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图像处理之qt实现

分类： C/C++

2013-05-13 09:06:58

原文地址：图像处理之qt实现 作者：亦心亦翼

   申报了学校的新苗计划，主要是针对图像处理的。说实话，真心对图像处理不是很懂，所以最近一直处于充电学习阶段。通过这段时间的基础学习，作为一个图像处理方面的小菜鸟，还是想对图像处理谈一些自己的刍见。
  在我看来，作为图像处理的入门，会文件操作，能顺利得到图像的像素就足够了。但是在这方面做出成就就很难了，因为它涉及了很多算法，要做的出众就要有一定的创新就很难了。像海康这样做安防的，在视频方面做得之所以出众，就是因为他们在图像处理、画面处理方面的算法都有自己的创新。
   下面是这段时间，我关于图像处理方面的一些入门算法的实现代码，使用qt实现的，为自己后期实现图像处理（如：图像变形、分割等）做准备，代码分享如下：
 

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  1. #include \"mainwindow.h\"
  2. #include \"ui_mainwindow.h\"
  3. #include <QFileDialog>
  4. #include <QMovie>
  5. #include <QRgb>
  6. #include <math.h>
  7. #include <QInputDialog>
  8. #include <QDebug>
  9. #include <QDialog>
  10. #include <QDoubleSpinBox>
  11. #include <QSpinBox>
  12. #include <QLabel>

  14. MainWindow::MainWindow(QWidget *parent) :
  15.     QMainWindow(parent),
  16.     ui(new Ui::MainWindow)
  17. {
  18.     ui->setupUi(this);
  19.     QMenu *editMenu=ui->menuBar->addMenu(QObject::tr(\"图片(&P)\"));
  20.     QAction *action_Open=editMenu->addAction(QObject::tr(\"打开图片&O\"));
  21.     QMenu *editMenuMake=ui->menuBar->addMenu(QObject::tr(\"图像几何变换(&M)\"));
  22.     QAction *action_Make1=editMenuMake->addAction(QObject::tr(\"图像平移(&T)\"));
  23.     QAction *action_Make2=editMenuMake->addAction(QObject::tr(\"图像放缩(&S)\"));
  24.     QMenu *editMenuBetter=ui->menuBar->addMenu(QObject::tr(\"图像增强(&B)\"));
  25.     QAction *action_Better1=editMenuBetter->addAction(QObject::tr(\"图像锐化(&E)\"));
  26.     QAction *action_Better2=editMenuBetter->addAction(QObject::tr(\"直方图均衡化(&A)\"));
  27.     QAction *action_Better3=editMenuBetter->addAction(QObject::tr(\"消除噪声(&D)\"));
  28.     QMenu *editMenuTiqu=ui->menuBar->addMenu(QObject::tr(\"提取(&G)\"));
  29.     QAction *action_Gray=editMenuTiqu->addAction(QObject::tr(\"图像灰度化\"));
  30.     QAction *action_Get1=editMenuTiqu->addAction(QObject::tr(\"Sobel算子提取\"));
  31.     action_Open->setCheckable(true);
  32.     action_Make1->setCheckable(true);
  33.     action_Make2->setCheckable(true);
  34.     action_Better1->setCheckable(true);
  35.     action_Better2->setCheckable(true);
  36.     action_Better3->setCheckable(true);
  37.     action_Gray->setCheckable(true);
  38.     action_Get1->setCheckable(true);
  39.     connect(action_Open,SIGNAL(triggered()),this,SLOT(OpenPicture()));
  40.     connect(action_Make1,SIGNAL(triggered()),this,SLOT(SetChangeValue()));
  41.     connect(action_Make2,SIGNAL(triggered()),this,SLOT(SetSouValue()));
  42.     connect(action_Better1,SIGNAL(triggered()),this,SLOT(SetBetterValue()));
  43.     connect(action_Better2,SIGNAL(triggered()),this,SLOT(MakePicAverage()));
  44.     connect(action_Gray,SIGNAL(triggered()),this,SLOT(RgbToGray()));
  45.     connect(action_Get1,SIGNAL(triggered()),this,SLOT(SobelGet()));
  46.     connect(action_Better3,SIGNAL(triggered()),this,SLOT(SelectYanKind()));
  47. }

