Shulou(Shulou.com)05/31 Report--

这篇文章主要介绍了opencv3/C++图像像素操作的方法的相关知识，内容详细易懂，操作简单快捷，具有一定借鉴价值，相信大家阅读完这篇opencv3/C++图像像素操作的方法文章都会有所收获，下面我们一起来看看吧。

RGB图像转灰度图

RGB图像转换为灰度图时通常使用：

进行转换，以下尝试通过其他对图像像素操作的方式将RGB图像转换为灰度图像。

#include#includeusing namespace cv;int main(){ //像素操作 Mat src,dst; src = imread("E:/image/image/daibola.jpg"); if(src.empty()) { printf("can not load image \n"); return -1; } namedWindow("input"); imshow("input",src); dst.create(src.size(), src.type()); for(int row = 0; row < src.rows; row++) { for(int col = 0; col < src.cols; col++) { int b = src.at(row, col)[0]; int g = src.at(row, col)[1]; int r = src.at(row, col)[2]; dst.at(row, col)[0] = max(r,max(g,b)); dst.at(row, col)[1] = max(r,max(g,b)); dst.at(row, col)[2] = max(r,max(g,b)); } } namedWindow("output"); imshow("output",dst); waitKey();}

同理使用min(r,min(g,b))可以看到由于选择了较小的灰度值图像会明显变暗：

图像线性增强

通过对图像像素操作（线性变换），实现图像的线性增强。

#include#includeusing namespace cv;int main(){ Mat src1, dst; src1 = imread("E:/image/image/im1.jpg"); if(src1.empty()) { printf("can not load im1 \n"); return -1; } double alpha = 1.2, beta = 50; dst = Mat::zeros(src1.size(), src1.type()); for(int row = 0; row < src1.rows; row++) { for(int col = 0; col < src1.cols; col++) { if(src1.channels() == 3) { int b = src1.at(row, col)[0]; int g = src1.at(row, col)[1]; int r = src1.at(row, col)[2]; dst.at(row, col)[0] = saturate_cast(b*alpha + beta); dst.at(row, col)[1] = saturate_cast(g*alpha + beta); dst.at(row, col)[2] = saturate_cast(r*alpha + beta); } else if (src1.channels() == 1) { float v = src1.at(row, col); dst.at(row, col) = saturate_cast(v*alpha + beta); } } } namedWindow("output",CV_WINDOW_AUTOSIZE); imshow("output", dst); waitKey(); return 0;}

掩膜操作调整图像对比度

使用一个3×3掩模增强图像对比度：

#include#includeusing namespace cv;int main(){ Mat src, dst; src = imread("E:/image/image/daibola.jpg"); CV_Assert(src.depth() == CV_8U); if(!src.data) { printf("can not load image \n"); return -1; } src.copyTo(dst); for(int row = 1; row

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.