opencv+對圖片實現聚光燈效果
阿新 • • 發佈:2018-11-27
dota2玩過藍貓的同學肯定很熟悉這個中年大叔騷騷的臺詞“聚光燈呢?朝這打”,最近玩遊戲的時候突然想到,如果在選人介面加入一個聚光燈效果對遊戲體驗是不是會有較好的加強,於是我嘗試做了下!先上乾貨
#include <opencv2/opencv.hpp> #include <iostream> using namespace std; using namespace cv; Mat original; void on_mouse(int event, int x, int y, int flags, void *ustc) { Mat srcImg, resImg, roi; srcImg = original.clone(); resImg = Mat::zeros(srcImg.size(), srcImg.type()); roi = Mat::zeros(srcImg.size(), CV_8UC1); circle(roi, Point(x, y), 60, CV_RGB(255, 255, 255), -1); srcImg.copyTo(resImg, roi); if (event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON)) { imshow("screen", resImg); } else if (event == CV_EVENT_LBUTTONDOWN) { imshow("screen", original); } } int main(int argc, char** argv[]) { original = imread("hero.jpg"); resize(original, original, Size(800, 600)); namedWindow("screen", WINDOW_AUTOSIZE); imshow("screen", original); setMouseCallback("screen", on_mouse, 0); waitKey(0); return 0; }
這是原圖
然後當我們滑鼠移動的時候就會出現聚光燈效果,如圖
๑乛◡乛๑,是不是滿滿的科技感