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The false-color image produced from the above allows easy evaluation of accuracy of classification. Green pixels are green, residue is blue-purple, soil is red-black.

Ambiguous (unclassified) pixels are in the orange-yellow color. Note the residue in the lower left corner that has been misclassified as green - comparison with the original image shows that this item has a purplish color to it - it was classified as purple, and so got combined with the green. Altering thresholds to avoid this misclassification would likely lead to classification of purple rye leaves as residue.
The false-color image produced from the above allows easy evaluation of accuracy of classification. Green pixels are green, residue is blue-purple, soil is red-black.
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