Sign that detects blobs by OpenCV.

Detects blobs with specified parameters.

Not implemented

Not implemented

• Name (string, must be set) attribute unique name
• Type (string, must be "Blob") attribute type
• Weight (double, default: 1) attribute weight
• Probability (double, default: 0.75) not used in this attribute
• Contour (bool, default: true) not used in this attribute

• minThreshold (int, default: 10) The lower threshold of saturation between spots.
• maxThreshold (int, default: 200) The upper threshold of saturation between spots.
• blobColor (int, default: 0) Can be 0 or 255. 0 - for dark spots, 255 - for light spots.
• minArea (int, default: 1500) Minimum blob size.
• minCircularity (double, default: 0.1) The minimum threshold for the smoothness of the contour.
• minConvexity (double, default: 0.87) The minimum threshold of "raggedness" of the contour.
• minInertiaRatio (double, default: 0.01) The minimum threshold of inertia.

A good description of the parameters is given in this article, below is a picture from it.

<?xml version="1.0" ?>

<AttributeLib>
    
    <Attribute Name="MyBlobAttribute" Type="Blob" minThreshold="54" maxThreshold="125" blobColor="0" minArea="1500" minCircularity="0.03" minConvexity="0.64" minInertiaRatio="0.00"/>
    
</AttributeLib>

<SimpleObjectBase> 
    
    <SimpleObject Name="BlobPingui" ID="80">                   
        <Attribute Type="Detect">MyBlobAttribute</Attribute>        
    </SimpleObject>    
    
</SimpleObjectBase>

• For a selection of the best parameters for online video, it is recommended to use the utility attached to the package.