一. yolov5 v6.0训练模型

官网下载yolov5 v6.0代码
下载官方预训练好的模型
安装yolov5所需要的库文件，requirements.txt在下载好的yolov5源代码中有
```
pip install -r C:\Users\10001540\Downloads\yolov5-6.0\requirements.txt
```
打开yolov5源代码中的detect.py文件，修改模型的位置

运行后可能出现各种错误，可以去参考网上的教程

二.训练好的yolov5模型转tensorrt引擎

去tensorrtx官网下载代码
将tensorrtx下的yolov5中的gen_wts.py复制到yolov5源代码文件夹中
参考yolov5官方说明，将yolov5模型文件yolov5s.pt转换为yolov5s.wts文件
```
python gen_wts.py -w weights/yolov5s.pt -o yolov5s.wts
```

进入tensorrtx下的yolov5文件夹，修改里面的CMakeList.txt，如下：

cmake_minimum_required(VERSION 2.6)project(yolov5) #1
set(OpenCV_DIR "D:\\Program Files\\opencv\\build")  #2
set(OpenCV_INCLUDE_DIRS ${OpenCV_DIR}\\include) #3
set(OpenCV_LIB_DIRS ${OpenCV_DIR}\\x64\\vc15\\lib) #4
set(OpenCV_Debug_LIBS "opencv_world454d.lib") #5
set(OpenCV_Release_LIBS "opencv_world454.lib") #6
set(TRT_DIR "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\TensorRT-8.2.3.0")  #7
set(TRT_INCLUDE_DIRS ${TRT_DIR}\\include) #8
set(TRT_LIB_DIRS ${TRT_DIR}\\lib) #9
set(Dirent_INCLUDE_DIRS "Z:\\code\\dirent-master\\include") #10add_definitions(-std=c++11)
add_definitions(-DAPI_EXPORTS)option(CUDA_USE_STATIC_CUDA_RUNTIME OFF)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_BUILD_TYPE Debug)set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads)# setup CUDA
find_package(CUDA REQUIRED)
message(STATUS "    libraries: ${CUDA_LIBRARIES}")
message(STATUS "    include path: ${CUDA_INCLUDE_DIRS}")include_directories(${CUDA_INCLUDE_DIRS})####
enable_language(CUDA)  # add this line, then no need to setup cuda path in vs
####
include_directories(${PROJECT_SOURCE_DIR}/include) #11
include_directories(${TRT_INCLUDE_DIRS}) #12
link_directories(${TRT_LIB_DIRS}) #13
include_directories(${OpenCV_INCLUDE_DIRS}) #14
link_directories(${OpenCV_LIB_DIRS}) #15
include_directories(${Dirent_INCLUDE_DIRS}) #16# -D_MWAITXINTRIN_H_INCLUDED for solving error: identifier "__builtin_ia32_mwaitx" is undefined
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Ofast -D_MWAITXINTRIN_H_INCLUDED")# setup opencv
find_package(OpenCV QUIETNO_MODULENO_DEFAULT_PATHNO_CMAKE_PATHNO_CMAKE_ENVIRONMENT_PATHNO_SYSTEM_ENVIRONMENT_PATHNO_CMAKE_PACKAGE_REGISTRYNO_CMAKE_BUILDS_PATHNO_CMAKE_SYSTEM_PATHNO_CMAKE_SYSTEM_PACKAGE_REGISTRY
)message(STATUS "OpenCV library status:")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    lib path: ${OpenCV_LIB_DIRS}")
message(STATUS "    Debug libraries: ${OpenCV_Debug_LIBS}")
message(STATUS "    Release libraries: ${OpenCV_Release_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")add_executable(yolov5 ${PROJECT_SOURCE_DIR}/yolov5.cpp ${PROJECT_SOURCE_DIR}/common.hpp ${PROJECT_SOURCE_DIR}/yololayer.cu ${PROJECT_SOURCE_DIR}/yololayer.h ${PROJECT_SOURCE_DIR}/preprocess.cu ${PROJECT_SOURCE_DIR}/preprocess.h)   #17target_link_libraries(yolov5 "nvinfer" "nvinfer_plugin") #18
target_link_libraries(yolov5 debug ${OpenCV_Debug_LIBS}) #19
target_link_libraries(yolov5 optimized ${OpenCV_Release_LIBS}) #20
target_link_libraries(yolov5 ${CUDA_LIBRARIES}) #21
target_link_libraries(yolov5 Threads::Threads)  if(NOT DEFINED CMAKE_CUDA_ARCHITECTURES)
set(CMAKE_CUDA_ARCHITECTURES 70 75 80 86)
endif(NOT DEFINED CMAKE_CUDA_ARCHITECTURES)