it seems you reference the lib of libtorch and that makes this error ,but i am not sure how to fix this issue ,can you give me some help about this and i wil appreciate it. CMake Error at /home/suning/libtorch/share/cmake/Caffe2/public/utils.cmake:16 (add_library): add_library cannot create target "torch_library" because another target with the same name already exists. The existing target is an interface library created in source directory "/home/suning/libtorch-yolov3-deepsort-master/detection". See documentation for policy CMP0002 for more details.

请问：你的libtorch是如何安装的，我直接使用编译好的库，会报错“add_library cannot create target "caffe2_library" because another target with the same name already exists”

i downloaded all the and libs in Readme.txt , but i do not know how to build the project using cmake , what command should i write in command line ??? P.S. i am new to cmake and all these stuff

@weixu000

Is weights/ckpt.bin in Extractor.cpp same ckpt.t7 from https://drive.google.com/drive/folders/1xhG0kRH1EX5B9_Iz8gQJb7UNnn_riXi6 ?

When I rename to .bin and copy it in the weights directory I get a segmentation fault.

I am using Ubuntu 18.04 x86-64

Thanks so much

When I test your repo i found that in line 72 of nn_matching.h have a trouble. when you call nn_cosine_distance if for loop (line 55), when i==0, time taken by .cpu() was >22000 micro second, but with other index, it took only 10-20 microseconds. If there is the way decrease that one, performance will increase dramatically.

In file included from /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:5:0: /home/libtorch-yolov3-deepsort/detection/src/letterbox.h: In function ‘std::array<long int, 2ul> letterbox_dim(c10::IntArrayRef, c10::IntArrayRef)’: /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:11:22: error: missing template arguments before ‘{’ token return std::array{int64_t(img_h * s), int64_t(img_w * s)}; ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:11:22: error: expected ‘;’ before ‘{’ token /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:11:61: error: expected ‘;’ before ‘}’ token return std::array{int64_t(img_h * s), int64_t(img_w * s)}; ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h: In function ‘cv::Mat letterbox_img(const cv::Mat&, c10::IntArrayRef)’: /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:16:9: error: expected unqualified-id before ‘[’ token auto[new_h, new_w] = letterbox_dim({img.rows, img.cols}, box); ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:16:60: error: expected primary-expression before ‘,’ token auto[new_h, new_w] = letterbox_dim({img.rows, img.cols}, box); ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:21:30: error: ‘new_h’ was not declared in this scope out({int((h - new_h) / 2), int((h - new_h) / 2 + new_h)}, ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:22:30: error: ‘new_w’ was not declared in this scope {int((w - new_w) / 2), int((w - new_w) / 2 + new_w)}), ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:22:72: error: no match for call to ‘(cv::Mat) (, )’ {int((w - new_w) / 2), int((w - new_w) / 2 + new_w)}), ^ In file included from /usr/local/include/opencv2/core/mat.hpp:3699:0, from /usr/local/include/opencv2/core.hpp:59, from /usr/local/include/opencv2/opencv.hpp:52, from /home/libtorch-yolov3-deepsort/detection/include/Detector.h:6, from /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:3: /usr/local/include/opencv2/core/mat.inl.hpp:904:5: note: candidate: cv::Mat cv::Mat::operator()(cv::Range, cv::Range) const Mat Mat::operator()( Range rowRange, Range colRange ) const /usr/local/include/opencv2/core/mat.inl.hpp:904:5: note: no known conversion for argument 1 from ‘’ to ‘cv::Range’ /usr/local/include/opencv2/core/mat.inl.hpp:910:5: note: candidate: cv::Mat cv::Mat::operator()(const Rect&) const Mat Mat::operator()( const Rect& roi ) const ^ /usr/local/include/opencv2/core/mat.inl.hpp:910:5: note: candidate expects 1 argument, 2 provided /usr/local/include/opencv2/core/mat.inl.hpp:916:5: note: candidate: cv::Mat cv::Mat::operator()(const cv::Range*) const Mat Mat::operator()(const Range* ranges) const ^ /usr/local/include/opencv2/core/mat.inl.hpp:916:5: note: candidate expects 1 argument, 2 provided /usr/local/include/opencv2/core/mat.inl.hpp:922:5: note: candidate: cv::Mat cv::Mat::operator()(const std::vectorcv::Range&) const Mat Mat::operator()(const std::vector& ranges) const ^ /usr/local/include/opencv2/core/mat.inl.hpp:922:5: note: candidate expects 1 argument, 2 provided In file included from /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:5:0: /home/libtorch-yolov3-deepsort/detection/src/letterbox.h: In function ‘void inv_letterbox_bbox(at::Tensor, c10::IntArrayRef, c10::IntArrayRef)’: /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:31:9: error: expected unqualified-id before ‘[’ token auto[new_h, new_w] = letterbox_dim(img_dim, box_dim); ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:33:34: error: ‘new_w’ was not declared in this scope bbox.select(1, 0).add(-(w - new_w) / 2).mul(1.0f * img_w / new_w); ^ /home/libtorch-yolov3-deepsort/detection/src/letterbox.h:36:34: error: ‘new_h’ was not declared in this scope bbox.select(1, 1).add_(-(h - new_h) / 2).mul_(1.0f * img_h / new_h); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp: In function ‘auto {anonymous}::threshold_confidence(at::Tensor, float)’: /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:14:13: error: expected unqualified-id before ‘[’ token auto[max_cls_score, max_cls] = pred.slice(1, 5).max(1); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:15:9: error: ‘max_cls_score’ was not declared in this scope max_cls_score *= pred.select(1, 4); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:22:32: error: ‘max_cls’ was not declared in this scope max_cls.index_select(0, index), ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp: In member function ‘std::vector<cv::Rect_ > Detector::detect(cv::Mat)’: /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:87:9: error: expected unqualified-id before ‘[’ token auto[bbox, cls, scr] = threshold_confidence(prediction, confidence_threshold); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:88:5: error: ‘bbox’ was not declared in this scope bbox = bbox.cpu(); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:89:5: error: ‘cls’ was not declared in this scope cls = cls.cpu(); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:90:5: error: ‘scr’ was not declared in this scope scr = scr.cpu(); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:99:35: error: expected primary-expression before ‘float’ auto bbox_acc = bbox.accessor<float, 2>(); ^ /home/libtorch-yolov3-deepsort/detection/src/Detector.cpp:100:33: error: expected primary-expression before ‘float’ auto scr_acc = scr.accessor<float, 1>(); ^ detection/CMakeFiles/detection.dir/build.make:89: recipe for target 'detection/CMakeFiles/detection.dir/src/Detector.cpp.o' failed make[2]: *** [detection/CMakeFiles/detection.dir/src/Detector.cpp.o] Error 1 CMakeFiles/Makefile2:151: recipe for target 'detection/CMakeFiles/detection.dir/all' failed make[1]: *** [detection/CMakeFiles/detection.dir/all] Error 2 Makefile:90: recipe for target 'all' failed make: *** [all] Error 2

