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使用docker运行OpenCV+golang

  • 参考

    • https://github.com/hybridgroup/gocv
    • https://hub.docker.com/r/hybridgroup/gocv

  • 结论

    • docker+gocv 可以作为服务器程序，在服务器上高速执行

  • 首先 pull docker

    • docker pull hybridgroup/gocv
    • 运行后
      • 发现golang版本太低，不能执行代码，需要升级

下载 go1.13.3.linux-amd64.tar.gz https://dl.google.com/go/go1.13.3.linux-amd64.tar.gz 不行 https://studygolang.com/dl/golang/go1.13.3.linux-amd64.tar.gz

docker run -it -v /Users/play/github/gocv:/gocv hybridgroup/gocv 进入后，解压，即可 ```shell script 1 cd /gocv/ 2 rm -rf /usr/local/go 3 tar -C /usr/local -xzf go1.13.3.linux-amd64.tar.gz 4 go version

退出
```shell script
(.py3) pro:~ play$ docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES
f2dc43cabe71        hybridgroup/gocv    "/bin/bash"         12 minutes ago      Exited (0) 2 seconds ago                       hopeful_lehmann
ec9d94cacbe1        pypy:3.6            "pypy3"             16 hours ago        Exited (0) 16 hours ago                        admiring_vaughan

#将容器打包成一个新的镜像
(.py3) pro:~ play$ docker commit  f2dc43cabe71 gocv:go1.13
sha256:033be3d5044d7f84ff552255e0c7f3d1da7c92d3a462342d37799b3f02f519fa
(.py3) pro:~ play$ docker image ls |grep gocv
gocv                go1.13              033be3d5044d        16 seconds ago      1.5GB
hybridgroup/gocv    latest              f236ffa190b7        7 weeks ago         1.14GB


#测试
docker run -it  -v /Users/play/github/gocv:/gocv  gocv:go1.13
root@d7b692fdda37:/gocv/cmd/version# go run main.go
gocv version: 0.21.0
opencv lib version: 4.0.1
root@d7b692fdda37:/gocv/cmd/version# go version
go version go1.13.3 linux/amd64
  • 执行脸部识别程序 ```shell script root@d7b692fdda37:/gocv/cmd/facedetect# cd /gocv/cmd/facedetect-from-url/ root@d7b692fdda37:/gocv/cmd/facedetect-from-url# go build -o facedetect main.go root@d7b692fdda37:/gocv/cmd/facedetect-from-url# ll -h total 8.3M drwxr-xr-x 4 root root 128 Jan 1 03:36 ./ drwxr-xr-x 30 root root 960 Dec 2 10:39 ../ -rwxr-xr-x 1 root root 8.3M Jan 1 03:36 facedetect* -rw-r--r-- 1 root root 1.9K Dec 2 11:04 main.go root@d7b692fdda37:/gocv/cmd/facedetect-from-url# ./facedetect How to run: facedetect-from-url [image URL] [classifier XML file] [image file]

root@d7b692fdda37:/gocv/cmd/facedetect-from-url# ./facedetect https://raw.githubusercontent.com/hybridgroup/gocv/master/images/face.jpg ../../data/haarcascade_frontalface_default.xml output2.jpg

[./facedetect https://raw.githubusercontent.com/hybridgroup/gocv/master/images/face.jpg ../../data/haarcascade_frontalface_default.xml output2.jpg] Get(imageURL) found 1 faces saved to output2.jpg

root@d7b692fdda37:/gocv/cmd/facedetect-from-url# ll -h total 8.3M drwxr-xr-x 5 root root 160 Jan 1 03:38 ./ drwxr-xr-x 31 root root 992 Jan 1 03:38 ../ -rwxr-xr-x 1 root root 8.3M Jan 1 03:36 facedetect* -rw-r--r-- 1 root root 1.9K Dec 2 11:04 main.go -rw-r--r-- 1 root root 39K Jan 1 03:38 output2.jpg 

- 大问题：不能编译跨平台程序，因为OpenCV
    - 在Linux编译macOS程序
```shell script
root@d7b692fdda37:/gocv/cmd/showimage# CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build main.go
# gocv.io/x/gocv
/gocv/dnn_ext.go:9:28: undefined: Mat
/gocv/dnn_ext.go:16:12: undefined: NewMatWithSize
/gocv/dnn_ext.go:42:2: undefined: Resize
/gocv/dnn_ext.go:42:38: undefined: InterpolationDefault
/gocv/dnn_ext.go:45:3: undefined: CvtColor
/gocv/dnn_ext.go:48:15: undefined: NewMat
/gocv/dnn_ext.go:51:31: undefined: MatTypeCV32F