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源码连接如下（含Qt，VS，Python）

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），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 
   
    #include 
    
     #include 
     
      #include 
      
       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
       
        (0,0);	SValue=(int)hsvSrc.at
        
         (0,1); VValue=(int)hsvSrc.at
         
          (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 ctypesimport sysif __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 
   
    namespace Ui {class Widget;}class Widget : public QWidget{    Q_OBJECTpublic:    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 
   
    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 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           #include 
           
            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"<
            
             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);}
            
           
          
         
        
       
      
     
    
   

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