RegionSimilarityMsr
            Contains the similarity indicator values computed between an image and a reference.
Similarity results are represented as arrays, each element representing a label. The custom index is used to browse the input labels.
		Similarity results are represented as arrays, each element representing a label. The custom index is used to browse the input labels.
Object members
| Measurement name | Description | Element type | Indexing | 
|---|---|---|---|
| sensitivity | The true positive rate, between 0 and 1. | Floating point | [label] | 
| specificity | The true negative rate, between 0 and 1. | Floating point | [label] | 
| dice | The Sorensen Dice coefficient, between 0 and 1. | Floating point | [label] |