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Please help,
I know i should not ask a question.
But I really feel sick with it.
**when I try to build Opencv3.1 with Opencv_Contrib, the module-xfeatures2d is always unavailable.**
Did I miss…
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Hey guys I have been trying to get Csparse to work with g2o and I am not sure exactly what to do
when I use this line
```
typedef g2o::BlockSolver_6_3 BlockSolverType; // bA solver
typedef g2o::L…
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##### System information (version)
- OpenCV => 4.6
- Operating System / Platform => Windows 64 Bit
- Compiler => Visual Studio 2022
##### Detailed description
It looks like https://github.com/…
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Errors trying to build emgucv Cuda on ubuntu LTS latest OS.
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### Xmake 版本
2.9.4
### 操作系统版本和架构
Ubuntu18.04
### 描述问题
我现在有demo需要链接几个动态库，但是该段代码中并未直接使用到这几个库中的代码，所以导致最终并没有链接上， 尝试添加了add_ldflags("-Wl,--no-as-needed")，但是看编译命令，xmake把他加到了最后面 也就并不能正常生效。
![image](http…
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OpenCV => 4.6
Operating System / Platform => Windows
It was too slow to compute DNN with cpu. So I built and checked all of these cmake options to use the GPU.
```
net.setPreferableBackend(cv2.d…
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Bump to opencv 4 and optimise for x86, raspberry and tegra platforms
fnoop updated
4 years ago
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### System Information
OpenCV version: 4.9.0
Operating System / Platform: Windows 11
CMake
### Detailed description
When building OpenCV with NVIDIA CUDA support using CMake, this error happens:
…
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Os：Windows11
Cpu：AMD 5800h
Gpu：RTX3070
Cuda Version：11.1
Cmake succeeded, but when compiling, the following bug appeared:
5>CUDACOMPILE : nvcc warning : The 'compute_35', 'compute_37', 'compute…
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Show error when try to make
```
gcc -Iinclude/ -Isrc/ -DOPENCV `pkg-config --cflags opencv` -Wall -Wno-unknown-pragmas -Wfatal-```
errors -fPIC -Ofast -DOPENCV -c ./src/gemm.c -o obj/gemm.o
In fi…