  49. MainWindow::~MainWindow()
  50. {
  51.     delete ui;
  52. }

  54. //获取要处理的图像并显示出来
  55. void MainWindow::OpenPicture()
  56. {
  57.     fileName=QFileDialog::getOpenFileName( this,tr(\"打开文件\"),\"/usr/local/Trolltech\",
  58.                                                    tr(\"任何文件(*.*)\"\";;文本文件(*.txt)\"\";;XML文件(*.xml)\"\";;Images (*.png *.xpm *.jpg)\"));
  59.     QMovie *move=new QMovie(fileName);
  60.     ui->label->move(50,100);
  61.     ui->label->setMovie(move);
  62.     move->start();
  63. }

  65. //确定图像左右、上下的平移量，并触发平移函数
  66. void MainWindow::SetChangeValue()
  67. {
  68.     dialog=new QDialog(this);
  69.     QLabel *WidthLabel=new QLabel(dialog);
  70.     WidthLabel->move(30,50);
  71.     WidthLabel->setText(tr(\"设置宽度的平移量\"));
  72.     setWidthChange=new QSpinBox(dialog);
  73.     setWidthChange->setMaximum(20);
  74.     setWidthChange->setMinimum(-20);
  75.     setWidthChange->move(180,50);
  76.     QLabel *HeightLabel=new QLabel(dialog);
  77.     HeightLabel->move(30,80);
  78.     HeightLabel->setText(tr(\"设置高度的平移量\"));
  79.     setHeightChange=new QSpinBox(dialog);
  80.     setHeightChange->setMaximum(20);
  81.     setHeightChange->setMinimum(-20);
  82.     setHeightChange->move(180,80);
  83.     QPushButton *button=new QPushButton(dialog);
  84.     button->move(180,120);
  85.     button->setText(tr(\"确定\"));
  86.     dialog->show();
  87.     connect(button,SIGNAL(clicked()),this,SLOT(ShowChangePic()));
  88. }
  89. //平移函数
  90. void MainWindow::ShowChangePic()
  91. {

  93.     image=new QImage(fileName);
  94.     QImage ChangeImage;
  95.     ChangeImage=QImage(image->width(),image->height(),QImage::Format_ARGB32);
  96.     QRgb rgb;
  97.     int width,height;
  98.     int i,j;
  99.     int widthOffset,heightOffset;
  100.     width=image->width();
  101.     height=image->height();
  102.     widthOffset=setWidthChange->value();
  103.     heightOffset=setHeightChange->value();
  104.     for(i=0;i<width;i++)
  105.     {
  106.         for(j=0;j<height;j++)
  107.         {
  108.             rgb=image->pixel(i,j);
  109.             if(ChangeImage.valid(i+widthOffset,j+heightOffset))
  110.             {
  111.                 ChangeImage.setPixel(i+widthOffset,j+heightOffset,rgb);
  112.             }
  113.         }
  114.      }
  115.      ui->label_2->resize(ChangeImage.width(),ChangeImage.height());
  116.      ui->label_2->setPixmap(QPixmap::fromImage(ChangeImage));
  117.      delete image;
  118.      delete dialog;
  119. }

