apriltag

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Hi,some questions about Homography and extrinsics estimation.

2

Hi,Thanks for your great work! I have some questions when I read your article "AprilTag: A robust and flexible visual fiducial system". In Setion " Homography and extrinsics estimation", why...

Zhang-Qinghui

Error, more than one new minima found

10

Regarding the `fprintf` in [apriltag_pose.c:435](https://github.com/AprilRobotics/apriltag/blob/3.1.1/apriltag_pose.c#L435) that prints: > Error, more than one new minima found How is a user of your library supposed to react to this message? Is this...

allsey87

When running multiple iterations we want to focus the profiling time on the core algorithm. This change separates image loading from detection. Each iteration is the array of loaded images....

jrepp

Testing framework discussion

1

I'd like to share a small project I did recently to add automated testing and code coverage to an old GitHub project. In this case the author had archived their...

jrepp

Lower FPS NVIDIA Jetson Nano

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One of the python wrappers of the April tag library that I am using for this benchmark test. [https://github.com/duckietown/lib-dt-apriltags](https://github.com/duckietown/lib-dt-apriltags) Intel NUC i3 CPU Results: 1. 30 FPS Apriltag not in...

maharshi114

[Bug] Visual Studio detects stack corruption in apriltag.c homography_compute2

5

Visual Studio in Debug is telling me that the stack is getting corrupted in apriltag.c in homography_compute2(). See lines 435, 436. ` double max_val = 0;` ` int max_val_idx =...

ScottJohnson2718

Apriltag Built in Pose vastly superior to SolvePnp?

1

I did some tests and here is some basic python code using dt_apriltags in python. I believe the solvepnp to be equivalent eg uses the center of the tag and...

henryjliu

Reuse p and R memory from params in apriltag_pose

7

Hi, I want to update the Julia wrapper for apriltags and I have this change that fixes an issue. Memory not owned by the function is freed and new memory...

Affie

Resolve warnings; signed unsigned comparison

1

Resolved comparison between signed and unsigned.

csaba-luxonis

Estimating pose of Apriltags via Spherical/360 camera

3

I was wondering if it's possible to detect Apriltags using stitched images from spherical/360 cameras, as the camera intrinsic parameters are of different nature. Example image from 360 camera: 

swapnilsayansaha