pattern matching

[GiBo]

i'm tryng to write a VI that search and track objects (cells) in a sequence of images, i don't know how to select differents ROI in the first frame and then to refresh the ROI every 10 frames because the pattern of the cells change a lot during the experiment.

My start point is the Pattern_Matching_Example.vi i've found on this site.

thanks a lot
paolo

[JR_A.]

It sounds like what you want to adjust your ROI's position programatically. This can be done a couple of ways. You can do it manually by changing the values for the ROI descriptor cluster to change it's position. Or you could use the Rectangle to ROI to create a new ROI descriptor. Another approach which might be helpful if you have multiple ROI's would be to define a coordinate system and base your ROI's off of that system. A good example of this is included in the Vision examples that ship with it. Look at the Battery Clamp.vi example. Hope this was helpful.

JR A.
Application Engineer
National Instruments