  121. //设置图像伸缩的比例并触发伸缩函数
  122. void MainWindow::SetSouValue()
  123. {
  124.     dialog=new QDialog(this);
  125.     QLabel *WidthLabel=new QLabel(dialog);
  126.     WidthLabel->move(30,50);
  127.     WidthLabel->setText(tr(\"设置宽度的缩放比例\"));
  128.     setWidthBi=new QDoubleSpinBox(dialog);
  129.     setWidthBi->setMaximum(20);
  130.     setWidthBi->setMinimum(0.1);
  131.     setWidthBi->move(180,50);
  132.     QLabel *HeightLabel=new QLabel(dialog);
  133.     HeightLabel->move(30,80);
  134.     HeightLabel->setText(tr(\"设置高度的缩放比例\"));
  135.     setHeightBi=new QDoubleSpinBox(dialog);
  136.     setHeightBi->setMaximum(20);
  137.     setHeightBi->setMinimum(0.1);
  138.     setHeightBi->move(180,80);
  139.     QPushButton *button=new QPushButton(dialog);
  140.     button->move(180,120);
  141.     button->setText(tr(\"确定\"));
  142.     dialog->show();
  143.     connect(button,SIGNAL(clicked()),this,SLOT(ShowSouPic()));
  144. }
  145. //伸缩函数
  146. void MainWindow::ShowSouPic()
  147. {
  148.     int width,height;
  149.     image=new QImage(fileName);
  150.     width=image->width();
  151.     height=image->height();
  152.     double x,y,r1,r2,g1,g2,b1,b2;
  153.     int i,j;
  154.     double width_bi,height_bi;
  155.     QRgb rgb00,rgb01,rgb10,rgb11;
  156.     int r,g,b;
  157.     QImage SouImage;
  158.     width_bi=setWidthBi->value();
  159.     height_bi=setHeightBi->value();
  160.     SouImage=QImage(width*width_bi,height*height_bi,QImage::Format_ARGB32);
  161.     for(i=0;i<width*width_bi;i++)
  162.     {
  163.         for(j=0;j<height*height_bi;j++)
  164.         {
  165.             x=i*(1/width_bi);
  166.             y=j*(1/height_bi);

  168.             //边界采用单线性插值
  169.             if(ceil(x)==0&&ceil(y)!=0)
  170.             {
  171.                 rgb00=image->pixel(0,ceil(y)-1);
  172.                 rgb01=image->pixel(0,ceil(y));
  173.                 r=(ceil(y)-y)*qRed(rgb00)+(y-(ceil(y)-1))*qRed(rgb01);
  174.                 g=(ceil(y)-y)*qGreen(rgb00)+(y-(ceil(y)-1))*qGreen(rgb01);
  175.                 b=(ceil(y)-y)*qBlue(rgb00)+(y-(ceil(y)-1))*qBlue(rgb01);
  176.                 SouImage.setPixel(i,j,qRgb(r,g,b));
  177.             }

  179.             if(ceil(y)==0&&ceil(y)!=0)
  180.             {
  181.                 rgb00=image->pixel(ceil(x)-1,0);
  182.                 rgb10=image->pixel(ceil(x),0);
  183.                 r=(ceil(x)-x)*qRed(rgb00)+(x-(ceil(x)-1))*qRed(rgb10);
  184.                 g=(ceil(x)-x)*qGreen(rgb00)+(x-(ceil(x)-1))*qGreen(rgb10);
  185.                 b=(ceil(x)-x)*qBlue(rgb00)+(x-(ceil(x)-1))*qBlue(rgb10);
  186.                 SouImage.setPixel(i,j,qRgb(r,g,b));
  187.             }

  189.             //(0,0)点特殊处理
  190.             if(ceil(y)==0&&ceil(y)==0)
  191.             {
  192.                 rgb00=image->pixel(0,0);
  193.                 SouImage.setPixel(i,j,rgb00);
  194.             }

  196.             //非边界采用双线性插值
  197.             if(ceil(x)!=0&&ceil(y)!=0)
  198.             {
  199.                 rgb00=image->pixel(ceil(x)-1,ceil(y)-1);
  200.                 rgb01=image->pixel(ceil(x)-1,ceil(y));
  201.                 rgb10=image->pixel(ceil(x),ceil(y)-1);
  202.                 rgb11=image->pixel(ceil(x),ceil(y));

