Eliminating unwanted pixels

[Greg McKaskle]

The size ordered morphology VI is just a wrapper around the particle analysis report that will return any number of measurements about the particle. Before doing so, it sorts them by area.

If for example, you wanted the center of mass instead of the center of the bounding rectangle, you might just go to the diagram, grow the array constant, and select those from the list of measurements. If you want more info on what those measurements are, open the Vision Concepts manual. I think it is in the Programs/National Instruments/Vision/...

[Loubear]

You don't necessarily need to sort the particles with your own code. The NI vision package includes particle filters that can filter out outlying particles and stray pixels. You can experiment with them in Vision Asssistant under binary, then "Particle Filter" or "Adv. Morphology." We're currently using the "remove small particles" feature of the latter.