Spectral Image Labeler

Label hyperspectral and multispectral images

Since R2026a

Description

Add-On Required: This feature requires the Hyperspectral Imaging Library for Image Processing Toolbox add-on.

The Spectral Image Labeler app enables you to label ground truth data in hyperspectral and multispectral images for applications such as pixel classification and semantic segmentation. Using the app, you can:

• Load images stored in files or from the workspace.

• Choose false color, RGB, CIR, or custom views of spectral images for ease of labeling.

• Create multiple label definitions to label regions of interest (ROIs). Label ROIs using built-in automatic and manual techniques.

• Write, import, and use your own custom automation algorithm to automatically label ground truth data.

• Export the labeled ground truth data as a groundTruthSpectralImage object. You can use this object to share labels with colleagues or to store ground truth labels for pixel classification or semantic segmentation.

To learn more about this app, see Get Started with Spectral Image Labeler.

Note

The Hyperspectral Imaging Library for Image Processing Toolbox™ requires desktop MATLAB^®, as MATLAB Online™ and MATLAB Mobile™ do not support the library.

Open the Spectral Image Labeler App

• MATLAB Toolstrip: On the Apps tab, under Image Processing and Computer Vision, click the Spectral Image Labeler app icon.

• MATLAB command prompt: Enter spectralImageLabeler. For more information, see Programmatic Use.

Examples

• Get Started with Spectral Image Labeler
• Segment Hyperspectral Image Using Segment Anything Model in Spectral Image Labeler

Programmatic Use

spectralImageLabeler opens the Spectral Image Labeler app to a new session in which to label spectral image data.

spectralImageLabeler(spcube) opens the Spectral Image Labeler app, loading the hypercube or multicube object spcube into the app.

spectralImageLabeler(cube) opens the Spectral Image Labeler app, loading the 3-D array cube. When not loading a hypercube or multicube object, the capabilities of the app are limited.

spectralImageLabeler(gTruth) opens the Spectral Image Labeler app, loading the data, label definitions, and labels from the groundTruthSpectralImage object gTruth.

spectralImageLabeler close closes all open instances of the Spectral Image Labeler app.

Version History

Introduced in R2026a