前言：

開發環境：win10 Visual Studio 2017

開發語言：C++

編譯器：Debug X64

Opencv版本：4.1.1

代碼實現：

#include <iostream> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp>using namespace cv; using namespace std;bool MultiChannelBlending();int main() {system("color 0F");if (MultiChannelBlending()){cout << endl << "OK! Please start your performance ! ";}while (1){if (waitKey(100) == 27)break;} }bool MultiChannelBlending() {Mat Background, Bull, Rocket, Celts, Toronto, NewYork, Pelicans;Mat BlueChannelsBackground, BlueChannelsBull, BlueChannelsSpur;Mat GreenChannelsBackground, GreenChannelsCelts, GreenChannelsToronto;Mat RedChannelsBackground,RedChannelsNewYork, RedChannelsPelicans;vector<Mat>ChannelsBackground, ChannelsBull, ChannelsSpur, ChannelsCelts, ChannelsToronto, ChannelsNewYork, ChannelsPelicans;//【1】讀入圖片Background = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\背景.png");Bull = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\bull.png");Rocket = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\火箭.png");Celts = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\凱爾特人.png");Toronto = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\猛龍.png");NewYork = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\NewYork.png");Pelicans = imread("D:\\vs2017_Project\\5th-Separate_and_combine_channels\\鵜鶘.png");//【2】把一個3通道圖像轉換成3個單通道圖像split(Background, ChannelsBackground);//分離色彩通道split(Bull, ChannelsBull);//分離色彩通道split(Rocket, ChannelsSpur);//分離色彩通道split(Celts, ChannelsCelts);//分離色彩通道split(Toronto, ChannelsToronto);//分離色彩通道split(NewYork, ChannelsNewYork);//分離色彩通道split(Pelicans, ChannelsPelicans);//分離色彩通道//【3】將原圖的某通道引用返回給imageBlueChannel，注意是引用，相當于兩者等價，修改其中一個另一個跟著變// 【3-1】藍色通道BlueChannelsBackground = ChannelsBackground.at(0);BlueChannelsBull = ChannelsBull.at(2);BlueChannelsSpur = ChannelsSpur.at(0);// 【3-2】綠色通道GreenChannelsBackground = ChannelsBackground.at(1);GreenChannelsCelts = ChannelsCelts.at(1);GreenChannelsToronto = ChannelsToronto.at(1);// 【3-3】紅色通道RedChannelsBackground = ChannelsBackground.at(2);RedChannelsNewYork = ChannelsNewYork.at(2);RedChannelsPelicans = ChannelsPelicans.at(2);//【4】將原圖的某通道的某坐標處下的一塊區域和logo圖進行加權操作，將得到的混合結果存到對應背景圖的通道中// 【4-1】藍色通道addWeighted(BlueChannelsBackground(Rect(0, 220, Bull.cols, Bull.rows)), 1.0, BlueChannelsBull, 0.5, 0,BlueChannelsBackground(Rect(0, 220, Bull.cols, Bull.rows)));addWeighted(BlueChannelsBackground(Rect(0, 0, Rocket.cols, Rocket.rows)), 1.0, BlueChannelsSpur, 0.5, 0,BlueChannelsBackground(Rect(0, 0, Rocket.cols, Rocket.rows)));// 【4-2】綠色通道addWeighted(GreenChannelsBackground(Rect(220, 0, Celts.cols, Celts.rows)), 1.0,GreenChannelsCelts, 0.5, 0, GreenChannelsBackground(Rect(220, 0, Celts.cols, Celts.rows)));addWeighted(GreenChannelsBackground(Rect(220, 220, Toronto.cols, Toronto.rows)), 1.0,GreenChannelsToronto, 0.5, 0, GreenChannelsBackground(Rect(220, 220, Toronto.cols, Toronto.rows)));// 【4-3】紅色通道addWeighted(RedChannelsBackground(Rect(440, 0, NewYork.cols, NewYork.rows)), 1.0, RedChannelsNewYork, 0.5, 0, RedChannelsBackground(Rect(440, 0, NewYork.cols, NewYork.rows)));addWeighted(RedChannelsBackground(Rect(440, 220, Pelicans.cols, Pelicans.rows)), 1.0, RedChannelsPelicans, 0.5, 0, RedChannelsBackground(Rect(440, 220, Pelicans.cols, Pelicans.rows)));//【5】將三個單通道重新合并成一個三通道merge(ChannelsBackground, Background); // 注意，這里是將三個合并后的單通道再次合并為一個三通道，只需要一步操作！//【6】顯示效果圖imshow("NBA", Background);return true; }

結果：

參考資料：

https://blog.csdn.net/poem_qianmo/article/details/21176257

https://blog.csdn.net/gdfsg/article/details/50927257

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