  204.                 r1=(ceil(x)-x)*qRed(rgb00)+(x-(ceil(x)-1))*qRed(rgb10);
  205.                 r2=(ceil(x)-x)*qRed(rgb01)+(x-(ceil(x)-1))*qRed(rgb11);
  206.                 r=(int)((ceil(y)-y)*r1+(y-(ceil(y)-1))*r2);

  208.                 g1=(ceil(x)-x)*qGreen(rgb00)+(x-(ceil(x)-1))*qGreen(rgb10);
  209.                 g2=(ceil(x)-x)*qGreen(rgb01)+(x-(ceil(x)-1))*qGreen(rgb11);
  210.                 g=(int)((ceil(y)-y)*g1+(y-(ceil(y)-1))*g2);

  212.                 b1=(ceil(x)-x)*qBlue(rgb00)+(x-(ceil(x)-1))*qBlue(rgb10);
  213.                 b2=(ceil(x)-x)*qBlue(rgb01)+(x-(ceil(x)-1))*qBlue(rgb11);
  214.                 b=(int)((ceil(y)-y)*b1+(y-(ceil(y)-1))*b2);

  216.                 SouImage.setPixel(i,j,qRgb(r,g,b));
  217.             }
  218.         }
  219.     }
  220.     ui->label_2->resize(SouImage.width(),SouImage.height());
  221.     ui->label_2->setPixmap(QPixmap::fromImage(SouImage));
  222.     delete image;
  223.     delete dialog;
  224. }

  226. //设置图像锐化的阈值并触发图像锐化函数
  227. void MainWindow::SetBetterValue()
  228. {
  229.     dialog=new QDialog(this);
  230.     QLabel *WidthLabel=new QLabel(dialog);
  231.     WidthLabel->move(30,50);
  232.     WidthLabel->setText(tr(\"设置锐化的阈值\"));
  233.     setBetterValue=new QSpinBox(dialog);
  234.     setBetterValue->setMaximum(100);
  235.     setBetterValue->setMinimum(10);
  236.     setBetterValue->move(180,50);
  237.     QPushButton *button=new QPushButton(dialog);
  238.     button->move(180,70);
  239.     button->setText(tr(\"确定\"));
  240.     dialog->show();
  241.     connect(button,SIGNAL(clicked()),this,SLOT(MakePicBetter()));
  242. }
  243. //图像锐化
  244. void MainWindow::MakePicBetter()
  245. {
  246.     image=new QImage(fileName);
  247.     QImage ImageBetter;
  248.     ImageBetter=QImage(image->width(),image->height(),QImage::Format_ARGB32);
  249.     int i,j;
  250.     int r,g,b,tmpR,tmpG,tmpB;
  251.     QRgb rgb00,rgb01,rgb10;
  252.     int width=image->width(),height=image->height();
  253.     int betterValue=setBetterValue->value();
  254.     for(i=0;i<width;i++)
  255.     {
  256.         for(j=0;j<height;j++)
  257.         {
  258.             if(image->valid(i,j)&&image->valid(i+1,j)&&image->valid(i,j+1))
  259.             {
  260.                 rgb00=image->pixel(i,j);
  261.                 rgb01=image->pixel(i,j+1);
  262.                 rgb10=image->pixel(i+1,j);
  263.                 r=qRed(rgb00);
  264.                 g=qGreen(rgb00);
  265.                 b=qBlue(rgb00);
  266.                 tmpR=abs(qRed(rgb00)-qRed(rgb01))+abs(qRed(rgb00)-qRed(rgb10));
  267.                 tmpG=abs(qGreen(rgb00)-qGreen(rgb01))+abs(qGreen(rgb00)-qGreen(rgb10));
  268.                 tmpB=abs(qBlue(rgb00)-qBlue(rgb01))+abs(qBlue(rgb00)-qBlue(rgb10));
  269.                 if((tmpR+120)<255)
  270.                 {
  271.                     if(tmpR>betterValue)
  272.                     {
  273.                         r=tmpR+120;
  274.                     }
  275.                 }
  276.                 else
  277.                 {
  278.                     r=255;
  279.                 }