Hello all,

I need a bit of help with building the repository. My specifications are as follows:

Ubuntu 18.04 libtorch v.1.0.0 OpenCV 3.2

I cloned the repo, created a build folder and used cmake .. , which went well. When I use make, it gives me the following error: cmake .. -- Configuring done -- Generating done -- Build files have been written to: /home/andik/Schreibtisch/ML/libtorch-yolov3-deepsort/build andik@andik-VirtualBox:~/Schreibtisch/ML/libtorch-yolov3-deepsort/build$ make ..andik@andik-VirtualBox:~/Schreibtisch/ML/libtorch-yolov3-deepsort/build$ make Scanning dependencies of target detection [ 5%] Building CXX object detection/CMakeFiles/detection.dir/src/Darknet.cpp.o /home/andik/Schreibtisch/ML/libtorch-yolov3-deepsort/detection/src/Darknet.cpp:63:53: error: ‘torch::IntArrayRef’ has not been declared torch::Tensor forward(torch::Tensor prediction, torch::IntArrayRef inp_dim) { ^~~~~ /home/andik/Schreibtisch/ML/libtorch-yolov3-deepsort/detection/src/Darknet.cpp: In member function ‘at::Tensor DetectionLayerImpl::forward(at::Tensor, int)’: /home/andik/Schreibtisch/ML/libtorch-yolov3-deepsort/detection/src/Darknet.cpp:72:38: error: invalid types ‘int[int]’ for array subscript int64_t stride[] = {inp_dim[0] / grid_size[0], inp_dim[1] / grid_size[1]}; ^ /home/andik/Schreibtisch/ML/libtorch-yolov3-deepsort/detection/src/Darknet.cpp:72:65: error: invalid types ‘int[int]’ for array subscript int64_t stride[] = {inp_dim[0] / grid_size[0], inp_dim[1] / grid_size[1]}; ^ detection/CMakeFiles/detection.dir/build.make:62: recipe for target 'detection/CMakeFiles/detection.dir/src/Darknet.cpp.o' failed make[2]: *** [detection/CMakeFiles/detection.dir/src/Darknet.cpp.o] Error 1 CMakeFiles/Makefile2:85: recipe for target 'detection/CMakeFiles/detection.dir/all' failed make[1]: *** [detection/CMakeFiles/detection.dir/all] Error 2 Makefile:83: recipe for target 'all' failed make: *** [all] Error 2

Has anyone experienced the same error? Best regards Andi

首先感谢@weixu000做的很棒的工作！ 我用yolov4+TensorRT+torch复现了这个项目，但我发现一个问题，在进行跟踪时，有时候tracker似乎并没有跟踪到目标。但是detector的检测是检测到的，并且置信度还挺高。而且看传给tracker的参数，也只是将rect传过去就可以，与置信度并无关系。 所以我想请教一下，应该如何调整跟踪参数，使得跟踪更加准确并且不会丢呢？ 我看deepsort.cpp对iou_mat有一些阈值，是不是要调整这里？ 麻烦您方便的时候给与解答 再次感谢@weixu000 ！