truth Data
Share and store labeled ground truth data exported from labeling apps.
How Labeler Apps Store Exported Pixel Labels
Learn how the labeling apps store pixel label data.
Training Data for Object Detection and Semantic Segmentation
Create training data for object detection or semantic segmentation using the Image Labeler or Video Labeler.