实现了2种比值法计算云量

cloudage.cpp

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+#include "cloudage.h"
+
+
+Cloudage::Cloudage(int radius)
+{
+    m_iRadius = radius;
+}
+
+void Cloudage::setRadius(int radius)
+{
+    m_iRadius = radius;
+}
+
+QImage Cloudage::readImage(QString imagePath)
+{
+    QImage qImage;
+    qImage.load(imagePath);
+
+    m_qImgPath = imagePath;
+
+    return qImage;
+}
+
+QImage Cloudage::createGrayscaleImage(int width, int height)
+{
+    QImage grayscaleImage(width, height, QImage::Format_Indexed8);//提问：如果使用QImage::Format_Grayscale8怎么实现？
+    QVector<QRgb> grayTable;        //设置颜色表
+    for (int i = 0; i < 256; i++)
+        grayTable.push_back(qRgb(i, i, i));
+    grayscaleImage.setColorTable(grayTable);
+
+    return grayscaleImage;
+}
+
+void Cloudage::getPosOfCenterpixel(int width, int height, int &widthCenter,int &heightCenter)
+{
+    widthCenter = width/2;
+    heightCenter = height/2;
+}
+
+bool Cloudage::isValidPos(int x1, int y1, int x2, int y2)
+{
+    float tmp =pow((x1 - x2), 2) + pow((y1 - y2), 2);
+    float distance = sqrt(tmp);
+
+    if(distance > m_iRadius)
+        return false;
+    else
+        return true;
+}
+
+float Cloudage::getcloudage1(QImage image, bool saveBinaryImg)
+{
+    int width=image.width();
+    int height=image.height();
+
+    int widthCenter;
+    int heightCenter;
+    getPosOfCenterpixel(width,height,widthCenter,heightCenter);
+
+    QImage cloudQImage = createGrayscaleImage(width, height);
+
+
+//    int cloudInt[width][height] = {0};//错误：不能用变量在栈上定义数组 → 只能定义在堆上！
+
+    //申请空间
+    int** cloudInt = new int*[width];
+    for(int i=0;i<width;i++)
+        cloudInt[i] = new int[height];
+
+    //云点识别
+    float cloudPixelCounter = 0;
+    float totalPixelCountor = 0;
+    for(int i=0;i<width;i++)
+    {
+        for(int j=0;j<height;j++)
+        {
+            if(!isValidPos(i,j,widthCenter,heightCenter))//判断是否在有效半径内，如果不在就不统计
+            {
+                cloudQImage.setPixel(i,j,0);
+                continue;
+            }
+
+            totalPixelCountor++;
+
+            QColor pixelTmp = image.pixelColor(i,j);
+
+            float red = (float)pixelTmp.red();
+            float blue = (float)pixelTmp.blue();
+            float rate = red/blue;
+
+            if(rate>0.6)
+            {
+                cloudQImage.setPixel(i,j,255);
+                cloudInt[i][j] = 1;
+                cloudPixelCounter++;
+            }
+            else
+            {
+                cloudQImage.setPixel(i,j,150);
+            }
+        }
+    }
+
+    //计算云量
+    float cloudage = cloudPixelCounter / totalPixelCountor;
+
+    if(saveBinaryImg)
+    {
+        QStringList imgPathTMP = m_qImgPath.split(".");
+        QString name = imgPathTMP[0] + "_BinaryImg_ratio1." + imgPathTMP[1];
+        cloudQImage.save(name);
+    }
+
+
+    //释放空间
+    for(int i=0;i<width;i++)
+        delete []cloudInt[i];
+    delete []cloudInt;
+
+    return cloudage;
+}
+
+float Cloudage::getcloudage2(QImage image, bool saveBinaryImg)
+{
+    int width=image.width();
+    int height=image.height();
+
+    int widthCenter;
+    int heightCenter;
+    getPosOfCenterpixel(width,height,widthCenter,heightCenter);
+
+    QImage cloudQImage = createGrayscaleImage(width, height);
+
+
+//    int cloudInt[width][height] = {0};//错误：不能用变量在栈上定义数组 → 只能定义在堆上！
+
+    //申请空间
+    int** cloudInt = new int*[width];
+    for(int i=0;i<width;i++)
+        cloudInt[i] = new int[height];
+
+    //云点识别
+    float cloudPixelCounter = 0;
+    float totalPixelCountor = 0;
+    for(int i=0;i<width;i++)
+    {
+        for(int j=0;j<height;j++)
+        {
+            if(!isValidPos(i,j,widthCenter,heightCenter))//判断是否在有效半径内，如果不在就不统计
+            {
+                cloudQImage.setPixel(i,j,0);
+                continue;
+            }
+
+            totalPixelCountor++;
+
+            QColor pixelTmp = image.pixelColor(i,j);
+
+            float red = (float)pixelTmp.red();
+            float blue = (float)pixelTmp.blue();
+            float rate = (blue - red) / (blue + red);
+
+            if(rate<0.2)
+            {
+                cloudQImage.setPixel(i,j,255);
+                cloudInt[i][j] = 1;
+                cloudPixelCounter++;
+            }
+            else
+            {
+                cloudQImage.setPixel(i,j,150);
+            }
+        }
+    }
+
+    //计算云量
+    float cloudage = cloudPixelCounter / totalPixelCountor;
+
+    if(saveBinaryImg)
+    {
+        QStringList imgPathTMP = m_qImgPath.split(".");
+        QString name = imgPathTMP[0] + "_BinaryImg_ratio2." + imgPathTMP[1];
+        cloudQImage.save(name);
+    }
+
+
+    //释放空间
+    for(int i=0;i<width;i++)
+        delete []cloudInt[i];
+    delete []cloudInt;
+
+    return cloudage;
+}