从左上角到右下角的像素积分图

 1 #include <opencv2/opencv.hpp>
 2 #include <iostream>
 3 
 4 using namespace cv;
 5 
 6 int main(int argc, char** argv) {
 7     Mat src = imread("L:/5.jpg", IMREAD_GRAYSCALE);
 8     if (src.empty()) {
 9         printf("could not load image...\n");
10         return -1;
11     }
12     namedWindow("input image", CV_WINDOW_AUTOSIZE);
13     imshow("input image", src);
14 
15     Mat sumii = Mat::zeros(src.rows + 1, src.cols + 1, CV_32FC1); //参数1.左上角像素和
16     Mat sqsumii = Mat::zeros(src.rows + 1, src.cols + 1, CV_64FC1);//参数2.左上角像素平方和
17     integral(src, sumii, sqsumii);  //积分算法API
18 
19     Mat iiResult;
20     normalize(sumii, iiResult, 0, 255, NORM_MINMAX, CV_8UC1, Mat());// 归一化
21     imshow("Integral Image", iiResult);
22 
23     waitKey(0);
24     return 0;
25 }