1应用

.net core 在linux中使用  OpenCvSharp4

1引用OpenCvSharp4

2引用ubuntu对应版本的runtime

2异常

System.TypeInitializationException: The type initializer for 'OpenCvSharp.Internal.NativeMethods' threw an exception.
 ---> System.DllNotFoundException: Unable to load shared library 'OpenCvSharpExtern' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libOpenCvSharpExtern: cannot open shared object file: No such file or directory
   at OpenCvSharp.Internal.NativeMethods.redirectError(CvErrorCallback errCallback, IntPtr userdata, IntPtr& prevUserdata)
   at OpenCvSharp.Internal.ExceptionHandler.RegisterExceptionCallback()
   at OpenCvSharp.Internal.NativeMethods.LoadLibraries(IEnumerable`1 additionalPaths)
   at OpenCvSharp.Internal.NativeMethods..cctor()
   --- End of inner exception stack trace ---
   at OpenCvSharp.Internal.NativeMethods.imgcodecs_imread(String fileName, Int32 flags, IntPtr& returnValue)
   at OpenCvSharp.Mat..ctor(String fileName, ImreadModes flags)
 

3处理

 #查看依赖
root@sea-ubuntu:/home/hcrainc# ldd /usr/local/lib/libOpenCvSharpExtern.so
    linux-vdso.so.1 (0x00007ffd57eab000)
    libtesseract.so.4 => not found
    libgtk-x11-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 (0x00007f1cb6a4f000)
    libgdk-x11-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 (0x00007f1cb679a000)
    libcairo.so.2 => /usr/lib/x86_64-linux-gnu/libcairo.so.2 (0x00007f1cb647d000)
---
安装依赖

sudo apt update

sudo apt install libtesseract-dev

如果都不管

1可参考如下                

RUN apt-get update && apt-get install -y \
    apt-utils \
    libgdiplus \
    libc6-dev \
    libgtk2.0-dev \
    libtbb-dev \
    libatlas-base-dev \
    libvorbis-dev \
    libxvidcore-dev \
    libopencore-amrnb-dev \
    libopencore-amrwb-dev \
    libavresample-dev \
    x264 \
    v4l-utils \
    libwebp-dev \
    tesseract-ocr \
    libtesseract-dev \
    libleptonica-dev \
    libtiff-dev \
    libavcodec-dev \
    libavformat-dev \
    libswscale-dev \
    libdc1394-22-dev \
    libxine2-dev \
    libv4l-dev \
    tesseract-ocr