Hello,
I wrote a code that parses the rgb stream from the kinectv2 and i'm trying to recognize the tags but it does not work.
I also tried to resize the frame to 640x480 but nothing changed.
i'm not passing any parameter to the command line.
I think the detector is running normally because sometimes it recognizes something random.
Do you have an idea of what it might be the problem?
Thanks

hi,professor:
this project is alsome, but doesn't update for a long time, apriltag 3 has evolved, it has better detection algorithm that more fast and accurate, but it dosen't use C++ and it just run on CPU,
so , can please let this project going on？ make it better!
PLEASE!

I'm patching now and creating a pull request

i have installed it and I tried to run the demo camtest. But it shows:

edison@edison-Vostro-3668:~/kinect/apriltags-cpp/build$ ./camtest
family.minimumHammingDistance = 11
family.errorRecoveryBits = 5
Set camera to resolution: 0x0
no frames!

there is no window for detecting, can you please help me? thank you

The headers of the source files say this code is distributed under GPL, but the original apriltags-cpp was LGPL v2. Is this source code GPL, LGPL, or something else? The complete text of the license should appear at the top of every source file, and in the README.

After running ./camtest. I can see the apriltags have been detected by have red boxes. Now, how to get the pose information（x,y,z,w) of the apriltags?
please give me some helps, thank you

Hello I'm new to april tags and need a bit of help. Using your repository I've been able to compile as mentioned, but when i try to write a small snippet for another application (where i need to extract the center of the tag, I am facing a small issue and need `advise.The following is the code i've included all header files accordingly.

`using namespace std;
using namespace AprilTags;
using namespace cv;

int main(int argc, char* argv[])
{
VideoCapture cap(1); // open the default camera
if(!cap.isOpened()) // check if we succeeded
return -1;

namedWindow("view",1);
TagDetector detector(AprilTags::tagCodes36h11);

for(;;)
{
    Mat frame;
    cap >> frame; // get a new frame from camera
    std::vector< TagDetection> detector.extractTags(frame);
     imshow("view", frame);
    if(waitKey(30) >= 0) break;
}
// the camera will be deinitialized automatically in VideoCapture destructor
return 0;

}`

and am getting the following error which i am not able to solve.

In function main': /home/shashank/catkin_ws/src/apriltags-cpp/src/my_tag.cpp:39: undefined reference to AprilTags::TagDetector::extractTags(cv::Mat const&)'
CMakeFiles/my_tag.dir/my_tag.cpp.o: In function AprilTags::TagDetector::TagDetector(AprilTags::TagCodes const&)': /usr/local/include/AprilTags/TagDetector.h:21: undefined reference to AprilTags::TagFamily::TagFamily(AprilTags::TagCodes const&)'
collect2: error: ld returned 1 exit status
make[2]: *** [my_tag] Error 1
make[1]: *** [src/CMakeFiles/my_tag.dir/all] Error 2
make: *** [all] Error 2

could you plz help me on this.
Thnk you

At first, i appreciate you sincerely.just i have some question about apriltag that how dose it calcuate the distance between the tag and camera in 3D? in other words，how to know the tag`s pose?Its x,y,z in coordinate system.

It would be great to have an install command in the CMakeLists that puts the library in the standard lib directory (i.e. make install works)

When compiling using cuda-enabled OpenCV, I get the following:

/usr/bin/ld: cannot find -lcufft
/usr/bin/ld: cannot find -lnpps
/usr/bin/ld: cannot find -lnppi
/usr/bin/ld: cannot find -lnppc

I solved this on my own machine by adding this at line 18 to CMakeLists.txt:

  link_directories(/usr/local/cuda-7.0/lib64)

Ideally, the CMakeLists.txt file should deal with this automatically by detecting if CUDA is enabled and linking against it if it is.

how to solve this problem as the follow photo?