OpenCV_10怀旧色 & 连环画 & 熔铸 & 冰冻

1，原图：

2.1，怀旧代码：

//10怀旧色 & 连环画 & 熔铸 & 冰冻
void Nostalgic()
{
	Mat src = imread("D:\\test\\66.jpg");
	int width = src.cols;
	int heigh = src.rows;
	RNG rng;
	Mat img(src.size(), CV_8UC3);
	for (int y = 0; y<heigh; y++)
	{
		uchar* P0 = src.ptr<uchar>(y);
		uchar* P1 = img.ptr<uchar>(y);
		for (int x = 0; x<width; x++)
		{
			float B = P0[3 * x];
			float G = P0[3 * x + 1];
			float R = P0[3 * x + 2];
			float newB = 0.272*R + 0.534*G + 0.131*B;
			float newG = 0.349*R + 0.686*G + 0.168*B;
			float newR = 0.393*R + 0.769*G + 0.189*B;
			if (newB<0)newB = 0;
			if (newB>255)newB = 255;
			if (newG<0)newG = 0;
			if (newG>255)newG = 255;
			if (newR<0)newR = 0;
			if (newR>255)newR = 255;
			P1[3 * x] = (uchar)newB;
			P1[3 * x + 1] = (uchar)newG;
			P1[3 * x + 2] = (uchar)newR;
		}

	}
	imshow("怀旧色", img);
	waitKey();
	imwrite("D:/怀旧色.jpg", img);
}

//-----开始------
void COpenCVLearningDlg::OnBnClickedStartButton()
{
	Nostalgic();
}

怀旧结果：

2.2，连环画代码：

//连环画
void ComicStrip()
{
	Mat src = imread("D:\\test\\66.jpg");
	int width = src.cols;
	int heigh = src.rows;
	RNG rng;
	Mat img(src.size(), CV_8UC3);
	for (int y = 0; y<heigh; y++)
	{
		uchar* P0 = src.ptr<uchar>(y);
		uchar* P1 = img.ptr<uchar>(y);
		for (int x = 0; x<width; x++)
		{
			float B = P0[3 * x];
			float G = P0[3 * x + 1];
			float R = P0[3 * x + 2];
			float newB = abs(B - G + B + R)*G / 256;
			float newG = abs(B - G + B + R)*R / 256;
			float newR = abs(G - B + G + R)*R / 256;
			if (newB<0)newB = 0;
			if (newB>255)newB = 255;
			if (newG<0)newG = 0;
			if (newG>255)newG = 255;
			if (newR<0)newR = 0;
			if (newR>255)newR = 255;
			P1[3 * x] = (uchar)newB;
			P1[3 * x + 1] = (uchar)newG;
			P1[3 * x + 2] = (uchar)newR;
		}

	}
	Mat gray;
	cvtColor(img, gray, CV_BGR2GRAY);
	normalize(gray, gray, 255, 0, CV_MINMAX);
	imshow("连环画", gray);
	waitKey();
	imwrite("D:/连环画.jpg", gray);
}

//-----开始------
void COpenCVLearningDlg::OnBnClickedStartButton()
{
	ComicStrip();
}

连环画结果：

2.3，熔铸&冰冻

//熔铸
void casting(const Mat& src)
{
	Mat img;
	src.copyTo(img);
	int width = src.cols;
	int heigh = src.rows;
	Mat dst(img.size(), CV_8UC3);
	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++)
		{
			float b0 = imgP[3 * x];
			float g0 = imgP[3 * x + 1];
			float r0 = imgP[3 * x + 2];

			float b = b0 * 255 / (g0 + r0 + 1);
			float g = g0 * 255 / (b0 + r0 + 1);
			float r = r0 * 255 / (g0 + b0 + 1);

			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("熔铸", dst);
	imwrite("D://熔铸.jpg", dst);

}

//冰冻
void freezing(const Mat& src)
{
	Mat img;
	src.copyTo(img);
	int width = src.cols;
	int heigh = src.rows;
	Mat dst(img.size(), CV_8UC3);
	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++)
		{
			float b0 = imgP[3 * x];
			float g0 = imgP[3 * x + 1];
			float r0 = imgP[3 * x + 2];

			float b = (b0 - g0 - r0) * 3 / 2;
			float g = (g0 - b0 - r0) * 3 / 2;
			float r = (r0 - g0 - b0) * 3 / 2;

			r = (r>255 ? 255 : (r<0 ? -r : r));
			g = (g>255 ? 255 : (g<0 ? -g : g));
			b = (b>255 ? 255 : (b<0 ? -b : b));
			// 			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;
		}
	}
	imwrite("D://冰冻.jpg", dst);
}

void Casting()
{
	Mat src = imread("D:\\test\\66.jpg");
	imshow("src", src);
	casting(src);
	freezing(src);

	waitKey();

}

//-----开始------
void COpenCVLearningDlg::OnBnClickedStartButton()
{
	Casting();
}

熔铸结果：

冰冻结果：

 

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原文地址：https://blog.csdn.net/sangni007/column/info/stylizefliter