java实现二维码识别(ZBar)
要求：系统Centos7.x
第一步安装Cmake
yum install -y gcc gcc-c++ wget
wget https://cmake.org/files/v3.14/cmake-3.14.0.tar.gz
tar -zxvf cmake-3.14.0.tar.gz
cd cmake-3.14.0
./bootstrap
gmake
gmake install
rm -rf /usr/bin/cmake
ln -s /usr/local/bin/cmake /usr/bin/cmake第二步编译libz
tar -xvf zlib-1.2.11.tar.gz
cd zlib-1.2.11
mkdir build
cd build
touch build.shbuild.sh
cmake -G "Unix Makefiles" \
-D CMAKE_BUILD_TYPE=Release \
-D CMAKE_INSTALL_PREFIX=/var/SDK/install/zlib \
-D CMAKE_C_FLAGS="-fPIC" \
-D CMAKE_CXX_FLAGS="-fPIC" ..chmod -R 777 build.sh
./build.sh
make
make install第三步编译libpng
tar -xvf libpng-1.5.30.tar.xz
cd libpng-1.5.30
touch build.shbuild.sh
export CFLAGS="-I/var/SDK/install/zlib/include -fPIC"
export CPPFLAGS="-I/var/SDK/install/zlib/include -fPIC"
export LDFLAGS="-L/var/SDK/install/zlib/lib"
./configure --prefix=/var/SDK/install/libpngchmod -R 777 build.sh
./build.sh
make
make install第四步编译opencv
unzip opencv-4.1.0.zip
cd opencv-4.1.0
mkdir build
cd build
touch build.shbuild.sh
cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/var/SDK/install/opencv \
-D BUILD_SHARED_LIBS=OFF \
-D WITH_FFMPEG=ON \
-D ENABLE_CXX11=1 ..chmod -R 777 build.sh
./build.sh
make
make install第四步编译zbar
tar -xvf zbar-0.10.tar.bz2
cd zbar-0.10
touch build.shbuild.sh
export CFLAGS="-I/var/SDK/install/zlib/include -fPIC"
export CPPFLAGS="-I/var/SDK/install/zlib/include -fPIC"
export LDFLAGS="-L/var/SDK/install/zlib/lib"
./configure --without-imagemagick --disable-video --without-gtk --without-qt --with-x --prefix=/var/SDK/install/zbar --without-python --without-jpeg --disable-shared --enable-static
make
make install
chmod -R 777 build.sh
./build.sh
make
make install第五步编译c++的二维码识别程序
mkdir /var/SDK/project/zbar
cd /var/SDK/project/zbar
touch CMakeLists.txt
touch opencv_core.h
touch opencv_core.cpp
touch zbar_core.h
touch zbar_core.cpp
touch test.cppCMakeLists.txt
cmake_minimum_required(VERSION 3.4.1)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
add_library(libittnotify STATIC IMPORTED)
set_target_properties(libittnotify PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/libittnotify.a)
add_library(libquirc STATIC IMPORTED)
set_target_properties(libquirc PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/libquirc.a)
add_library(liblibprotobuf STATIC IMPORTED)
set_target_properties(liblibprotobuf PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/liblibprotobuf.a)
add_library(libIlmImf STATIC IMPORTED)
set_target_properties(libIlmImf PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/libIlmImf.a)
add_library(liblibjasper STATIC IMPORTED)
set_target_properties(liblibjasper PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/liblibjasper.a)
add_library(liblibwebp STATIC IMPORTED)
set_target_properties(liblibwebp PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/liblibwebp.a)
add_library(liblibtiff STATIC IMPORTED)
set_target_properties(liblibtiff PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/liblibtiff.a)
add_library(liblibjpeg-turbo STATIC IMPORTED)
set_target_properties(liblibjpeg-turbo PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/opencv4/3rdparty/liblibjpeg-turbo.a)
add_library(libopencv_video STATIC IMPORTED)
set_target_properties(libopencv_video PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_video.a)
add_library(libopencv_stitching STATIC IMPORTED)
set_target_properties(libopencv_stitching PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_stitching.a)
add_library(libopencv_objdetect STATIC IMPORTED)
set_target_properties(libopencv_objdetect PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_objdetect.a)
add_library(libopencv_calib3d STATIC IMPORTED)
set_target_properties(libopencv_calib3d PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_calib3d.a)
add_library(libopencv_features2d STATIC IMPORTED)
