Clever particle filter

Question

Hello,
I am trying to solve a task, where I need to exclude blobs in binary image based on the blob size,
the size treshold changes with the blob position.
Since this is not doable through the standard particle filter, I made mask out of results.
The algorithm is not fast enough + it keeps bad blobs if the later bounding boxes overlap them.
Please suggest some other method.
Bublina
Solved!
Go to Solution.

Answer 1

Hi Bublina!
Your method is a really good start, I would like to add a few ideas to it. First of all, you can add many objects (rectangles, ovals, points, etc.) to a single ROI descriptor, so it's easier to have all removed objects listed in a single ROI, then you can do the masking all at once. You can also fasten execution by using Particle Analysis.vi, which only performs the measurements selected by you, not all of them.
Here's some example code of these changes: (sorry for the picture instead of a snippet, my LV is acting up a bit)
Just replace the code at the red arrow with your decision-making code and it should work.
As you can see it is still quite a simple filter (it masks bounding rectangles), so if you have strangely shaped particles or your particles are too close together, some useful data might be erased. So if you need a more precise approach you could go by labeling your particles (so assigning a different color to each one), then deleting colors from the image based on criteria you specify.
I hope this helps.
Best regards:
Andrew Valko
NI Hungary
Andrew Valko
National Instruments Hungary