구차니의 잡동사니 모음

오랫만에 빌드하니 다 까먹었네 -_ㅠ

g++ myprog.cpp -lopencv_core -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -o myprog

[링크 : https://answers.opencv.org/question/165673]

아놔.. 에러 뿜뿜 -_-

/usr/bin/ld: warning: libopencv_imgproc.so.3.4, needed by //usr/local/lib/libopencv_dnn.so, may conflict with libopencv_imgproc.so.3.2
/usr/bin/ld: warning: libopencv_core.so.3.4, needed by //usr/local/lib/libopencv_dnn.so, may conflict with libopencv_core.so.3.2
/usr/bin/ld: /tmp/cc64nD60.o: undefined reference to symbol '_ZNK2cv3Mat5emptyEv'
/usr/bin/ld: //usr/local/lib/libopencv_core.so.3.4: error adding symbols: DSO missing from command line

+

아무튼 라즈베리 3B 에서 하는데

3.2.0이 설치되어 있고, 필요에 의해서 3.4.0을 빌드해서 설치했더니 3.2.0과 섞여서 난리가 났다.

그래서 -L 옵션을 통해 3.4.0이 설치된 곳을 우선적으로 보도록 해주니 문제없이 해결!

$ whereis libopencv_imgproc
libopencv_imgproc: /usr/lib/arm-linux-gnueabihf/libopencv_imgproc.so /usr/lib/arm-linux-gnueabihf/libopencv_imgproc.a /usr/local/lib/libopencv_imgproc.so

$ ls -al /usr/local/lib/libopencv_imgproc.so*
lrwxrwxrwx 1 root root      24 Jan 14 08:04 /usr/local/lib/libopencv_imgproc.so -> libopencv_imgproc.so.3.4
lrwxrwxrwx 1 root root      27 Jan 14 08:04 /usr/local/lib/libopencv_imgproc.so.3.4 -> libopencv_imgproc.so.3.4.13
-rw-r--r-- 1 root root 3292320 Jan 14 05:01 /usr/local/lib/libopencv_imgproc.so.3.4.13

$ ls -al /usr/lib/arm-linux-gnueabihf/libopencv_imgproc.so
lrwxrwxrwx 1 root root 24 Feb 12  2019 /usr/lib/arm-linux-gnueabihf/libopencv_imgproc.so -> libopencv_imgproc.so.3.2

$ g++ opencv_video.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib

MobileNet-SSD의 ssd_detect.cpp 빌드하려다가

아 몰라 대충 흑화중.. 후...

sudo apt-get install libcaffe-cpu-dev libcaffe-cpu1 libboost-all-dev libgflags-dev libgoogle-glog-dev libprotobuf-dev libopenblas-dev

$ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect
ssd_detect.cpp:15:10: fatal error: caffe/caffe.hpp: No such file or directory
 #include <caffe/caffe.hpp>
          ^~~~~~~~~~~~~~~~~
compilation terminated.
pi@raspberrypi:~/src/MobileNet-SSD $ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect
In file included from /usr/include/caffe/blob.hpp:8,
                 from /usr/include/caffe/caffe.hpp:7,
                 from ssd_detect.cpp:15:
/usr/include/caffe/common.hpp:4:10: fatal error: boost/shared_ptr.hpp: No such file or directory
 #include <boost/shared_ptr.hpp>
          ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

pi@raspberrypi:~/src/MobileNet-SSD $ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect
In file included from /usr/include/caffe/blob.hpp:8,
                 from /usr/include/caffe/caffe.hpp:7,
                 from ssd_detect.cpp:15:
/usr/include/caffe/common.hpp:5:10: fatal error: gflags/gflags.h: No such file or directory
 #include <gflags/gflags.h>
          ^~~~~~~~~~~~~~~~~
compilation terminated.
$ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect
In file included from /usr/include/caffe/common.hpp:19,
                 from /usr/include/caffe/blob.hpp:8,
                 from /usr/include/caffe/caffe.hpp:7,
                 from ssd_detect.cpp:15:
/usr/include/caffe/util/device_alternate.hpp:34:10: fatal error: cublas_v2.h: No such file or directory
 #include <cublas_v2.h>
          ^~~~~~~~~~~~~
compilation terminated.