set_target_properties(libopencv_features2d PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_features2d.a)
add_library(libopencv_dnn STATIC IMPORTED)
set_target_properties(libopencv_dnn PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_dnn.a)
add_library(libopencv_photo STATIC IMPORTED)
set_target_properties(libopencv_photo PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_photo.a)
add_library(libopencv_ml STATIC IMPORTED)
set_target_properties(libopencv_ml PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_ml.a)
add_library(libopencv_flann STATIC IMPORTED)
set_target_properties(libopencv_flann PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_flann.a)
add_library(libopencv_highgui STATIC IMPORTED)
set_target_properties(libopencv_highgui PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_highgui.a)
add_library(libopencv_videoio STATIC IMPORTED)
set_target_properties(libopencv_videoio PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_videoio.a)
add_library(libopencv_imgcodecs STATIC IMPORTED)
set_target_properties(libopencv_imgcodecs PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_imgcodecs.a)
add_library(libopencv_imgproc STATIC IMPORTED)
set_target_properties(libopencv_imgproc PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_imgproc.a)
add_library(libopencv_core STATIC IMPORTED)
set_target_properties(libopencv_core PROPERTIES IMPORTED_LOCATION /var/SDK/install/opencv/lib64/libopencv_core.a)
add_library(libzbar STATIC IMPORTED)
set_target_properties(libzbar PROPERTIES IMPORTED_LOCATION /var/SDK/install/zbar/lib/libzbar.a)
add_library(libz STATIC IMPORTED)
set_target_properties(libz PROPERTIES IMPORTED_LOCATION /var/SDK/install/zlib/lib/libz.a)
add_library(libpng15 STATIC IMPORTED)
set_target_properties(libpng15 PROPERTIES IMPORTED_LOCATION /var/SDK/install/libpng/lib/libpng15.a)
message("include 头文件目录")
include_directories(/var/SDK/install/opencv/include/opencv4)
include_directories(/var/SDK/install/zbar/include)
include_directories(/var/java/jdk1.8.0_221/include)
include_directories(/var/java/jdk1.8.0_221/include/linux)
include_directories(${SRC_ROOT_PATH}/)
message("设置源码根路径，即 cpp 目录")
set(SRC_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})
message(${SRC_ROOT_PATH})
message("定义要编译的文件列表变量")
file(GLOB CPP_FILES_IN_UTILS "${SRC_ROOT_PATH}/*.cpp")
message("设置要编译的源文件")
set(SOURCE_FILES ${CPP_FILES_IN_UTILS})
add_library(qrcode2 SHARED ${SOURCE_FILES})
target_link_libraries(
qrcode2
libzbar
libopencv_video
libopencv_stitching
libopencv_objdetect
libopencv_calib3d
libopencv_features2d
libopencv_dnn
libopencv_photo
libopencv_ml
libopencv_flann
libopencv_highgui
libopencv_videoio
libopencv_imgcodecs
libopencv_imgproc
libopencv_core
libittnotify
libquirc
liblibprotobuf
libIlmImf
liblibjasper
liblibwebp
liblibtiff
liblibjpeg-turbo
libpng15
libz
)zbar_core.h
#pragma once
char * decodeByZbar(const char* fromPath);zbar_core.cpp
#ifndef zxing_parse_h
#define zxing_parse_h
#include "zbar.h"
#include
#include "zbar_core.h"
#include "opencv2/opencv.hpp"
#endif
using namespace std;
using namespace zbar; //添加zbar名称空间
using namespace cv;
char * decodeByZbar(const char* fromPath) {
ImageScanner scanner;
scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1);
cv::Mat image = cv::imread(fromPath, 1);
if (!image.data) {
return nullptr;
}
Mat imageGray;
cvtColor(image, imageGray, COLOR_RGB2GRAY);
int width = imageGray.cols;
int height = imageGray.rows;
uchar* raw = (uchar*)imageGray.data;
Image imageZbar(width, height, "Y800", raw, width * height);
scanner.scan(imageZbar); //扫描条码
Image::SymbolIterator symbol = imageZbar.symbol_begin();
if (imageZbar.symbol_begin() == imageZbar.symbol_end())
{
cout << "查询条码失败，请检查图片！" << endl;
}
string result;
for (; symbol != imageZbar.symbol_end(); ++symbol)
{
//cout << "类型：" << endl << symbol->get_type_name() << endl << endl;
//cout << "条码：" << endl << symbol->get_data() << endl << endl;
