在win和android上同时进行OpenCV程序设计 _android

【在win和android上同时进行OpenCV程序设计】寸阳分阴须爱惜，休负春色与时光。这篇文章主要讲述在win和android上同时进行OpenCV程序设计相关的知识，希望能为你提供帮助。
基于qt进行android图像处理项目设计的时候，初期可以首先在windows上进行调试，等到比较成熟后将代码转换到adnroid上。这里仅以widget为例，如果使用qtquick是一样的。具体以下几步：1、项目创建的时候，选择android和desktop两类（前提是安装的时候已经都选择了）

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这样，在程序设计的过程中，我们就可以通过切换来进行选择

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如果对于已经配置好kti（构建套件）的项目，可以先删除目录下的.pro.user文件，而后重新打开项目，则自动跳出构建套件配置界面

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2、配置文件：对配置文件的修改是主要知识点所在，首先在不同平台下，要填写不同的前缀。对于pc平台是win32 {……}对于Android平台是android {……}大小写不可写错，此外就是OpenCV基础环境的配置。对于pc平台需要做的是配置系统路径、设置include和lib路径；对于Android平台需要做的是设置include和lib路径，并且将libopencv_java3.so拷贝到最后的.apk中去。参考的配置文件如下，其中重要的部分已经加粗。

QT += quick
QT += multimedia
CONFIG += c++11

win32 {
message("当前使用PC配置")
WIN32_OPENCV = D:/JsxyheluOpenCV/New-QT-dll/install
INCLUDEPATH += \\
$$WIN32_OPENCV/include/opencv \\
$$WIN32_OPENCV/include/opencv2 \\
$$WIN32_OPENCV/include
LIBS += \\
$$WIN32_OPENCV/x86/mingw/lib/libopencv_core320.dll.a\\$$WIN32_OPENCV/x86/mingw/lib/libopencv_highgui320.dll.a\\
$$WIN32_OPENCV/x86/mingw/lib/libopencv_imgproc320.dll.a\\
$$WIN32_OPENCV/x86/mingw/lib/libopencv_imgcodecs320.dll.a\\
$$WIN32_OPENCV/x86/mingw/lib/libopencv_highgui320.dll.a\\
$$WIN32_OPENCV/x86/mingw/lib/libopencv_videoio320.dll.a
}
android {
message("当前使用Android配置")
ANDROID_OPENCV = D:/OpenCV-android-sdk/sdk/native
INCLUDEPATH += \\
$$ANDROID_OPENCV/jni/include/opencv \\
$$ANDROID_OPENCV/jni/include/opencv2 \\
$$ANDROID_OPENCV/jni/include \\
LIBS += \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_ml.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_objdetect.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_calib3d.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_video.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_features2d.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_highgui.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_flann.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_imgproc.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_core.a \\
$$ANDROID_OPENCV/3rdparty/libs/armeabi-v7a/liblibjpeg.a \\
$$ANDROID_OPENCV/3rdparty/libs/armeabi-v7a/liblibpng.a \\
$$ANDROID_OPENCV/3rdparty/libs/armeabi-v7a/liblibtiff.a \\
$$ANDROID_OPENCV/3rdparty/libs/armeabi-v7a/liblibjasper.a \\
$$ANDROID_OPENCV/3rdparty/libs/armeabi-v7a/libtbb.a \\
$$ANDROID_OPENCV/3rdparty/libs/armeabi-v7a/libtegra_hal.a \\
$$ANDROID_OPENCV/libs/armeabi-v7a/libopencv_java3.so
}

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

SOURCES += main.cpp \\
todocpp.cpp \\
calibration.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator\'s code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

HEADERS += \\
todocpp.h \\
calibration.h

DISTFILES += \\
android/AndroidManifest.xml \\
android/gradle/wrapper/gradle-wrapper.jar \\
android/gradlew \\
android/res/values/libs.xml \\
android/build.gradle \\
android/gradle/wrapper/gradle-wrapper.properties \\
android/gradlew.bat 


contains(ANDROID_TARGET_ARCH,armeabi-v7a) {
ANDROID_EXTRA_LIBS = \\
D:/OpenCV-android-sdk/sdk/native/libs/armeabi-v7a/libopencv_java3.so
}
ANDROID_PACKAGE_SOURCE_DIR = $$PWD/android

并设置正确的环境变量（如何在Windows和Android平台下编译OpenCV请参考博客中其它博文）

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3、编写界面和代码为说明方便，在简单的widget上面显示一个自己生成的圆。其中圆的生成和最终显示都调用OpenCV代码。那么如果这个是成功的，则证明OpenCV环境配置正确。

#include "mainwindow.h"
#include "ui_mainwindow.h"
using namespace cv;

Mat tmp;

MainWindow::MainWindow(QWidget *parent) :
 
  
 QMainWindow(parent),
 
  
 ui(new Ui::MainWindow)
{
 
  
 ui->
setupUi(this);

}

MainWindow::~MainWindow()
{
 
  
 delete ui;

}

void MainWindow::on_pushButton_pressed()
{
 
  
 Mat src(Size(640,480),CV_8UC1,cv::Scalar(255));

 
  
 circle(src,Point(100,100),100,Scalar(0),-1);

 
  
 // 格式转换
 
  
 QPixmap qpixmap = Mat2QImage(src);

 
  
 // 将图片显示到label上
 
  
 ui->
label->
setPixmap(qpixmap);

}

//格式转换
QPixmap Mat2QImage(Mat src)
{
 
  
 QImage img;

 
  
 //根据QT的显示方法进行转换
 
  
 if(src.channels() == 3)
 
  
 {
 
  
  
  
 cvtColor( src, tmp, CV_BGR2RGB );

 
  
  
  
 img = QImage( (const unsigned char*)(tmp.data), tmp.cols, tmp.rows, QImage::Format_RGB888 );

 
  
 }
 
  
 else
 
  
 {
 
  
  
  
 img = QImage( (const unsigned char*)(src.data), src.cols, src.rows, QImage::Format_Grayscale8 );

 
  
 }
 
  
 QPixmap qimg = QPixmap::fromImage(img) ;

 
  
 return qimg;

}