Geometric

Operate on the geometries of objects like bounding boxes, polygons, and polylines.

Title	Metric Type	Data Type
Annotation Duplicates - Ranks annotations by how likely they are to represent the same object	image	bounding box, polygon, rotatable bounding box
Annotation closeness to image borders - Ranks annotations by how close they are to image borders.	image	bounding box, point, polygon, polyline, rotatable bounding box, skeleton
Detect Occlusion in Video - Tracks objects and detect outliers	sequence	bounding box, rotatable bounding box
Frame object density - Computes the percentage of image area that's occupied by objects.	image	bounding box, polygon, rotatable bounding box
Object Area - Absolute - Computes object area in amount of pixels	image	bounding box, polygon, rotatable bounding box
Object Area - Relative - Computes object area as a percentage of total image area.	image	bounding box, polygon, rotatable bounding box
Object Aspect Ratio - Computes aspect ratios of objects	image	bounding box, polygon, rotatable bounding box
Polygon Shape Similarity - Ranks objects by how similar they are to their instances in previous frames.	sequence	polygon
Shape outlier detection - Calculates potential outliers by polygon shape.	image	polygon

Annotation Duplicates

Ranks annotations by how likely they are to represent the same object.

Jaccard similarity coefficient is used to measure closeness of two annotations.

Implementation on GitHub

Annotation closeness to image borders

This metric ranks annotations by how close they are to image borders.

Implementation on GitHub

Detect Occlusion in Video

This metric collects information related to object size and aspect ratio for each track and find outliers among them.

Implementation on GitHub

Frame object density

Computes the percentage of image area that's occupied by objects.

Implementation on GitHub

Object Area - Absolute

Computes object area in amount of pixels.

Implementation on GitHub

Object Area - Relative

Computes object area as a percentage of total image area.

Implementation on GitHub

Object Aspect Ratio

Computes aspect ratios ($width/height$) of objects.

Implementation on GitHub

Polygon Shape Similarity

Ranks objects by how similar they are to their instances in previous frames based on Hu moments. The more an object's shape changes, the lower its score will be.

Implementation on GitHub

Shape outlier detection

Computes the Euclidean distance between the polygons' Hu moments for each class and the prototypical class moments.

Implementation on GitHub