-DCPU_ONLY


 $ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect -DCPU_ONLY
In file included from /usr/include/caffe/util/math_functions.hpp:11,
                 from /usr/include/caffe/filler.hpp:13,
                 from /usr/include/caffe/caffe.hpp:9,
                 from ssd_detect.cpp:15:
/usr/include/caffe/util/mkl_alternate.hpp:14:10: fatal error: cblas.h: No such file or directory
 #include <cblas.h>
          ^~~~~~~~~
compilation terminated.

$ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect -DCPU_ONLY -lcaffe
/usr/bin/ld: /tmp/ccDNrn3i.o: undefined reference to symbol '_ZN6google4base21CheckOpMessageBuilder7ForVar2Ev'
/usr/bin/ld: //lib/arm-linux-gnueabihf/libglog.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status


$ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect -DCPU_ONLY -lcaffe -lglog
/usr/bin/ld: /tmp/ccO8VjqT.o: undefined reference to symbol '_ZN6google26ShowUsageWithFlagsRestrictEPKcS1_'
/usr/bin/ld: //lib/arm-linux-gnueabihf/libgflags.so.2.2: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status




$ g++ ssd_detect.cpp -lopencv_core -lopencv_dnn -lopencv_imgproc -lopencv_videoio -lopencv_highgui -lopencv_objdetect -lopencv_imgcodecs -L/usr/local/lib -o ssd_detect -DCPU_ONLY -lcaffe -lgflags -lglog
/usr/bin/ld: warning: libopencv_imgcodecs.so.3.2, needed by /usr/lib/gcc/arm-linux-gnueabihf/8/../../../arm-linux-gnueabihf/libcaffe.so, may conflict with libopencv_imgcodecs.so.3.4
/usr/bin/ld: warning: libopencv_imgproc.so.3.2, needed by /usr/lib/gcc/arm-linux-gnueabihf/8/../../../arm-linux-gnueabihf/libcaffe.so, may conflict with libopencv_imgproc.so.3.4
/usr/bin/ld: warning: libopencv_core.so.3.2, needed by /usr/lib/gcc/arm-linux-gnueabihf/8/../../../arm-linux-gnueabihf/libcaffe.so, may conflict with libopencv_core.so.3.4

caffe 빌드

위에 lib들 설치하고 아래것 추가로 설치

자동 번역인진 모르겠지만 "명명된 인자" 라는 명칭으로 메소드 호출이나

객체 생성시 변수 순서와 상관없이 인자명칭을 직접 지정해서 호출 할 수 있는 문법

아래의 코드에서 Main() 안의 moto.Drive() 를 보면

원래 Drive() 메소드는 int miles, int speed로 선언되어 있으나

moto.Drive(speed: 60, miles: 170) 으로

선언된 인자와 다른 순서로 입력을 해주는 것을 볼 수 있다.

using System;

class TestMotorcycle : Motorcycle
{
   public override int Drive(int miles, int speed)
   {
      return (int) Math.Round( ((double)miles) / speed, 0);
   }

   public override double GetTopSpeed()
   {
      return 108.4;
   }

   static void Main()
   {

      TestMotorcycle moto = new TestMotorcycle();
      moto.StartEngine();
      moto.AddGas(15);
      var travelTime = moto.Drive(speed: 60, miles: 170);
      Console.WriteLine("Travel time: approx. {0} hours", travelTime);
   }
}
// The example displays the following output:
//      Travel time: approx. 3 hours

[링크 : https://docs.microsoft.com/en-us/dotnet/csharp/methods]

[링크 : https://docs.microsoft.com/ko-kr/dotnet/csharp/methods]