  281.                 if((tmpG+120)<255)
  282.                 {
  283.                     if(tmpG>betterValue)
  284.                     {
  285.                         g=tmpG+120;
  286.                     }
  287.                 }
  288.                 else
  289.                 {
  290.                     g=255;
  291.                 }

  293.                 if((tmpB+120)<255)
  294.                 {
  295.                     if(tmpB>betterValue)
  296.                     {
  297.                         b=tmpB+120;
  298.                     }
  299.                 }
  300.                 else
  301.                 {
  302.                     b=255;
  303.                 }
  304.                 ImageBetter.setPixel(i,j,qRgb(r,g,b));
  305.         }
  306.         }
  307.     }
  308.     ui->label_2->resize(ImageBetter.width(),ImageBetter.height());
  309.     ui->label_2->setPixmap(QPixmap::fromImage(ImageBetter));
  310.     delete image;
  311.     delete dialog;
  312. }
  313. //图像的直方图均衡化
  314. void MainWindow::MakePicAverage()
  315. {
  316.     image=new QImage(fileName);
  317.     QImage ImageAverage;
  318.     ImageAverage=QImage(image->width(),image->height(),QImage::Format_ARGB32);
  319.     int i,j;
  320.     int width,height;
  321.     width=image->width();
  322.     height=image->height();
  323.     QRgb rgb;
  324.     int r[256],g[256],b[256];//原图各个灰度数量的统计
  325.     int rtmp,gtmp,btmp,rj,gj,bj;
  326.     float rPro[256],gPro[256],bPro[256];//原图各个灰度级的概率
  327.     float rTemp[256],gTemp[256],bTemp[256];//均衡化后各个灰度级的概率
  328.     int rJun[256],gJun[256],bJun[256];//均衡化后对应像素的值
  329.     memset(r,0,sizeof(r));
  330.     memset(g,0,sizeof(g));
  331.     memset(b,0,sizeof(b));

  333.     //获取原图各个灰度的数量
  334.     for(i=0;i<width;i++)
  335.     {
  336.         for(j=0;j<height;j++)
  337.         {
  338.             rgb=image->pixel(i,j);
  339.             r[qRed(rgb)]++;
  340.             g[qGreen(rgb)]++;
  341.             b[qBlue(rgb)]++;
  342.         }
  343.     }

  345.     //获取原图各个灰度级的概率
  346.     for(i=0;i<256;i++)
  347.     {
  348.         rPro[i]=(r[i]*1.0)/(width*height);
  349.         gPro[i]=(g[i]*1.0)/(width*height);
  350.         bPro[i]=(b[i]*1.0)/(width*height);
  351.     }

  353.     //均衡化后各个灰度级的概率，同时获取均衡化后对应像素的值
  354.     for(i=0;i<256;i++)
  355.     {
  356.         if(i==0)
  357.         {
  358.             rTemp[0]=rPro[0];
  359.             gTemp[0]=gPro[0];
  360.             bTemp[0]=bPro[0];
  361.         }
  362.         else
  363.         {
  364.             rTemp[i]=rTemp[i-1]+rPro[i];
  365.             gTemp[i]=gTemp[i-1]+gPro[i];
  366.             bTemp[i]=bTemp[i-1]+bPro[i];
  367.         }
  368.         rJun[i]=(int)(255*rTemp[i]+0.5);
  369.         gJun[i]=(int)(255*gTemp[i]+0.5);
  370.         bJun[i]=(int)(255*bTemp[i]+0.5);
  371.     }

