The main issue is that of white on white which I can’t seem to get past other than extreme changes to the color as described in an earlier post.  Probably, if that turns out to be a thing that would just be applied if I couldn’t see any posts and only if I believed that… Continue reading My Attempt

I’ve found two methods for breaking camouflage (from this paper) 1.  Multiple Camouflage Breaking by C0-Occurrence and Canny 2. Convexity-based Visual Camouflage Breaking So, I’m starting to hope we really don’t need this… CloudSight doesn’t even work given the images that the Canny paper (1) can deal with.  So, CloudSight must not be too cutting… Continue reading Breaking Camouflage

The next step would be to look into the structural analysis in opencv and convexity defects… Nevermind…. that is after you have the points do you do this.  I need the points.  It might be useful for identifying hands or fingers, but don’t need it for goal posts.

The NUbots goal detection code uses something called RANSAC.  I wonder if they have tried their algorithm on a white background yet…  It wouldn’t seems so since they are still using a LUT which I don’t think will work with white on white.  Of course this might be their old code from last year.

So, I just had to play around with the colors of the picture that Canny couldn’t detect (and still can’t) but now there is a distinct green color for the white “goal post”!  That could then be id’ed by blob detection which we have now.   However, how to do this programmatically is beyond me!… Continue reading Breaking Countershading

So, I grabbed some images from robocup 2014 that we took of the goal with the netting.  One has no people behind it and the other had people behind it.  I ran both Canny and Hough on it to see if the netting would stand out. Canny with people behind the net: Canny with no… Continue reading Goal net

As you probably can’t see is the fact that I have placed a white pvc pipe in an orange vice grip and put in front of a white background.  I tried running the image through opencv’s HoughLinesP (image below) and Canny and neither can extract the pipe.  However, I’m not surprised as when I zoom… Continue reading White Goal Post Experiment

I think that I might want to try out Canny’s edge detection algorithm to identify the goal posts on the negative of the flood filled image (meaning remove the grass and ball).  I think the main problem will be determining which lines are the goal posts.  Mainly because the robots don’t always see the entire… Continue reading Canny Edge Detection