cocos2d-x利用CCClippingNode实现滚动字幕

这周单位要做一个人脸美化的项目，查资料遇到这位大牛的博客，地址如下：点击打开链接

我的代码也是在他的基础上进行修改的，但是他对图像的RGB三个通道平等调节，为了适应我的需求，我改成了针对三个通道分别调节。废话不多说，开始上源码

void ImageAdjust(Mat& src, Mat& dst,
				 vector<double> low_in,
				 vector<double> high_in,
				 vector<double> low_out,
				 vector<double> high_out,
				 vector<double> gamma)
{
	vector<double> low;
	vector<double> high;
	vector<double> bottom;
	vector<double> top;
	vector<double> err_in;
	vector<double> err_out;
	int N = low_in.size();

	for (int i=0; i<N; i++)
	{
		low.push_back(low_in[i]*255);
		high.push_back(high_in[i]*255);
		bottom.push_back(low_out[i]*255);
		top.push_back(high_out[i]*255);
		err_in.push_back(high[i] - low[i]);
		err_out.push_back(top[i] - bottom[i]);
	}

    int x,y;
	vector<double> val;

    // intensity transform
    for( y = 0; y < src.rows; y++)
    {
        for (x = 0; x < src.cols; x++)
        {
            for (int i=0; i<N; i++)
            {
				double val = (src.at<Vec3b>(y, x)[i]);
				val = pow((val-low[i])/err_in[i], gamma[i])*err_out[i]+bottom[i]; // ☆

				if(val > 255) 
					val = 255;
				if(val < 0) 
					val = 0;
				dst.at<Vec3b>(y, x)[i] = val;
            }
        }
    }

}

测试主函数：

int _tmain(int argc, _TCHAR* argv[])
{
	Mat src = imread("test.png",1);
	Mat dst = Mat(src.size(), src.type());

	if (!src.empty())
	{
		double a[] = {0.0, 0.0, 0.0};
		double b[] = {1.0, 1.0, 1.0};
		double c[] = {0.0, 0.0, 0.0};
		double d[] = {1.0, 1.0, 1.0};
		double e[] = {1.0, 1.0, 1.0};

		vector<double> low_in(a, a+3);
		vector<double> high_in(b, b+3);
		vector<double> low_out(c, c+3);
		vector<double> high_out(d, d+3);
		vector<double> gamma(e, e+3);

		ImageAdjust(src, dst, 
			low_in, 
			high_in, 
			low_out, 
			high_out, 
			gamma
			);

		imshow("src", src);
		imshow("dst", dst);
		waitKey(0);
	}


    return 0;
}

cocos2d-x利用CCClippingNode实现滚动字幕,布布扣,bubuko.com

cocos2d-x利用CCClippingNode实现滚动字幕

原文：http://blog.csdn.net/u010229677/article/details/26728103