Regarding the establishment of visp environment

[mike55688]

Hello
I did this step while executing the installation tutorial above.
＝>make -j$(nproc)

The following problem occurs during compilation
my version Python 3.10.12

Processing /home/mk/visp-ws/visp/modules/python/generator
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Building wheels for collected packages: UNKNOWN
  Building wheel for UNKNOWN (pyproject.toml) ... done
  Created wheel for UNKNOWN: filename=UNKNOWN-0.0.0-py3-none-any.whl size=961 sha256=35a03ee67864f02ec00014418709d660789728292315c95388c1b92a2c9d0487
  Stored in directory: /tmp/pip-ephem-wheel-cache-jlxek33z/wheels/26/a0/03/bf18d0eff6b669a761464250d51908a16b45c327dc034ffe04
Successfully built UNKNOWN
Installing collected packages: UNKNOWN
  Attempting uninstall: UNKNOWN
    Found existing installation: UNKNOWN 0.0.0
    Uninstalling UNKNOWN-0.0.0:
      Successfully uninstalled UNKNOWN-0.0.0
Successfully installed UNKNOWN-0.0.0
/usr/bin/python3.10: Error while finding module specification for 'visp_python_bindgen.generator' (ModuleNotFoundError: No module named 'visp_python_bindgen')
make[2]: *** [modules/python/CMakeFiles/visp_python_bindings_generator_run.dir/build.make:141: modules/python/bindings/src/main.cpp] Error 1
make[1]: *** [CMakeFiles/Makefile2:25395: modules/python/CMakeFiles/visp_python_bindings_generator_run.dir/all] Error 2
make: *** [Makefile:146: all] Error 2

[fspindle]

If you are willing to build Python bindings you should for now use the code from this PR #1316 . The how to doc is available in this PR #1312.

If you are not interested in python bindings, just disable them using cmake ../visp -DBUILD_PYTHON_BINDINGS=OFF.

[mike55688]

Hello
Thank you for the solution you provided.

I used the second method you provided => cmake ../visp -DBUILD_PYTHON_BINDINGS=OFF
I would like to ask if there are any problems if you don't use python binding?

[fspindle]

There is no problem to disable Python bindings. You will be able to use ViSP libraries as any other C++ software.

[mike55688]

Hello
I followed the teaching: deep learning target detection to the sixth step
$ cmake ..
-DCMAKE_BUILD_TYPE=RELEASE
-DCMAKE_INSTALL_PREFIX=/usr
-DCMAKE_INSTALL_LIBDIR=lib
-DWITH_CUDA=ON
-DWITH_CUDNN=ON
-DOPENCV_DNN_CUDA=ON
-DENABLE_FAST_MATH=1
-DCUDA_FAST_MATH=1
-DCUDA_ARCH_BIN=${GPU_CAPABILITIES}
-DWITH_CUBLAS=1
-DOPENCV_EXTRA_MODULES_PATH=${HOME}/visp_ws/3rdparty/opencv_contrib/modules
-DBUILD_PERF_TESTS=Off
-DBUILD_TESTS=OFF
-DBUILD_EXAMPLES=OFF
-DBUILD_opencv_apps=Close
-DBUILD_opencv_java_bindings_generator=off
-DBUILD_opencv_js=off

It creates the following problem
CMake error: 274 (message) at cmake/OpenCVModule.cmake:
Module not found:
/home/mk/visp_ws/visp/3rdparty/opencv_contrib/modules
Call stacking (most recent call first):
cmake/OpenCVModule.cmake:356 (_glob_locations)
cmake/OpenCVModule.cmake:385 (ocv_glob_modules)
CMakeLists.txt: 951 (ocv_register_modules)

CMake error (message) at module/core/CMakeLists.txt:53:
CUDA: OpenCV needs to enable the "cudev" module from "opencv_contrib"
Repository: https://github.com/opencv/opencv_contrib

I would like to ask how I should solve the above problem

[fspindle]

It seems that ${HOME}/visp_ws/3rdparty/opencv_contrib/modules doesn't exist.

Should be tested with

$ ls ${HOME}/visp_ws/3rdparty/opencv_contrib/modules

and adapted according to the path where you cloned the repo

[mike55688]

Hello
Thank you I have changed the path and compiled successfully.

I'm currently following this step of the tutorial
8.Compile and install OpenCV. On a Debian distribution, you would run:
$ make -j$(nproc)

The following error occurred when it was compiled halfway through

CMake Error at cuda_compile_1_generated_gpu_mat.cu.o.RELEASE.cmake:222 (message):
Error generating
/home/mk/visp-ws/visp/3rdparty/opencv/build/modules/core/CMakeFiles/cuda_compile_1.dir/src/cuda/./cuda_compile_1_generated_gpu_mat.cu.o

I would like to ask you how I can solve this problem.

[mike55688]

似乎${HOME}/visp_ws/3rdparty/opencv_contrib/modules不存在。

應該測試

$ ls ${HOME}/visp_ws/3rdparty/opencv_contrib/modules

並根據您克隆儲存庫的路徑進行調整

Sorry, does this need to be modified? GPU_CAPABILITIES

[fspindle]

These are OpenCV issues. Open an issue there.
To build OpenCV with GPU capabilities, your computer needs a GPU board...

[mike55688]

Hello
I have completed the compilation and installation of OpenCV in the seventh step of deep learning target detection. The last step is
=>When using categories, if you want to benefit from GPU acceleration, vpDetectorDNNOpenCV please call the method vpDetectorDNNOpenCV::setPreferableBackend() first, and then perform inference: vpDetectorDNNOpenCV::setPreferableTarget()

Sorry, I don't quite understand how to do this step, or do I not need to perform this step?

[mike55688]

Hello
I am executing Tutorial: Deep learning object detection

I am testing whether yolov7 can run. Because MegaPose uses yolov7, I need to run the yolov7 project in the Deep learning object detection tutorial first to make sure that my yolov7 is OK. But I currently encounter the following problem. I want to Please tell me how to solve this problem
------------Version--------------
opencv :4.5.4
python: 3.8.18
cuda:11.3
cuDNN:8.5

----------problem--------------
(pytorch-tutorial) mk@mk-ROG-Flow-X16-GV601VI-GV601VI:~/visp-ws/visp-build/tutorial/detection/dnn$ ./tutorial-dnn-object-detection-live --input-json ./default_yolov7.json
Video device : 0
Label file (optional): None
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (1100) open OpenCV | GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
[ERROR:0] global ./modules/dnn/src/onnx/onnx_importer.cpp (718) handleNode DNN/ONNX: ERROR during processing node with 1 inputs and 1 outputs: [Identity]:(onnx::Reshape_395)
terminate called after throwing an instance of 'cv::Exception'
what(): OpenCV(4.5.4) ./modules/dnn/src/onnx/onnx_importer.cpp:739: error: (-2:Unspecified error) in function 'handleNode'

Node [Identity]:(onnx::Reshape_395) parse error: OpenCV(4.5.4) ./modules/dnn/src/dnn.cpp:5653: error: (-215:Assertion failed) inputs.size() in function 'getMemoryShapes'

Aborted (core dumped)