Extract individual mask

[aveo]

Hi All,

I have an image which has multiple particles in it. (See attached testimage.png) . I want to extract the mask of each particle individually. I used IMAQ Extract 2.vi for this.(See attched test0.vi). However due to overlap of rectangular coordinates of two particles, I cannot extract individual mask. Please take a look at the VI. I have explained the problem in much details as comments in it.

Any suggestions to achieve the result I am looking for? 

Thank You.

Regards

Aveo

[BruceAmmons]

Use IMAQ Label to give each particle a unique intensity value.  After you extract each particle, use IMAQ Compare to get rid of any other particles in the extracted image.  I think you would have to do one comparison to eliminate any values less than the particle value, then another comparison for the values greater than the particle.

Bruce

[KevinC]

Bruce has an excellent answer. This old post may also be useful to you:

http://forums.ni.com/t5/Machine-Vision/How-to-get-boundary-contour-points/m-p/578177

Following this method, after you use MaskToROI, you can manipulate the ROI then use ROIToMask to generate bitmap images for the particles you wish to keep.

[aveo]

Hi Bruce,

Thank you for the suggestion. I am attaching a vi that uses your approach with a modification. I am using IMAQ label to ROI followed by ROI to mask to get individual mask. 

Also there is a comparison between the results of IMAQ extract and IMAQ label. 

Regards

Aveo