result= symbol->get_data();
}
imageZbar.set_data(NULL, 0);
const int len = result.length();
char* c=(char *)malloc(sizeof(char *) * len);
strcpy(c,result.c_str());
return c;
} opencv_core.h
#pragma once
int opencv_detail(const char* fromPath,const char* toPath);opencv_core.cpp
#ifndef opencv_core_h
#define opencv_core_h
#include
#include "opencv2/opencv.hpp"
#include "opencv_core.h"
#endif
using namespace cv;
using namespace std;
int opencv_detail(const char* fromPath,const char* toPath)
{
Mat src = imread(fromPath);
if (src.empty()) {
printf("error");
return -1;
}
Mat gray;
cvtColor(src, gray, COLOR_RGB2GRAY);
Mat binary;
threshold(gray, binary, 0, 255, THRESH_BINARY | THRESH_OTSU);
vector> contours;
vector hireachy;
findContours(binary.clone(), contours, hireachy, RETR_TREE, CHAIN_APPROX_NONE, Point());
vector> filter1;
int ic = 0;
int parentIdx = -1;
for (int i = 0; i < contours.size(); i++)
{
if (hireachy[i][2] != -1 && ic == 0)
{
parentIdx = i;
ic++;
}
else if (hireachy[i][2] != -1)
{
ic++;
}
else if (hireachy[i][2] == -1)
{
if (ic == 2) {
RotatedRect rect1 = minAreaRect(contours[parentIdx]);
RotatedRect rect2 = minAreaRect(contours[parentIdx + 1]);
RotatedRect rect3 = minAreaRect(contours[parentIdx + 2]);
if (rect1.size.width / rect1.size.height > 0.85) {
if ((rect1.size.width - rect2.size.width) / 2 + (rect2.size.width - rect3.size.width) / 2 < rect3.size.width) {
filter1.push_back(contours[parentIdx]);
}
}
}
parentIdx = -1;
ic = 0;
}
}
if (filter1.size() < 3) {
//imshow("input_image", src);
imwrite(toPath, src);
// waitKey();
return 0;
}
RotatedRect minRect1 = minAreaRect(Mat(filter1[0]));
RotatedRect minRect2 = minAreaRect(Mat(filter1[1]));
RotatedRect minRect3 = minAreaRect(Mat(filter1[2]));
int minLeft = min(min(minRect1.center.x, minRect2.center.x), minRect3.center.x);
int maxLeft = max(max(minRect1.center.x, minRect2.center.x), minRect3.center.x);
int minTop = min(min(minRect1.center.y, minRect2.center.y), minRect3.center.y);
int maxTop = max(max(minRect1.center.y, minRect2.center.y), minRect3.center.y);
int rectWidth = minRect1.size.width / 2;
Rect rect(minLeft - rectWidth, minTop - rectWidth, maxLeft - minLeft + minRect1.size.width, maxLeft - minLeft + minRect1.size.width);
Mat mat = src(rect);
//namedWindow("input_image", WINDOW_AUTOSIZE);
//imshow("input_image", mat);
imwrite(toPath, mat);
//waitKey();
return 0;
} test.cpp
#include "jni.h"
#ifndef dllmain_h
#define dllmain_h
#include
#include "opencv_core.h"
#include "zbar_core.h"
#endif
#define FROM_PATH_NULL -1001
#define TO_PATH_NULL -1002
#include
using namespace std; //这两个支持linux cout
extern "C" {
JNIEXPORT jstring JNICALL Java_com_java_wjs_opencv_qr_QRScan_decodeByZbar(JNIEnv* env, jobject jobj, jstring fromPath) {
jboolean b=false;
const char* fromPathStr = env->GetStringUTFChars(fromPath, &b);
if (fromPathStr == NULL || strlen(fromPathStr) == 0 || fromPathStr[0] == '\0') {
return env->NewStringUTF("-1001");
}
char* result=decodeByZbar(fromPathStr);
if (result != NULL) {
env->ReleaseStringUTFChars(fromPath, fromPathStr);
jstring rt=env->NewStringUTF(result);
free(result);
return rt;
}
return env->NewStringUTF("-1003");
}
} 编写 QRScan.java
package com.java.wjs.opencv.qr;
public class QRScan {
static {
System.loadLibrary("qrcode2");
}
public native String decodeByZbar(String fromPath);
}编写Main.java
package com.java.wjs.opencv.qr;
public class Main {
private static final String PATH_PHOTO="/home/admin/test.png";
long tempTime = System.currentTimeMillis();
public static final void main(String[] args){
QRScan qrScan = new QRScan();
String result=qrScan.decodeByZbar(PATH_PHOTO);
System.out.println("result:"+result);
Main main=new Main();
main.printTime("寻找二维码所用时间");
}
public void printTime(String time){
System.out.println(time+ (System.currentTimeMillis() - tempTime));
tempTime=System.currentTimeMillis();
}
}配置环境变量LD_LIBRARY_PATH指向so