Polygon Distance

Overview

The Polygon Distance node calculates the horizontal and vertical distance between the center points of two polygons. These calculations use normalized coordinates (0 to 1 range) to ensure consistent results across different image resolutions.

Use Polygon Distance when:

• You need to determine the proximity of two detected objects
• You want to trigger actions based on how far an object is from a reference zone

💡 Tip

This node is useful for calculating spatial relationships between objects, like determining if a product is close to a target bin.

Inputs

Name	Type	Description
first	polygon	The first polygon for distance calculation
second	polygon	The second polygon for distance calculation

Outputs

Name	Type	Description
horizontal	number	The horizontal distance between polygon centers
vertical	number	The vertical distance between polygon centers

Parameters

This node does not have any configuration parameters.

Example

Measuring distance between objects

A flow detects two separate parts on a conveyor belt and needs to ensure they are properly spaced. The Polygon Distance node computes their relative distance in the image frame.

Result: The node provides the specific horizontal and vertical distances between the two parts.

The Polygon Distance node calculates the horizontal and vertical distances between the centres of two polygons. The distances are normalized values to the image size.

Related links

Reference:

• Move Polygon — translates a polygon by given offsets
• Polygon Overlap — calculates area overlap between polygons