How the binary objects are sorted

Live treatment image "IMAQ particle analysis" and "IMAQ MaskToROI.vi" returns the characteristics of binary objects detected in a specific order. My question is how objects are sorted before results are returned.

Look at the following example. I'm totally confused why two screws returned the second object in the first row first?

I was trying to get the centers of each object (and their contours) and assuming that they were sorted by their positions on the y-axis first and then positions itself on X. It is most of the time, until you see here on the first line. What happened here? Why the second object is sorted as the first object? HOW the binary objects are sorted anyway?

I got it. It has to be sorted by the corner up and left of the rectangle of the object.

Tags: NI Hardware

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