Question
Kappa coefficient
Answer :
Word Count : 269
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Kappa coefficient is a statistical measure used in remote sensing and image interpretation to assess the accuracy of classification results. It evaluates the agreement between classified images and reference data, considering the possibility of agreement occurring by chance. Unlike overall accuracy, which simply measures the proportion of correctly classified pixels, the Kappa coefficient provides a more robust and reliable assessment by factoring in random agreement. Mathematically, the Kappa coefficient (κ) is defined as the ratio of the difference between observed accuracy and expected accuracy to the maximum possible difference between perfect agreement and expected accuracy. It is expressed as: κ = (Po
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