二维码解析库zbar+openCV的移植和使用

版权声明：copyright@xxdk2017 https://blog.csdn.net/u011583798/article/details/78052014

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1. zbar linux-X86平台编译
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./configure --without-imagemagick --disable-video --without-qt --without-gtk --without-x --without-python --exec-prefix=/mnt/view/dsp_rv1108/app/qrdecoder/install --prefix=/mnt/view/dsp_rv1108/app/qrdecoder/install
make
make install 
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2. zbar linux-ARM平台交叉编译
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CC=arm-linux-gcc ./configure --host=arm-linux --without-imagemagick --disable-video --without-qt --without-gtk --without-x --without-python --exec-prefix=/mnt/view/dsp_rv1108/app/qrdecoder_cross_compile/install --prefix=/mnt/view/dsp_rv1108/app/qrdecoder_cross_compile/install LIBS=-L/mnt/view/dsp_rv1108/app/qrdecoder_cross_compile/libs/lib CPPFLAGS=-I/mnt/view/dsp_rv1108/app/qrdecoder_cross_compile/libs/include 
make
make install
其中:
CC 指定交叉gcc编译器名称
CPP 指定交叉g++编译器名称
--host 指定目标平台
--prefix 指定install 路径
LIBS=-L 指定编译时依赖的库路径 (可选)
CFLAGS CPPFLAGS 指定编译时的自定义头文件路径 (可选)
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3. linux-x86平台测试用例编译
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cd 到 release 文件夹下
make

./qrdecoder xxdk.png

对应的Makefile：

备注：确保PC平台已经安装openCV

SRCS = $(wildcard *.cpp)    # wildcard把 指定目录 ./ 下的所有后缀是cpp的文件全部展开。
OBJS = $(SRCS:.cpp = .o)    # OBJS将$(SRCS)下的.cpp文件转化为.o文件
CXX = g++                   # 代表所使用的编译器
INCLUDES = -I/usr/local/include/opencv -I.    # 头文件查找路径 
LIBS =  -L/usr/local/lib \
        -lzbar \
		-lopencv_core \
		-lopencv_imgproc \
		-lopencv_highgui \
		-lopencv_imgcodecs                    # 链接库查找地址
CXXFLAGS = -g -Wall -O0   #附加参数
OUTPUT = qrdecoder   	  #输出程序名称

all:$(OUTPUT)
$(OUTPUT) : $(OBJS)
	$(CXX) $^ -o $@ $(INCLUDES) $(LIBS)

%.o : %.cpp
	$(CXX) -c $< $(CXXFLAGS)

.PHONY:clean
clean:
	rm -rf *.out *.o qrdecoder    #清除中间文件及生成文件

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4. linux-ARM平台测试用例编译
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cd 到 release 文件夹下
make

编译完自动拷贝到SD卡

./qrdecoder xxdk.png

对应的Makefile：

注意：此处用到opencv的静态库，以及其他makefile中的静态库需要提前编译

SRCS = $(wildcard *.cpp)    
OBJS = $(SRCS:.cpp = .o)   
CXX = ../../../prebuilts/toolschain/usr/bin/arm-linux-g++
STRIP = ../../../prebuilts/toolschain/usr/bin/arm-linux-strip

INCLUDES = 	-I../../../external/libopencv/include/opencv \
			-I../../../external/libopencv/include/opencv2/core \
			-I../../../external/libopencv/include/opencv2 \
			-I../../../external/libopencv/include \
			-I../../../external/libopencv \
			-I../libs/include \
			-I../libs/include/zbar \
			-I. 
LIBS =  -L../../../external/libopencv \
		-L../libs/lib \
		-L../ \
		-L. \
		-lopencv_imgcodecs \
		-lopencv_imgproc \
		-lopencv_core \
		-lopencv_highgui \
		-lzbar \
		-lz \
		-liconv \
		-lpthread \
		-ltiff \
		-ljpeg \
		-llibjasper \
		#-llibjpeg \
		#-llibtiff \
		#-ltiffxx \
		#-lpng \

#CXXFLAGS = -g -Wall -O0   
OUTPUT = qrdecoder   	 

all:$(OUTPUT)
$(OUTPUT) : $(OBJS)
	$(CXX) $^ -o $@ $(INCLUDES) $(LIBS)
	$(STRIP) $(OUTPUT)
	@if [ -d /media/qfeel/56A0-9C18 ]; then \
		rm /media/qfeel/56A0-9C18/qrdecoder; \
		mv $(OUTPUT) /media/qfeel/56A0-9C18; \
	else \
		rm $(OUTPUT); \
		echo "please insert sd card!"; \
	fi

%.o : %.cpp
	$(CXX) -c $< $(CXXFLAGS)


.PHONY:clean
clean:
	rm -rf *.out *.o qrdecoder    

通用的测试用例：

#include <cv.h>
#include <zbar.h>
#include <iostream>      
#include <highgui.h>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
  
using namespace std;      
using namespace zbar;  
using namespace cv;      
  
int main(int argc, char*argv[])    
{      
	if(argc != 2) {
		cout << "usage: qrdecoder <picture-name> " << endl;
		return 0;
	}
	//
	// 实例化扫描器对象,并配置
	//
    ImageScanner scanner;      
    scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1);    
	//
	// 读取图片
	//
    Mat imageGray = imread(argv[1], 0);      
	//
	// 图像灰度化
	//
    //cvtColor(image, imageGray, CV_RGB2GRAY);      
    int width = imageGray.cols;      
	cout << "width = "<< width << endl;
	cout << 3 << endl;
    int height = imageGray.rows;      
	cout << "height = "<< height << endl;
    uchar *raw = (uchar *)imageGray.data;         
	//
	// 实例化Image对象, 按照"Y800"格式构造
	// imageZbar 对象, 并讲图像数据传入该对象
	//
	cout << 4 << endl;
    Image imageZbar(width, height, "Y800", raw, width * height);        
	//
	// 调度扫描器扫描Image对象imageZber
	//
	cout << 5 << endl;
    scanner.scan(imageZbar); 
    Image::SymbolIterator symbol = imageZbar.symbol_begin();  
    if(imageZbar.symbol_begin() == imageZbar.symbol_end()) {  
		cout << 6 << endl;
        cout<<"decode error, check image!"<<endl;  
    }  

	cout << 7 << endl;
    for(; symbol != imageZbar.symbol_end(); ++symbol) {      
		cout << 8 << endl;
        cout << "code type: " << symbol->get_type_name() << endl;
        cout << "code data: " << symbol->get_data() << endl;
    }      
//  imshow("XXDK Image", image);        
//  waitKey();    
    imageZbar.set_data(NULL, 0);  

    return 0;  
}