Tutorials

These tutorials walk through the main HV Explorer workflows from opening a datacube to calibration, annotation, spectral analysis, PCA, machine-learning previews, export, and live recording. Follow them in order for a complete first pass, or use the workflow diagrams below to jump to the part of the application you need.

Example data

Qtec provides example datacubes for following the HV Explorer tutorials. The datasets were captured using the Buteo Hyperspectral Imaging System.

The shared folder contains several datasets that can be used for exploration, classification, regression, and preprocessing examples:

Dataset	Typical use
Mixed nuts	Practice ROI creation, spectra comparison, PCA, and classification across almonds, hazelnuts, and walnuts.
Minced meat	Compare fat-content classes and inspect scans with and without plastic pieces.
Sugar and sugar-free drinks	Explore subtle spectral differences between similar-looking liquids.
White powders	Compare sugar, powdered sugar, flour, starches, salt, and coffee creamer, including examples with plastic pieces.
Milk products	Compare fat levels in milk and cream products, with and without plastic pieces.
Real and artificial leaves	Practice material separation between visually similar organic and plastic samples.
Beer and non-alcoholic beer	Explore liquid samples with related but different composition.
Water and spirits	Compare transparent liquids such as water, vodka, and white rum.
PLA and PETG plastics	Practice plastic classification using two material classes with different shapes.

Suggested workflow

A typical HV Explorer workflow follows these tutorials in order:

1. Getting Started: learn the interface, open a datacube, configure the preview, and inspect metadata.
2. Calibration and Setup: add wavelength information and convert raw measurements to reflectance.
3. Annotations and Spectra: create ROIs, assign properties, and compare spectral signatures.
4. PCA and ML: inspect grouping, train models, and preview or apply predictions.
5. Advanced Processing and Export: add preprocessing or data reduction, generate PCA images, and export results.
6. Recording: connect a camera, adjust exposure and focus, capture references, and record datacubes.

Workflow diagrams

The diagrams below summarize how the tutorial pages fit together. Use the Basic workflow for a typical exploratory analysis. The Advanced workflow adds preprocessing, reduction, exports, and model application.

Relevant tutorials:

• Getting Started
• Calibration and Setup
• Annotations and Spectra
• PCA and ML
• Advanced Processing and Export
• Recording

Basic

Advanced

HV Explorer uses a non-destructive, lazy processing workflow. Display settings and operations can be adjusted without modifying the source datacube.