解决libpng warning: iCCP: known incorrect sRGB profile问题

问题：

最近用qt写的程序加载PNG格式的图片时会有“libpng warning: iCCP: known incorrect sRGB profile”的警告

在网上看到了解决方法就是用QImage加载一下然后再保存就行了，但是没有对应的代码，所以今天就自己写了一下

//是同名100%保存

//工程地址：http://download.csdn.net/detail/lbb2016/9659052

下面贴上源码

#include "dialog.h"
#include "ui_dialog.h"
#include

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
    img =new QImage;
}

Dialog::~Dialog()
{
    delete img;
    delete ui;
}

void Dialog::on_pushButton_Judge_clicked()
{
    QString imgPath;
    imgPath=QFileDialog::getOpenFileName(this, tr("Open Image"), ".", tr("Image Files(*.jpg *.png)"));
    img->load(imgPath);
    ui->label_img->setPixmap(QPixmap::fromImage(*img));
    ImgJudge(img);
}
void Dialog::ImgJudge(QImage *img)
{
    int countC=0,countT=0;
    QImage scaledImg;
    scaledImg=img->scaled(40,80, Qt::IgnoreAspectRatio);

    QRgb *colorC;
    QRgb *colorT;
    colorC=(QRgb *)scaledImg.scanLine(25);
    colorT=(QRgb *)scaledImg.scanLine(55);
    for(int i=0;i150&&qGreen(colorC[i])<150&&qBlue(colorC[i])<150)
            countC++;
        if(qRed(colorT[i])>150&&qGreen(colorT[i])<150&&qBlue(colorT[i])<150)
            countT++;
    }
    if(countC>30&&countT>30){
        ui->label_CResult->setText("1");
        ui->label_TResult->setText("1");
    }
    else if(countT>30){
        ui->label_CResult->setText("0");
        ui->label_TResult->setText("1");
    }
    else if(countC>30){
        ui->label_CResult->setText("1");
        ui->label_TResult->setText("0");
    }
    else{
        ui->label_CResult->setText("0");
        ui->label_TResult->setText("0");
    }
}