  373.     for(i=0;i<width;i++)
  374.     {
  375.         for(j=0;j<height;j++)
  376.         {
  377.             rgb=image->pixel(i,j);
  378.             rtmp=qRed(rgb);
  379.             gtmp=qGreen(rgb);
  380.             btmp=qBlue(rgb);
  381.             rj=rJun[rtmp];
  382.             gj=gJun[gtmp];
  383.             bj=bJun[btmp];
  384.             ImageAverage.setPixel(i,j,qRgb(rj,gj,bj));
  385.         }
  386.     }
  387.     ui->label_2->resize(ImageAverage.width(),ImageAverage.height());
  388.     ui->label_2->setPixmap(QPixmap::fromImage(ImageAverage));
  389.     delete image;
  390. }

  392. //Sobel算子提取图像边界
  393. void MainWindow::SobelGet()
  394. {
  395.     image=new QImage(fileName);
  396.     QImage SobelIma;
  397.     SobelIma=QImage(image->width(),image->height(),QImage::Format_ARGB32);
  398.     Template(SobelIma);
  399.     ui->label_2->resize(SobelIma.width(),SobelIma.height());
  400.     ui->label_2->setPixmap(QPixmap::fromImage(SobelIma));
  401. }
  402. //与算子进行卷积的函数
  403. void MainWindow::Template(QImage &SobelImage)
  404. {
  405.     int width=image->width(),height=image->height();
  406.     int pixelNum=width*height;
  407.     int i,j,k,l;
  408.     float rResult,gResult,bResult;
  409.     float sobel1[9]={1,2,1,0,0,0,-1,-2,-1},sobel2[9]={1,0,-1,2,0,-2,1,0,-1};
  410.     QRgb pixelOld[pixelNum],pixelTemp1[pixelNum],pixelTemp2[pixelNum];
  411.     int rtmp,gtmp,btmp;
  412.     memset(pixelTemp1,255,pixelNum);
  413.     memset(pixelTemp2,255,pixelNum);
  414.     QRgb tmpRgb;
  415.     for(j=0;j<height;j++)
  416.     {
  417.         for(i=0;i<width;i++)
  418.         {
  419.             tmpRgb=image->pixel(i,j);
  420.             pixelOld[j*width+i]=tmpRgb;
  421.         }
  422.     }
  423.     for(j=1;j<height-1;j++)
  424.     {
  425.         for(i=1;i<width-1;i++)
  426.         {
  427.             rResult=0;
  428.             gResult=0;
  429.             bResult=0;
  430.             for(k=0;k<3;k++)
  431.             {
  432.                 for(l=0;l<3;l++)
  433.                 {
  434.                     rResult+=qRed(pixelOld[(j-1+k)*width+(i-1+l)])*sobel1[k*3+l];
  435.                     gResult+=qGreen(pixelOld[(j-1+k)*width+(i-1+l)])*sobel1[k*3+l];
  436.                     bResult+=qBlue(pixelOld[(j-1+k)*width+(i-1+l)])*sobel1[k*3+l];
  437.                 }
  438.             }
  439.             rResult=(float)fabs(rResult);
  440.             gResult=(float)fabs(gResult);
  441.             bResult=(float)fabs(bResult);
  442.             if(rResult>255)
  443.             {
  444.                 rtmp=255;
  445.             }
  446.             else
  447.                 rtmp=(int)(rResult+0.5);
  448.             if(gResult>255)
  449.                 gtmp=255;
  450.             else
  451.                 gtmp=(int)(gResult+0.5);
  452.             if(bResult>255)
  453.                 btmp=255;
  454.             else
  455.                 btmp=(int)(bResult+0.5);
  456.             pixelTemp1[j*width+i]=qRgb(rtmp,gtmp,btmp);
  457.         }
  458.     }

