What is the difference this 2 examples of photos? Use function IMAQ detect circles to detect the GREEN button.

Hi all

Please refer to the attached 2 pictures, they are similar, just the size is defferent. (pass PNG, 5478 pass. PNG).

But now I try to use IMAQ detect circles to catch the GREEN button. For the PNG pass, it works very well, but for another example, it is still does not detect this button.

I also try to change the curve settings and note that entry, but still no. Another way, I also try to use function IMAQ find circles , but the result is worse that IMAQ detect circles, so give up.

The code is detect the circles.png, copy of block diagram.

So what is the root cause? Thanks for help.

Hi colinzhang,

The extraction of curve so it uniform mode, you can get the result.

-Suggestion, if you want to use the entire image area as KING should get the size of the image, get the rectangle and convert it to the descriptor of KING. (I think this is unnecessary)

-Be careful with the extraction of the plane, u use default color which is the Red plan. In this example, it is fine. but make sure you know what aircraft you are extracting.

s ' Please find vi saved in the 2010 version.

Tags: NI Hardware

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