imaq learn pattern 2 angle

[martinboecskoer]

hello,

i need advice about how the imaq learn pattern 2 computes the angle.

the problem i got is following: we use the imaq learn pattern 2 to get compare the angle between 5 pictures form a video. the first one is the reference pic (=0° angle). everything seems to work fine, but the angle changes with the size of the template and where it is cut out from.

i thought that this may be a problem with the pic. a lot of information in the picture stays the same only a little is different (just take a look at the attached pictures). can anyone please tell me how the imaq learn pattern calculates the angel, if it is the tool to go for to solve the problem, or should i try to get the angle from somewhere else?

Same picture - different size= different angle. Same picture - cut out a couple of pixels away = different ange?!?

   

thanx a lot

martin

[Ken_Tobler]

Dear Sir,

I tried a match pattern 2 after the IMAQ Learn pattern 2 and could match both images (Angle 0)
Which version of LV and Vision do you use?

Do you also compute the angle via the Match Pattern 2.vi?

Regards
Ken