  460.     for(j=1;j<height-1;j++)
  461.     {
  462.         for(i=1;i<width-1;i++)
  463.         {
  464.             rResult=0;
  465.             gResult=0;
  466.             bResult=0;
  467.             for(k=0;k<3;k++)
  468.             {
  469.                 for(l=0;l<3;l++)
  470.                 {
  471.                     rResult+=qRed(pixelOld[(j-1+k)*width+(i-1+l)])*sobel2[k*3+l];
  472.                     gResult+=qGreen(pixelOld[(j-1+k)*width+(i-1+l)])*sobel2[k*3+l];
  473.                     bResult+=qBlue(pixelOld[(j-1+k)*width+(i-1+l)])*sobel2[k*3+l];
  474.                 }
  475.             }
  476.             rResult=(float)fabs(rResult);
  477.             gResult=(float)fabs(gResult);
  478.             bResult=(float)fabs(bResult);
  479.             if(rResult>255)
  480.                 rtmp=255;
  481.             else
  482.                 rtmp=(int)(rResult+0.5);
  483.             if(gResult>255)
  484.                 gtmp=255;
  485.             else
  486.                 gtmp=(int)(gResult+0.5);
  487.             if(bResult>255)
  488.                 btmp=255;
  489.             else
  490.                 btmp=(int)(bResult+0.5);
  491.             pixelTemp2[j*width+i]=qRgb(rtmp,gtmp,btmp);
  492.         }
  493.     }

  495.     for(i=0;i<pixelNum;i++)
  496.     {
  497.         if(pixelTemp2[i]>pixelTemp1[i])
  498.             pixelTemp1[i]=pixelTemp2[i];
  499.     }
  500.     for(j=0;j<height;j++)
  501.     {
  502.         for(i=0;i<width;i++)
  503.         {
  504.             SobelImage.setPixel(i,j,pixelTemp1[j*width+i]);
  505.         }
  506.     }
  507.     delete[] pixelTemp1;
  508.     delete[] pixelTemp2;
  509.     delete image;
  510. }

