... performance in comparison to the base (ICA-CDWS) classification Interestingly, the recall score for image is one of only two images, where the stacking without feature extraction outperformed stacking ... the watershed algorithm, abbreviated as ws as a feature extraction step mapping P {1} → f {ws} , while the watershed process can be viewed as an unsupervised classifier The heterogeneous stacking ... Subsequently, stacking, [9] is utilized to combine the output of the aforementioned classifiers in order to produce improved markers and object-background boundaries The concept is called heterogeneous stacking...