help needed with particle analysis (getting the pixel area of each particle)

[farhan]

Hello,

I am using a camera vision system to capture particles which works fine.

I am using particle analysis tool to get the number of particles and it also gives particle report.

I want the area of each particle HOWEVER the problem is that currently it does it only for 3 or 4 particles which is not good, and the number of particles can vary in each frame.

also please it currently gives pixel measurements can i change this to mm cm?

i have attached the vi so pls help

thank you

[DanBrowne]

Hi,

When you say "it only does it for 3 or 4 particles" does that mean that the VI only detects 3 or4 particles in an image regardless of the number of particles actually present? Can you clarify this point?

Regards,

Dan
National Instruments UK

[farhan]

hi,

sorry my mistake - it sees all the particles but the particle analysis only gives the area of seeds in the frame. they should bea way to store the previous particle area.

it will be clear what i am trying to do when you open the vi. i simply want the area of all the particles that pass through the camera system and put them in their appropriate size range.

for example all the particles from 200-400 pixels. the final value can be shown in a table or just a variable.

thankyou 

[DanBrowne]

Hi,

Sorry for the delay.

A shift register should allow you to keep the previous iteration's area values when you move to the next iteration.

Regards,

Dan

[farhan]

hi,

but currently the particle analysis only allows a certain number of particle area to be stored. if you look at the particle analysis report

it only counts a certian number of particles. please have a look at the vi which will give you a better idea.

thanks