OpenCV:找到二进制Mat图像的所有非零坐标 [英] OpenCV: Find all non-zero coordinates of a binary Mat image
问题描述
我试图找到二进制图像的非零(x,y)坐标。
我发现几个对函数 countNonZero()
的引用,它只计算非零坐标和 findNonZero()
我不确定如何访问或使用,因为它似乎已完全从文档中删除。
这是最接近的参考我发现,但仍然没有帮助。 编辑: 这里是如何 方法1: 方法2: I'm atttempting to find the non-zero (x,y) coordinates of a binary image. I've found a few references to the function This is the closest reference I found, but still not helpful at all. I would appreciate any specific help. Edit:
- To specify, this is using C++ Here is an explanation for how Method 1: Method 2:
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- 要指定,这是使用C ++ findNonZero()
保存非零元素的说明。以下代码可用于访问二进制图片的非零坐标。方法1在OpenCV中使用 findNonZero()
,方法2检查每个像素以找到非零值。
#include< iostream>
#include< opencv2 / core / core.hpp>
#include< opencv2 / highgui / highgui.hpp>
using namespace std;
using namespace cv;
int main(int argc,char ** argv){
Mat img = imread(binary image);
Mat非零坐标;
findNonZero(img,nonZeroCoordinates);
for(int i = 0; i
}
return 0;
}
$ b
#include< iostream>
#include< opencv2 / core / core.hpp>
#include< opencv2 / imgproc / imgproc.hpp>
#include< Opencv2 / highgui / highgui.hpp>
using namespace std;
using namespace cv;
int main(int argc,char ** argv){
Mat img = imread(binary image);
for(int i = 0; i for(int j = 0; j if(img。 at< uchar>(j,i)== 255){
cout< i<< ,< j<< endl; //你的操作
}
}
}
return 0;
}
countNonZero()
which only counts the non-zero coordinates and findNonZero()
which I'm unsure how to access or use since it seems to have been removed from the documentation completely.findNonZero()
saves non-zero elements. The following codes should be useful to access non-zero coordinates of your binary image. Method 1 used findNonZero()
in OpenCV, and Method 2 checked every pixels to find the non-zero ones.#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace std;
using namespace cv;
int main(int argc, char** argv) {
Mat img = imread("binary image");
Mat nonZeroCoordinates;
findNonZero(img, nonZeroCoordinates);
for (int i = 0; i < nonZeroCoordinates.total(); i++ ) {
cout << "Zero#" << i << ": " << nonZeroCoordinates.at<Point>(i).x << ", " << nonZeroCoordinates.at<Point>(i).y << endl;
}
return 0;
}
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace std;
using namespace cv;
int main(int argc, char** argv) {
Mat img = imread("binary image");
for (int i = 0; i < img.cols; i++ ) {
for (int j = 0; j < img.rows; j++) {
if (img.at<uchar>(j, i) == 255) {
cout << i << ", " << j << endl; // Do your operations
}
}
}
return 0;
}