C/C++,Qt,Python,OpenCV小项目实战-实时桌面颜色查询

源码连接如下（含Qt，VS，Python）

https://download.csdn.net/download/qq78442761/10723417

 

程序运行截图如下：

（原理）逻辑如下：

1.使用VS2012以及OpenCV3，编写识别颜色的算法，传入一个图像（只有一个像素（鼠标当前像素）），识别这个像素是什么颜色（识别原理在此不说，原理在这篇连接里面https://blog.csdn.net/qq78442761/article/details/83056346），把程序做成C接口的dll。

2.使用Python调用算法dll，并且接收返回过来的值

3.使用Qt截取当前鼠标的像素点，调用Python进行分析，并且获取返回值。

 

程序源码如下：

VS2012 OpenCV的重点代码：

#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/imgproc/imgproc_c.h>
 
using namespace cv;
 
extern "C"__declspec(dllexport) char* getColorName(char *FileName){
	char *colorName;
 
	Mat matSrc=imread(FileName,IMREAD_UNCHANGED);
	Mat hsvSrc;
	cvtColor(matSrc,hsvSrc,COLOR_BGR2HSV);
 
	int HValue,SValue,VValue;
	HValue=(int)hsvSrc.at<uchar>(0,0);
	SValue=(int)hsvSrc.at<uchar>(0,1);
	VValue=(int)hsvSrc.at<uchar>(0,2);
 
	if((HValue>=0&&HValue<=180)
		&&(SValue>=0&&SValue<=255)
		&&(VValue>=0&&VValue<=46)){
 
			colorName="黑";
	}
	else if((HValue>=0&&HValue<=180)
		&&(SValue>=0&&SValue<=43)
		&&(VValue>=46&&VValue<=220)){
 
			colorName="灰";
	}
	else if((HValue>=0&&HValue<=180)
		&&(SValue>=0&&SValue<=30)
		&&(VValue>=221&&VValue<=255)){
 
			colorName="白";
	}
	else if(((HValue>=0&&HValue<=10)||(HValue>=156&&HValue<=180))
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="红";
 
	}
	else if((HValue>=11&&HValue<=25)
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="橙";
	}
	else if((HValue>=26&&HValue<=34)
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="黄";
	}
	else if((HValue>=35&&HValue<=77)
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="绿";
	}
	else if((HValue>=78&&HValue<=99)
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="青";
	}
	else if((HValue>=100&&HValue<=124)
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="蓝";
	}
	else if((HValue>=125&&HValue<=155)
		&&(SValue>=43&&SValue<=255)
		&&(VValue>=46&&VValue<=255)){
 
			colorName="紫";
	}
	else{
 
		colorName="未知";
	}
 
 
	return colorName;
}

 

胶水Python的源码：

import ctypes
import sys
 
if __name__=='__main__':
	
	fileName=str(sys.argv[1])
	ll=ctypes.cdll.LoadLibrary   
	lib =ll("judgeColor.dll")    
	charPointer=bytes(fileName,"gbk")
	result=lib.getColorName(charPointer)
	pyResult=ctypes.string_at(result);
	result=pyResult.decode("gbk")
	print(result)
	pass

 

Qt源码如下：

widget.h

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
 
 
namespace Ui {
class Widget;
}
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
 
protected slots:
    void printMousePoint();
 
protected:
    void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
    void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
    void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
 
 
private:
    Ui::Widget *ui;
 
    bool m_dragging;
    bool m_isRunning;
    QPoint m_startPosition;
    QPoint m_framePosition;
};
 
#endif // WIDGET_H

main.cpp

#include "widget.h"
#include <QApplication>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
 
    return a.exec();
}

widget.cpp

#include "widget.h"
#include "ui_widget.h"
 
#include <QDebug>
 
#include <QProcess>
#include <QTimer>
#include <QPixmap>
#include <QWindow>
#include <QMouseEvent>
#include <QEventLoop>
#include <QScreen>
#include <windows.h>
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    setMouseTracking(true);
 
    QTimer *timer=new QTimer;
    connect(timer,SIGNAL(timeout()),this,SLOT(printMousePoint()));
    timer->start(20);
    setWindowFlags(Qt::WindowStaysOnTopHint|Qt::Window|Qt::FramelessWindowHint);
    setAttribute(Qt::WA_TranslucentBackground);
    m_dragging=false;
    m_isRunning=false;
}
 
Widget::~Widget()
{
    delete ui;
}
 
 
void Widget::printMousePoint()
{
    POINT p;
    if(GetCursorPos(&p)&&!m_isRunning){
 
        QWindow *window=windowHandle();
        QScreen *screen=window->screen();
        QPixmap pixmap=screen->grabWindow(0,(int)p.x,(int)p.y,1,1);
        QString filePath=qApp->applicationDirPath()+"/1.png";
        pixmap.save(filePath);
 
        QProcess p(0);
        QString cmdString="python "+qApp->applicationDirPath()+"/demo.py "+qApp->applicationDirPath()+"/1.png";
        m_isRunning=true;
        p.start("cmd", QStringList()<<"/c"<<cmdString);
        //p.waitForStarted();
        //p.waitForFinished();
        QEventLoop loop;
        connect(&p,SIGNAL(finished(int,QProcess::ExitStatus)),&loop,SLOT(quit()));
        loop.exec();
        QString strTemp=QString::fromLocal8Bit(p.readAllStandardOutput());
        strTemp=strTemp.left(1);
        ui->label->setText(strTemp);
        m_isRunning=false;
    }
}
 
 
void Widget::mouseMoveEvent(QMouseEvent *event)
{
    if(event->buttons()&Qt::LeftButton){
        if(m_dragging){
            QPoint delta=event->globalPos()-m_startPosition;
            move(m_framePosition+delta);
        }
    }
    QWidget::mouseMoveEvent(event);
}
 
void Widget::mousePressEvent(QMouseEvent *event)
{
    if(event->button()==Qt::LeftButton){
        m_dragging=true;
        m_startPosition=event->globalPos();
        m_framePosition=frameGeometry().topLeft();
    }
    QWidget::mousePressEvent(event);
}
 
void Widget::mouseReleaseEvent(QMouseEvent *event)
{
    m_dragging=false;
    QWidget::mouseReleaseEvent(event);
}