Metrics Space and Norm: Taxonomy to Distance Metrics

Table 2

Literature summary of loss metrics and sample selection.

Sample selection	Metric loss	Task
Easy	Triplet [107]	Recognition of image
		Recognition of object
Multiple negative	Angular [101]	Clustering of image
		Retrieval of image
Multiple negative	N-pair [108]	Verification of object
		Clustering of image
		Identification of face
		Verification of face
		Recognition of object
Easy	Clustering [109]	Clustering of image
		Retrieval of image
Easy	Histogram [103]	Person re-Identification
		Recognition of image
		Retrieval of image
Hard negative	Contrastive [89]	Object recognition
		Image recognition
Semi-hard negative	Quadruple [102]	Patient similarity
Easy	Part [106]	Person re-Identification
Anchor-neighbor	Hierarchical triplet [100]	Recognition of face
		Retrieval of image