OpenCV之怀旧色、冰冻滤镜、熔铸滤镜

怀旧色

源码：

void huaijiu(Mat& src,Mat& dst)
{
    for (int h = 0;h < src.rows;h ++)
    {
        uchar *d1 = src.ptr<uchar>(h);
        uchar *d2 = dst.ptr<uchar>(h);
        for (int w = 0;w < src.cols;w ++)
        {
            int w3 = 3*w;
            int r =  d1[w3 + 2];
            int g = d1[w3 + 1];
            int b = d1[w3 + 0];
            int AR =(int)(0.393*r + 0.769*g + 0.189*b);
            int AG =(int)(0.349*r + 0.686*g + 0.168*b);
            int AB =(int)(0.272*r + 0.534*g + 0.131*b);
            AR = AR > 255 ? 255 : AR;
            AG = AG > 255 ? 255 : AG;
            AB = AB > 255 ? 255  : AB;
 
            d2[w3 + 2] = AR;
            d2[w3 + 1] = AG;
            d2[w3 + 0] = AB;
        }
    }
 
}

原图： 

冰冻滤镜

void bingdong(Mat& src,Mat& dst)
{
    for (int h = 0;h < src.rows;h ++)
    {
        uchar *d1 = src.ptr<uchar>(h);
        uchar *d2 = dst.ptr<uchar>(h);
        for (int w = 0;w < src.cols;w ++)
        {
            int w3 = 3*w;
            int r =  d1[w3 + 2];
            int g = d1[w3 + 1];
            int b = d1[w3 + 0];
 
            int AR =(r - b - g)*3/2;
            int AG =(g - b - r)*3/2;
            int AB =(b - r - g)*3/2;
 
            AR = AR > 255 ? 255 : AR;
            AG = AG > 255 ? 255 : AG;
            AB = AB > 255 ? 255  : AB;
 
            d2[w3 + 2] = AR;
            d2[w3 + 1] = AG;
            d2[w3 + 0] = AB;
        }
    }
}

熔铸滤镜

void rongzhu(Mat& src,Mat& dst)
{
    for (int h = 0;h < src.rows;h ++)
    {
        uchar *d1 = src.ptr<uchar>(h);
        uchar *d2 = dst.ptr<uchar>(h);
        for (int w = 0;w < src.cols;w ++)
        {
            int w3 = 3*w;
            int r =  d1[w3 + 2];
            int g = d1[w3 + 1];
            int b = d1[w3 + 0];
 
            int AR = r * 128 / (b+g+1);
            int AG = g*128 / (b+r+1);
            int AB = b*128 / (r+g+1);
 
            AR = AR > 255 ? 255 : AR;
            AG = AG > 255 ? 255 : AG;
            AB = AB > 255 ? 255  : AB;
 
            d2[w3 + 2] = AR;
            d2[w3 + 1] = AG;
            d2[w3 + 0] = AB;
        }
    }
}