opencv3.4.1 移植到 hi3559

主要参考：https://blog.csdn.net/zhenglie110/article/details/83009675

版本说明：

ubuntu 16.04

opencv 3.4.1

cmake 3.5.1

1.下载源码

下载opencv3.4.1 Linux版源码，
https://opencv.org/opencv-3-4-1.html

2.通过下面的sources，直接下载。

3.安装cmake与cake-gui

sudo apt-get install cmake

sudo apt-get install cmake-gui

3.2使用cmake-gui 进行配置（ps 看到好像有直接使用cmake命令进行配置的，不知道我为什么失败了，后期再查查看！）

运行cmake-gui,增加参数

CMAKE_EXE_LINKER_FLAGS              -lpthread -lrt -ldl
CMAKE_EXE_LINKER_FLAGS_DEBUG        -lpthread -lrt -ldl

支持C11,选中支持

ENABLE_CXX11     YES

设置编译安装目录,可修改，也可默认安装

CMAKE_INSTALL_PREFIX   /usr/local

4.编译和安装

make -j8

make install -j8

或者： sudo make install -j8 （ps： /usr/local/ 需要给予root权限）

4.1出现编译错误：

opencv-3.4.1/3rdparty/protobuf/src/google/protobuf/stubs/common.cc:52:2: error: #error "No suitable threading library available."

解决办法：在common.cc 增加#define HAVE_PTHREAD

#define HAVE_PTHREAD  //新增

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN  // We only need minimal includes
#include <windows.h>
#define snprintf _snprintf    // see comment in strutil.cc
#elif defined(HAVE_PTHREAD)
#include <pthread.h>
#else
#error "No suitable threading library available."
#endif
#if defined(__ANDROID__)
#include <android/log.h>
#endif

4.2继续make，出现错误：

opencv-3.4.1/3rdparty/libpng/pngstruct.h:30:18: fatal error: zlib.h: No such file or directory

~/opencv-3.4.1/CMakeLists.txt，在514行增加以上代码： ocv_include_directories(./3rdparty/zlib/)

......
ocv_include_directories(${OPENCV_CONFIG_FILE_INCLUDE_DIR})
ocv_include_directories(./3rdparty/zlib/) 
......

4.3继续make，出现错误：

[ 43%] Building CXX object apps/visualisation/CMakeFiles/opencv_visualisation.dir/opencv_visualisation.cpp.obj
[ 43%] Linking CXX executable ../../bin/opencv_annotation
../../lib/libopencv_core.so: undefined reference to `pthread_mutexattr_destroy'
../../lib/libopencv_imgcodecs.so: undefined reference to `pthread_create'
../../lib/libopencv_core.so: undefined reference to `pthread_key_create'
../../lib/libopencv_imgcodecs.so: undefined reference to `png_init_filter_functions_neon'
../../lib/libopencv_core.so: undefined reference to `pthread_getspecific'
../../lib/libopencv_core.so: undefined reference to `dlopen'
../../lib/libopencv_core.so: undefined reference to `pthread_mutex_trylock'
../../lib/libopencv_core.so: undefined reference to `pthread_key_delete'
../../lib/libopencv_core.so: undefined reference to `dlclose'
../../lib/libopencv_core.so: undefined reference to `dlsym'
../../lib/libopencv_core.so: undefined reference to `pthread_mutexattr_settype'
../../lib/libopencv_imgcodecs.so: undefined reference to `pthread_join'
../../lib/libopencv_core.so: undefined reference to `pthread_setspecific'
../../lib/libopencv_core.so: undefined reference to `pthread_mutexattr_init'
collect2: error: ld returned 1 exit status

解决办法：CMakeCache.txt上约273行，CMAKE_EXE_LINKER_FLAGS和CMAKE_EXE_LINKER_FLAGS_DEBUG，

添加： -lpthread -lrt -ldl

......
//Flags used by the linker.
CMAKE_EXE_LINKER_FLAGS:STRING=-lpthread -lrt -ldl

//Flags used by the linker during debug builds.
CMAKE_EXE_LINKER_FLAGS_DEBUG:STRING=-lpthread -lrt -ldl

......

（PS:前面设置cmake-gui，配置失败了）

4.4继续make，出现错误：

[ 43%] Linking CXX executable ../../bin/opencv_annotation
../../lib/libopencv_imgcodecs.so: undefined reference to `png_init_filter_functions_neon'
collect2: error: ld returned 1 exit status
apps/annotation/CMakeFiles/opencv_annotation.dir/build.make:99: recipe for target 'bin/opencv_annotation' failed
make[2]: *** [bin/opencv_annotation] Error 1
CMakeFiles/Makefile2:4431: recipe for target 'apps/annotation/CMakeFiles/opencv_annotation.dir/all' failed
make[1]: *** [apps/annotation/CMakeFiles/opencv_annotation.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

