我已经使用https://help.ubuntu.com/community/OpenCV中的说明安装了OpenCV
$ sudo su
$ sudo apt-get install build-essential
$ sudo apt-get install libavformat-dev
$ sudo apt-get install ffmpeg
$ sudo apt-get install libcv2.3 libcvaux2.3 libhighgui2.3 python-opencv opencv-doc libcv-dev libcvaux-dev libhighgui-dev
现在，当我执行“pkg-config --cflags --libs opencv”时，我收到此错误：
Package opencv was not found in the pkg-config search path.
Perhaps you should add the directory containing `opencv.pc'
to the PKG_CONFIG_PATH environment variable
No package 'opencv' found
我该如何解决这个问题？
------- -------更新
好的，我想出了如何解决问题......
我创建了一个名为“opencv.pc”的文件并将其复制到“/ usr / local / lib / pkgconfig”然后我将这两行添加到“.bashrc”：
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH
而已！现在一切都好。
该文件的内容是：
prefix=/usr
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib
Name: opencv
Description: The opencv library
Version: 2.x.x
Cflags: -I${includedir}/opencv -I${includedir}/opencv2
Libs: -L${libdir} -lopencv_calib3d -lopencv_imgproc -lopencv_contrib -lopencv_legacy -lopencv_core -lopencv_ml -lopencv_features2d -lopencv_objdetect -lopencv_flann -lopencv_video -lopencv_highgui
更新 - 2014年
似乎ubuntu社区已完成安装openCV的文档，您现在要做的就是从https://github.com/jayrambhia/Install-OpenCV/blob/master/Ubuntu/opencv_latest.sh下载安装脚本并执行它。
从你的问题我猜你正在使用Ubuntu（或衍生物）。如果您使用：
apt-file search opencv.pc
然后你看到你必须安装libopencv-dev。
在你这样做之后，pkg-config --cflags opencv和pkg-config --libs opencv应该按预期工作。
看来ubuntu社区已经完成了安装openCV的文档，
所以你现在要做的就是从here下载安装脚本并执行它。
别忘了让它可执行：
chmod +x opencv_latest.sh
然后
./opencv_latest.sh
嗨首先，我希望您使用'Synaptic Package Manager'。你只需要转到ubuntu软件中心并搜索synaptic包管理器。这就是你需要的所有软件包都可以在这里轻松获得。其次，它会自动配置您的所有路径。现在安装它然后在那里搜索opencv软件包，如果你发现带有绿色框然后安装的软件包，否则软件包不在正确的位置，所以你需要重新安装它，但这次是从软件包管理器。如果已安装，那么您只能这样做，您只需要使用opencv（包含OpenCVConfig.cmake文件）的路径填充OpenCV_DIR变量
export OpenCV_DIR=<path_of_opencv>
尝试在Debian 9.8上编译Go包时出现了同样的错误：
# pkg-config --cflags -- libssl libcrypto
Package libssl was not found in the pkg-config search path.
Perhaps you should add the directory containing `libssl.pc'
问题是pkg-config在.pc文件中搜索包元信息。这些文件来自dev包。所以，即使我安装了libssl，我仍然得到错误。它通过运行解决：
sudo apt-get install libssl-dev
$ ./configure --enable-libopencv
ERROR: opencv not found using pkg-config
$ cat /usr/lib64/pkgconfig/opencv.pc
# Package Information for pkg-config
prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib64
includedir_old=${prefix}/include/opencv
includedir_new=${prefix}/include
Name: OpenCV
Description: Open Source Computer Vision Library
Version: 3.1.0
Libs: -L${exec_prefix}/lib64 -lopencv_shape -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_cvv -lopencv_dnn -lopencv_dpm -lopencv_fuzzy -lopencv_hdf -lopencv_line_descriptor -lopencv_optflow -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_rgbd -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_face -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core
Libs.private: -L/usr/lib64 -lQt5Test -lQt5Concurrent -lQt5OpenGL -L/lib64 -lwebp -lpng -ltiff -ljasper -ljpeg -lImath -lIlmImf -lIex -lHalf -lIlmThread -lgdal -lgstvideo-1.0 -lgstapp-1.0 -lgstbase-1.0 -lgstriff-1.0 -lgstpbutils-1.0 -lgstreamer-1.0 -lucil -lunicap -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lfontconfig -lfreetype -lglib-2.0 -ldc1394 -lv4l1 -lv4l2 -lgphoto2 -lgphoto2_port -lexif -lQt5Core -lQt5Gui -lQt5Widgets -lhdf5_hl -lhdf5 -lz -ldl -lm -ltesseract -llept -lpthread -lrt -lGLU -lGL
Cflags: -I${includedir_old} -I${includedir_new}
$ pkg-config --cflags --libs opencv
-I/usr/include/opencv -lopencv_shape -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_cvv -lopencv_dnn -lopencv_dpm -lopencv_fuzzy -lopencv_hdf -lopencv_line_descriptor -lopencv_optflow -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_rgbd -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_face -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core
$ uname -a
Linux fedora-23-x64 4.8.13-100.fc23.x86_64 #1 SMP Fri Dec 9 14:51:40 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux