| AbstractImageSegmentationContainerOperation | 
 Abstract base class for operations that require multiple images. 
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| CompareAnnotationWithPrediction | 
 Compares a prediction (first container) with the annotation
 (second container) and outputs a color image per label that shows
 the correct overlaps, the missed annotations and additionally
 predicted pixels. 
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| CompareAnnotationWithPredictionStats | 
 Compares a prediction (first container) with the annotation
 (second container) and outputs statistics per label:
 correct overlaps (count/%), the missed annotations (count/%) and additionally
 predicted pixels (count/%), Intersect-over-Union, Dice coefficient. 
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| ConfusionMatrix | 
 Evaluates a prediction (first container) against the annotation
 (second container) and outputs a spreadsheet with the confusion matrix. 
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| CountPixels | 
 Counts the pixels and generates a spreadsheet with count per layer. 
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| EvaluatePrediction | 
 Evaluates a prediction (first container) against the annotation
 (second container) and outputs a spreadsheet with the results. 
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| PassThrough | 
 Dummy, just passes through the containers. 
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| SimpleOverlay | 
 Combines base image (or just background color) and layers into a single image. 
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