//对比度和亮度设置 dConstrast[1-3]
int base::setContrastAndBright( string strFileName, double dConstrast, int nBright, QLabel* labelImage )
{
Mat matSource = imread(strFileName);
if (!matSource.data)
{
return(-1);
}
Mat matTemp = Mat::zeros(matSource.size(), matSource.type());
for(int nRow=0; nRow<matSource.rows; nRow++)
{
for(int nCol=0; nCol<matSource.cols; nCol++)
{
for (int nChannel=0; nChannel<matSource.channels(); nChannel++)
{
//像素点操作 saturate_cast<uchar> 控制值范围[0,255]
matTemp.at<Vec3b>(nRow, nCol)[nChannel] =
saturate_cast<uchar>(dConstrast * matSource.at<Vec3b>(nRow, nCol)[nChannel] + nBright);
}
}
}
return loadImg(matTemp, labelImage);
}
效果图
原图