  512. //设置图像平滑的方法
  513. void MainWindow::SelectYanKind()
  514. {
  515.     dialog=new QDialog(this);
  516.     QLabel *Label=new QLabel(dialog);
  517.     Label->move(45,20);
  518.     Label->setText(tr(\"设置图像平滑的方法\"));
  519.     QLabel *DescLabel=new QLabel(dialog);
  520.     DescLabel->move(60,45);
  521.     DescLabel->setText(tr(\" 1--邻域平均法\\n 2--加权平均法\\n 3--选择式掩膜平滑\\n\"));
  522.     setKind=new QSpinBox(dialog);
  523.     setKind->setMaximum(3);
  524.     setKind->setMinimum(1);
  525.     setKind->move(65,100);
  526.     QPushButton *button=new QPushButton(dialog);
  527.     button->move(65,130);
  528.     button->setText(tr(\"确定\"));
  529.     dialog->show();
  530.     connect(button,SIGNAL(clicked()),this,SLOT(DecreseVoice()));
  531. }
  532. //将图像的像素信息存在缓存中，并通过调用图像平滑函数更改缓存中的信息
  533. void MainWindow::DecreseVoice()
  534. {
  535.     image=new QImage(fileName);
  536.     int i,j,k,num;
  537.     int width=image->width(),height=image->height();
  538.     QImage MoreClear;
  539.     MoreClear=QImage(width,height,QImage::Format_ARGB32);
  540.     num=width*height;
  541.     QRgb tmpPixel[num];
  542.     int yanKind=setKind->value();
  543.     for(i=0;i<width;i++)
  544.     {
  545.         for(j=0;j<height;j++)
  546.         {
  547.             k=i*height+j;
  548.             tmpPixel[k]=image->pixel(i,j);
  549.         }
  550.     }
  551.     MoreClearPic(tmpPixel,yanKind,width,height);
  552.     for(i=0;i<width;i++)
  553.     {
  554.         for(j=0;j<height;j++)
  555.         {
  556.             k=i*height+j;
  557.             MoreClear.setPixel(i,j,tmpPixel[k]);
  558.         }
  559.     }
  560.     ui->label_2->resize(width,height);
  561.     ui->label_2->setPixmap(QPixmap::fromImage(MoreClear));
  562.     delete dialog;
  563. }
  564. //，图形平滑函数，它通过调用相应的平滑化函数实现图像的不同平滑化
  565. void MainWindow::MoreClearPic(QRgb *tmpPixel,int yanKind,int width,int height)
  566. {
  567.     int i,j,k;
  568.     int num=width*height;
  569.     int rtmpPixel[num],gtmpPixel[num],btmpPixel[num];
  570.     for(i=0;i<width;i++)
  571.     {
  572.        for(j=0;j<height;j++)
  573.        {
  574.            k=i*height+j;
  575.            rtmpPixel[k]=qRed(tmpPixel[k]);
  576.            gtmpPixel[k]=qGreen(tmpPixel[k]);
  577.            btmpPixel[k]=qBlue(tmpPixel[k]);
  578.        }
  579.     }
  580.     if(yanKind==1)
  581.     {
  582.         YanMo1(rtmpPixel,width,height);
  583.         YanMo1(gtmpPixel,width,height);
  584.         YanMo1(btmpPixel,width,height);
  585.     }
  586.     if(yanKind==2)
  587.     {
  588.         YanMo2(rtmpPixel,width,height);
  589.         YanMo2(gtmpPixel,width,height);
  590.         YanMo2(btmpPixel,width,height);
  591.     }
  592.     /*if(yanKind==3)
  593.     {
  594.         YanMo3(rtmpPixel,width,height);
  595.         YanMo3(gtmpPixel,width,height);
  596.         YanMo3(btmpPixel,width,height);
  597.     }*/
  598.     for(i=1;i<width-1;i++)
  599.     {
  600.         for(j=1;j<height-1;j++)
  601.         {
  602.             k=i*height+j;
  603.             tmpPixel[k]=qRgb(rtmpPixel[k],gtmpPixel[k],btmpPixel[k]);
  604.         }
  605.     }
  606. }
  607. //邻域平均法平滑化函数
  608. void MainWindow::YanMo1(int *tmpPixel, int width, int height)
  609. {
  610.     float Template[9]={1.0/9,1.0/9,1.0/9,1.0/9,1.0/9,1.0/9,1.0/9,1.0/9,1.0/9};
  611.     int i,j;
  612.     for(i=1;i<width-1;i++)
  613.     {
  614.        for(j=1;j<height-1;j++)
  615.        {
  616.          tmpPixel[i*height+j]=tmpPixel[(i-1)*height+j-1]*Template[0]+tmpPixel[(i-1)*height+j]*Template[1]+
  617.          tmpPixel[(i-1)*height+j+1]*Template[2]+tmpPixel[i*height+j-1]*Template[3]+tmpPixel[i*height+j]*Template[4]
  618.          +tmpPixel[i*height+j+1]*Template[5]+tmpPixel[(i+1)*height+j-1]*Template[6]+tmpPixel[(i+1)*height+j]*Template[7]
  619.          +tmpPixel[(i+1)*height+j+1]*Template[8];
  620.        }
  621.     }
  622. }
  623. //加权平均法平滑化函数
  624. void MainWindow::YanMo2(int *tmpPixel, int width, int height)
  625. {
  626.     float Template[9]={1.0/16,2.0/16,1.0/16,2.0/16,4.0/16,2.0/16,1.0/16,2.0/16,1.0/16};
  627.     int i,j;
  628.     for(i=1;i<width-1;i++)
  629.     {
  630.        for(j=1;j<height-1;j++)
  631.        {
  632.          tmpPixel[i*height+j]=tmpPixel[(i-1)*height+j-1]*Template[0]+tmpPixel[(i-1)*height+j]*Template[1]+
  633.          tmpPixel[(i-1)*height+j+1]*Template[2]+tmpPixel[i*height+j-1]*Template[3]+tmpPixel[i*height+j]*Template[4]
  634.          +tmpPixel[i*height+j+1]*Template[5]+tmpPixel[(i+1)*height+j-1]*Template[6]+tmpPixel[(i+1)*height+j]*Template[7]
  635.          +tmpPixel[(i+1)*height+j+1]*Template[8];
  636.        }
  637.     }
  638. }


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