Searching and Matching - Difference between 'Match Pattern' and 'Match Geometric Pattern'?

[TKassis]

I was wondering if someone can explain to me the difference between  'Match Pattern' and 'Match Geometric Pattern' VIs? I'm really not sure which best to use for my application. I'm trying to search/match small spherical particles in a grey video in order to track their speed (I'm doing this after subtracting two subsequent frames to get rid of background motion artifacts).

Which should I use?

Thank you!

[Silver_Shaper · Accepted solution]

Hi TKassis,

1.You may find from this link for the difference between these two,

Pattern Match : http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_match_pattern_3/

Geometric Match : http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_match_geometric_pattern/.

2. I always prefer match pattern because of its execution speed, and incase of geometric pattern match it took lot of time to match your result. You may find in the attached figure for same image with these two algorithm execution time.

[TKassis]

Thank you!

[Silver_Shaper]

Hi TKassis,

Dont forget to mark solution if problem solved.