Blob Detection

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Calibration/Blob Detection

Identifies connected blobs in a texture. ​

Description

The Blob Detection box analyzes the input texture for continuous regions (blobs) in order to extract 2D location. A region is outputted as a blob if it matches the minimum and maximum normalized area conditions. For optimal detection, the input texture should be saturated.

General Use Case: The box is used to detected blobs from a detection device or a texture.

Inputs

Texture 2D Texture Receives the texture to process.

Outputs

Blobs 2D Points Outputs the coordinates in pixels of the center of each blobs in a vector.
Data View 2D Render Target Outputs the data view of the detected continuous region of the texture.
Dimensions Float2 Vector Outputs the dimensions in pixels of each blob's bounding box, in a vector.

Parameters

General

Enable Minimum Blob Area Toggle Enables the Minimum Blob Area filter.
Minimum Blob Area Float Sets the minimum area for a region to be considered as a blob, as Normalized Screen Coordinates, a fraction of the input texture area.
Enable Maximum Blob Area Toggle Enables the Maximum Blob Area filter.
Maximum Blob Area Float Sets the maximum area for a region to be considered as a blob, as Normalized Screen Coordinates, a fraction of the input texture area.
Ignore Black Blobs Toggle When enabled, ignores blobs made of black pixels.
Enable Output Pin: Data View Toggle Enables the Data View Output Pin.

See Also

Boxes related

Blob Tracking, Polar Keystone, Get Item, Point Mapping, ​​

Version Information

Current documentation version: 2.1.1. ​ ​