WSL2+ Ubuntu 20.04 上的 python3.9：如何使用 cv2 显示图像opencv-python 4.4.0.46

如何解决WSL2+ Ubuntu 20.04 上的 python3.9：如何使用 cv2 显示图像opencv-python 4.4.0.46

我在 WSL2+ Ubuntu 20.04 上运行 python3.9。我也安装了 opencv-python 4.4.0.46。

现在，我正在尝试使用 cv2.imshow 来显示图像。但是，WSL 似乎不允许显示，保存可能是选项之一。

我想知道是否有人设法在 cv2 中实现了图像/绘图的显示。如果是，我将不胜感激。

更新： print(cv2.getBuildinformation())的输出：

General configuration for OpenCV 4.4.0 =====================================
  Version control:               4.4.0-dirty

  Platform:
    Timestamp:                   2020-11-03T00:52:03Z
    Host:                        Linux 4.15.0-1077-gcp x86_64
    CMake:                       3.18.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /bin/gmake
    Configuration:               Release

  cpu/HW features:
    Baseline:                    SSE SSE2 SSE3
      requested:                 SSE3
    dispatched code generation:  SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
      requested:                 SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
      SSE4_1 (15 files):         + SSSE3 SSE4_1
      SSE4_2 (1 files):          + SSSE3 SSE4_1 POPCNT SSE4_2
      FP16 (0 files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
      AVX (4 files):             + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
      AVX2 (29 files):           + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
      AVX512_SKX (4 files):      + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX

  C/C++:
    Built as dynamic libs?:      NO
    C++ standard:                11
    C++ Compiler:                /usr/lib/ccache/compilers/c++  (ver 9.3.1)
    C++ flags (Release):         -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/lib/ccache/compilers/cc
    C flags (Release):           -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,--exclude-libs,libippicv.a -Wl,libippiw.a -L/root/ffmpeg_build/lib  -Wl,--gc-sections -Wl,--as-needed
    Linker flags (Debug):        -Wl,--as-needed
    ccache:                      YES
    precompiled headers:         NO
    Extra dependencies:          ade Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent /lib64/libpng.so /lib64/libz.so dl m pthread rt
    3rdparty dependencies:       ittnotify libprotobuf libjpeg-turbo libwebp libtiff libjasper IlmImf quirc ippiw ippicv

  OpenCV modules:
    To be built:                 calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
    disabled:                    world
    disabled by dependency:      -
    Unavailable:                 java js python2 ts
    Applications:                -
    Documentation:               NO
    Non-free algorithms:         NO

  GUI:
    QT:                          YES (ver 5.15.0)
      QT OpenGL support:         NO
    GTK+:                        NO
    VTK support:                 NO

  Media I/O:
    ZLib:                        /lib64/libz.so (ver 1.2.7)
    JPEG:                        libjpeg-turbo (ver 2.0.5-62)
    WEBP:                        build (ver encoder: 0x020f)
    PNG:                         /lib64/libpng.so (ver 1.5.13)
    TIFF:                        build (ver 42 - 4.0.10)
    JPEG 2000:                   build Jasper (ver 1.900.1)
    openexr:                     build (ver 2.3.0)
    HDR:                         YES
    SUNRASTER:                   YES
    PXM:                         YES
    PFM:                         YES

  Video I/O:
    DC1394:                      NO
    FFMPEG:                      YES
      avcodec:                   YES (58.109.100)
      avformat:                  YES (58.61.100)
      avutil:                    YES (56.60.100)
      swscale:                   YES (5.8.100)
      avresample:                NO
    GStreamer:                   NO
    v4l/v4l2:                    YES (linux/videodev2.h)

  Parallel framework:            pthreads

  Trace:                         YES (with Intel ITT)

  Other third-party libraries:
    Intel IPP:                   2020.0.0 Gold [2020.0.0]
           at:                   /tmp/pip-req-build-99ib2vsi/_skbuild/linux-x86_64-3.8/cmake-build/3rdparty/ippicv/ippicv_lnx/icv
    Intel IPP IW:                sources (2020.0.0)
              at:                /tmp/pip-req-build-99ib2vsi/_skbuild/linux-x86_64-3.8/cmake-build/3rdparty/ippicv/ippicv_lnx/iw
    Lapack:                      NO
    Eigen:                       NO
    Custom HAL:                  NO
    Protobuf:                    build (3.5.1)

  OpenCL:                        YES (no extra features)
    Include path:                /tmp/pip-req-build-99ib2vsI/Opencv/3rdparty/include/opencl/1.2
    Link libraries:              Dynamic load

  Python 3:
    Interpreter:                 /opt/python/cp38-cp38/bin/python (ver 3.8.6)
    Libraries:                   libpython3.8.a (ver 3.8.6)
    numpy:                       /tmp/pip-build-env-qru8fff1/overlay/lib/python3.8/site-packages/numpy/core/include (ver 1.17.3)
    install path:                python

  Python (for build):            /bin/python2.7

  Java:
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Install to:                    /tmp/pip-req-build-99ib2vsi/_skbuild/linux-x86_64-3.8/cmake-install
-----------------------------------------------------------------

更新 2：

我也让 OpenCV 用于 GUI 绘图；然而，仍然存在一些小问题。

我做了什么：

下载并安装 VcXsrv
sudo apt-get 更新
sudo apt-get install python3.8-tk（根据您使用的python版本，您可能需要安装不同的python*-tk）
将以下行添加到 ~/.bashrc export disPLAY=$(cat /etc/resolv.conf | grep nameserver | awk '{print $2; exit;}'):0.0 导出 LIBGL_ALWAYS_INDIRECT=1 须藤 /etc/init.d/dbus start &> /dev/null

这让 Matplotlib 完美运行。此外，使用 OpenCV 的 imshow 工作正常；但是，我收到以下消息：

QObject::movetoThread: 当前线程 (0x5595c0dbcfe0) 不是对象的线程 (0x5595c035df40)。无法移动到目标线程 (0x5595c0dbcfe0)

我实际上得到了大约 50 个相同消息的副本，因此很烦人。

此外，由于我使用 Matplotlib 进行绘图，然后使用 OpenCV 进行 imshow，因此当我使用 Matplotlib 关闭第一个锅时，VcXsrv 仅显示第二个图像。

这是我正在运行的代码片段：

import matplotlib.pyplot as plt
import numpy as np

t = np.arange(0.0,2.0,0.01)
s = 1 + np.sin(2*np.pi*t)
plt.plot(t,s)

plt.title('About as simple as it gets,folks')
plt.show()

import cv2

# load our example image
orig = cv2.imread("beagle.png")
print("Image loaded")
# display our input image
cv2.imshow("Image",orig)
cv2.waitKey(0)