解决如下：~/opencv-3.4.1/3rdparty/libpng/pngpriv.h

128 /*#  if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \*/
 129 #   if defined(PNG_ARM_NEON) && (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \

5.copy lib 和 include到工具链下

sudo cp -rv opencv/output/lib/* /opt/hisi-linux/x86-arm/aarch64-himix100-linux/aarch64-linux-gnu/lib/

sudo cp -rv opencv/output/lincude/* /opt/hisi-linux/x86-arm/aarch64-himix100-linux/include/

(ps: 理论应该放到/opt/hisi-linux/x86-arm/aarch64-himix100-linux/aarch64-linux-gnu/include/,后面有时间再试下！)

6. 编译face.cpp

#include <stdio.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sys/reboot.h>
#include <sys/time.h>

#include "opencv/cv.h"
#include "opencv/highgui.h"
#include "opencv2/highgui.hpp"

using namespace cv;
using namespace std;

#ifdef __cplusplus
#if __cplusplus
extern "C"{
#endif
#endif /* __cplusplus */

/******************for time mesurement*************************/

struct timeval tpstart,tpend;
unsigned long timeuses;
void timeRec()
{
    gettimeofday(&tpstart,0);
}
int timeRep()
{
    gettimeofday(&tpend,0);
    timeuses=(tpend.tv_sec-tpstart.tv_sec)*1000000+tpend.tv_usec-tpstart.tv_usec;
    printf("use time: %uus\n",timeuses);
    return timeuses;
}
/********************end**************************************/

int main(int argc, char* argv[])
{
   IplImage* img = NULL;
   IplImage* cutImg = NULL;
   CvMemStorage* storage = cvCreateMemStorage(0);
   CvHaarClassifierCascade* cascade = (CvHaarClassifierCascade*)cvLoad("/root/haarcascade_frontalface_alt2.xml", 0, 0, 0);
   CvSeq* faces;
   Mat dest;
      
    img = cvLoadImage(argv[1], 0);
   timeRec();
    faces = cvHaarDetectObjects(img, cascade,  storage, 1.2, 2, 0, cvSize(25,25) );
    timeRep();
    if (faces->total == 0){
        printf("no face!\n");
    }
    cvSetImageROI(img, *((CvRect*)cvGetSeqElem( faces, 0))); 
    //cvSaveImage("face.bmp", img);
    dest = cvarrToMat(img);
    imwrite("face.bmp", dest);      
    cvResetImageROI(img);
    printf("face detected! in face.bmp!\n");
}

#ifdef __cplusplus
#if __cplusplus
}
#endif
#endif /* __cplusplus */

6.1编译命令如下：

aarch64-himix100-linux-g++ face.cpp -o face -I/usr/local/include -L/usr/local/lib -lopencv_highgui -lopencv_core -lopencv_imgproc -lpthread -lrt -ldl -lopencv_objdetect -lopencv_imgcodecs

会出现如下的警告warning：

chad@ubuntu:~$ aarch64-himix100-linux-g++ face.cpp -o face -I/usr/local/include -L/usr/local/lib -lopencv_highgui -lopencv_core -lopencv_imgproc -lpthread -lrt -ldl -lopencv_objdetect -lopencv_imgcodecs
/opt/hisi-linux/x86-arm/aarch64-himix100-linux/host_bin/../lib/gcc/aarch64-linux-gnu/6.3.0/../../../../aarch64-linux-gnu/bin/ld: warning: ../../lib/libopencv_videoio.so, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
/opt/hisi-linux/x86-arm/aarch64-himix100-linux/host_bin/../lib/gcc/aarch64-linux-gnu/6.3.0/../../../../aarch64-linux-gnu/bin/ld: warning: ../../lib/libopencv_imgcodecs.so, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
/opt/hisi-linux/x86-arm/aarch64-himix100-linux/host_bin/../lib/gcc/aarch64-linux-gnu/6.3.0/../../../../aarch64-linux-gnu/bin/ld: warning: ../../lib/libopencv_imgproc.so, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
/opt/hisi-linux/x86-arm/aarch64-himix100-linux/host_bin/../lib/gcc/aarch64-linux-gnu/6.3.0/../../../../aarch64-linux-gnu/bin/ld: warning: ../../lib/libopencv_core.so, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)

实际上已编译完成，因为include和warning不在编译默认的include，lib，故报warning，可设置warning等级即可（后面找时间再确认下）。

注意：需要将include，lib文件copy到对应hi3559的目录下：/usr/local/，运行 ./face 即可。

7. 执行 ./face 0_1_1_bk.jpg，结果如下：

~ # ./face  0_1_1_bk.jpg 
use time: 1241561us
face detected! in face.bmp!

表明已正常加载库并检测人脸成功，到这里可以说明移植opencv库已基本成功 ^ . ^!

参考其他人的操作，主要目的是记录实际移植中遇到的问题和解决方法。

更新中

opencv3.4.1 移植到 hi3559

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