Accuracy assessment
Assessment of classification accuracy is the procedure used to quantify
the reliability of classified image. Accuracy assessment of image
classification 1979, 1989, 1999, 2009 and 2019 images were carried out
to determine the quality of information obtained from the data. For each
classified images it is essential to perform an accuracy assessment in
order to obtain a useful data for the change detection and analysis
(Owojori and Xie, 2005). In this study stratified random sampling was
done by comparing the reference image with classified image with some
random points. The accuracy assessment was obtained using 50 random
points of every classified image. In addition, a nonparametric Kappa
test was also applied to assess the extent of classification accuracy.