Small Particle Filtering From Image

[shreya111]

Hello,

          Suppose I have 3 nuts having diameter 0.6 cm, 0.8 cm and 1 cm respectively. I want to pass 1 cm nut and reject other ones with the help of their areas using particle analysis and it should also show its area on front panel.

I  chose Heywood Circularity factor in particle filter 3 vi and Heywood Circularity factor, Center of mass X and Area in Particle Analysis vi. 

The problem is -

1 It sometimes accept another particles when I move the nut on another places .

2. the particle area it showing is different at different locations.

3. It doesn't showing exact no of particles .

I am attaching my VI and respected snapshot. Please give me valuable suggestions.

Waiting for favorable reply.

Thanks