OpenCV in Linux

1. OpenCV 패키지 다운로드
- http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.7/

(현재시점 2.4.7)

 

2. 필요한 파일들을 받는다.
# apt-get install libssl-dev openssl
# apt-get install pkg-config
# apt-get install libgtk2.0-0
# apt-get install libgtk2.0-dev
# apt-get install libavformat-dev libswscale-dev
# apt-get install libjpeg-dev
# apt-get install cmake

# apt-get update
# apt-get install gcc-4.3
# apt-get install build-essential

 

3. OpenCV 압축파일을 해제한다.
# tar xzvf opencv-2.4.7.tar.gz // 압축을 푼다.
# cd opencv-2.4.7
# mkdir release
# cd release

 

4. 중간 파일 빌드 (다시 컴파일 할 경우 여기부터)
# cmake -D CMAKE_BUILD_TYPE=release -D CMAKE_INSTALL_PREFIX=/root/lib -D BUILD_PYTHON_SUPPORT=ON -D BUILD_EXAMPLES=ON ../
or
# cmake . -DUSE_SSE=ON -DUSE_SSE2=ON

 

5. 최종 바이너리 빌드
# make
# make install
# ldconfig

 

6. sample code - mywebcam.c

#include <stdio.h>
#include <cv.h>
#include <highgui.h>
#include <objdetect/objdetect.hpp>
#include <highgui/highgui.hpp>
#include <imgproc/imgproc.hpp>

 

char key;
int main()
{
  CvCapture *capture = cvCaptureFromCAM(CV_CAP_ANY);
  //capture.set(CV_CAP_PROP_FRAME_WIDTH, 400);
  //capture.set(CV_CAP_PROP_FRAME_HEIGHT, 300);
  cvNamedWindow("CAM",1);
  cvResizeWindow("CAM", 400, 300);
 
  while(1)
  {
    IplImage *image = cvQueryFrame(capture);
    cvShowImage("CAM", image);
   
    key = cvWaitKey(10);
    // ESC - break;
    if(key >= 27 ) break;
  }
 
  cvReleaseCapture(&capture);
  cvDestroyWindow("CAM");

  return 0;
}

 

7. make file - mywebcam.mak (mywebcam.mak)

#
# http://www.gnu.org/software/make/manual/make.html
#
CC:=gcc

INCDIR:= -I/root/lib/include -I/root/lib/include/opencv -I/root/lib/include/opencv2
LIBDIR:= -L/root/lib/lib

CFLAGS:=-Wall #-ggdb

LDFLAGS:= -lopencv_core -lopencv_highgui -lopencv_imgproc -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_flann

EXE:= mywebcam.out

#
# This is here to prevent Make from deleting secondary files.
#
.SECONDARY:
 
#
# $< is the first dependency in the dependency list
# $@ is the target name
#
all: dirs $(addprefix bin/, $(EXE)) tags

dirs:
 mkdir -p obj
 mkdir -p bin

tags: *.c

bin/%.out: obj/%.o
 $(CC) $(CFLAGS) $(INCDIR) $(LIBDIR) $(LDFLAGS) -o $@ $<

obj/%.o : %.c
 $(CC) $(CFLAGS) $(INCDIR) $(LIBDIR) $(INCLUDES) -c -o $@ $<

clean:
 rm -f obj/*
 rm -f bin/*

 

8. make & execution

# make -f mywebcam.mak

# ./bin/mywebcam.out