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Representative spectrum

Takes the spectrum from x numbers of pixels to make representative spectrum. The pixels can be chosen in one out of five methods.



  • Evenly spread

    • The pixels are evenly spread across the images/objects.

  • Random

    • The pixels are randomly spread across the images/objects.

  • Random(Gaussian)

    • The pixels are randomly spread with a larger concentration of pixels in the center of the images/objects.

  • Spectral binning

    • The pixels are distributed using PCA to get a spread containing a variety of spectrum for the objects.

  • Spectral space filling

    • The pixels are distributed using PCA and iterated to find the spectrum containing the best variety to describe the spectrum of the objects.

  • Spectral Clustering (k-means)

    • The pixels are distributed using k-means clustering to partition the pixels into k number of clusters and select pixels for the partitioned clusters.


Number of the representative spectrum.


✅ Adds only unique spectrum

⬜ Can have the same spectrum from different representative spectrum pixels.


Size of the objects created from the segmentation

1x1 will create objects 1 pixel in size.


Only applicable for Spectral Clustering (k-means)

Specify number of clusters () to partition the observations into.

Applies to

Only visible when applicable

When Applies to is used only objects from the selected segmentation will be used for the next segmentation on the analyse tree.

Only objects from Sample2 will be used for Representative spectrum segmentation

This is denoted by the dashed line from the Object node to the segmentation which only is applied to a subset of all applicable segmentation.

Only visible when applicable

Link output objects from two or more segmentations to top segmentation. Descriptors can then be added to the common object output and will be calculated for objects from all segmentations.

Descriptors after object will be calculated for all three segmentations (Sample1, Sample2 and Sample3)

The segmentations must be at same level to be available for linking.

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