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AprilRobotics / apriltag

AprilTag is a visual fiducial system popular for robotics research.
https://april.eecs.umich.edu/software/apriltag
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Problem with find marker #128

Closed sars-ivan-by closed 3 years ago

sars-ivan-by commented 3 years ago

We are using your AprilTag library. Our beginnings were connected with AprilTag 2, but now we have started porting our application to AprilTag 3. We got some bugs that weren't with the previous version: “WRN: Matrix is singular.”, “Error, more than one new minimum found.”, “malloc(): mismatching next->prev_size (unsorted)”. Also I have question about criteria for error at a distance from camera to marker and degrees of rotation markers. Also we have problem "too many border/line", desirable solve this problem without any quad_contours. If we use divide frame to solve it, we can't find some parameters: distance and rotation`

detector=apriltags3.Detector(quad_decimate=1,decode_sharpening=1) detections = detector.detect(img, estimate_tag_pose=False,camera_params=[fx,fy,cx,cy],tag_size=60)` Also img can be after divided

mkrogius commented 3 years ago

Please post one "github issue" per issue you are having. Also, please include enough information with each issue so that I can debug it, e.g. an image and apriltag command that reproduces each bug.

sars-ivan-by commented 3 years ago

Thank you, i post new "github issue" per issue

mkrogius commented 3 years ago

Thanks