一,原图:
二,代码:
//13羽化
float mSize = 0.5;
void Feathering()
{
Mat src = imread("D:\\test\\lena.jpg");
imshow("src", src);
int width = src.cols;
int heigh = src.rows;
int centerX = width >> 1;
int centerY = heigh >> 1;
int maxV = centerX*centerX + centerY*centerY;
int minV = (int)(maxV*(1 - mSize));
int diff = maxV - minV;
float ratio = width >heigh ? (float)heigh / (float)width : (float)width / (float)heigh;
Mat img;
src.copyTo(img);
Scalar avg = mean(src);
Mat dst(img.size(), CV_8UC3);
Mat mask1u[3];
float tmp, r;
for (int y = 0; y<heigh; y++)
{
uchar* imgP = img.ptr<uchar>(y);
uchar* dstP = dst.ptr<uchar>(y);
for (int x = 0; x<width; x++)
{
int b = imgP[3 * x];
int g = imgP[3 * x + 1];
int r = imgP[3 * x + 2];
float dx = centerX - x;
float dy = centerY - y;
if (width > heigh)
dx = (dx*ratio);
else
dy = (dy*ratio);
int dstSq = dx*dx + dy*dy;
float v = ((float)dstSq / diff) * 255;
r = (int)(r + v);
g = (int)(g + v);
b = (int)(b + v);
r = (r>255 ? 255 : (r<0 ? 0 : r));
g = (g>255 ? 255 : (g<0 ? 0 : g));
b = (b>255 ? 255 : (b<0 ? 0 : b));
dstP[3 * x] = (uchar)b;
dstP[3 * x + 1] = (uchar)g;
dstP[3 * x + 2] = (uchar)r;
}
}
imshow("羽化", dst);
waitKey();
imwrite("D://羽化.jpg", dst);
}
//-----开始------
void COpenCVLearningDlg::OnBnClickedStartButton()
{
Feathering();
}
三,结果:
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原文地址:https://blog.csdn.net/sangni007/column/info/stylizefliter