如何在opencv中将源代码从matlab转换为C ++

问题描述

我正在尝试将MatLab中的代码转换为OpenCV，但我对以下几行感到困惑，因为我不太了解编程，有人可以帮助我吗？

I am trying to convert a code in MatLab to OpenCV but I am stuck about the following lines as I don't know much programming, can someone here help me?

[n,m]=size(citra);
for x=1:n
    k=m;
    for y=1:m
        citra_baru(k,x)=citra(x,y);
        k=k-1;
    end;
end;

，完整代码为：

and the full code is:

clc;
clear;
disp('Rotate Operation');
disp('--------------------');
disp('input file name with the extension');
image= input('input image file = ');
citra=imread(image);
[n,m]=size(citra);
for x=1:n
    k=m;
    for y=1:m
        new_citra(k,x)=citra(x,y);
        k=k-1;
    end;
end;
subplot(1,2,1),imshow(citra),title('Citra Gray');
subplot(1,2,2),imshow(new_citra),title('Citra Rotate 90');

我尝试了什么：



我试图像这样转换，但仍然是错误



#include< opencv\cv.h>

#include< opencv \highgui.h>

#include< iostream> ;



使用命名空间cv;

使用命名空间std;



int main（）

{

Mat img = imread（D：\\Kuliah \\ Pengolahan Citra Digital \\PCD \\ images \\图3.35（a）.jpg，CV_LOAD_IMAGE_UNCHANGED）;

Mat img1（img.size（），img.type（））;

int n = img.size（）。width;

int m = img.size（）。height;

cout<< n<< << m;

for（int x = 1; x< = n; x ++）{

int k = m;

for（int y = 1; y< = m; y ++）{

img1.at< uchar>（n，m）= img.at< uchar>（x，y）;

（k，x）=（x，y）;

}

k = k-1;

}

namedWindow（Original Image，CV_WINDOW_AUTOSIZE）;

imshow（Original Image，img）;

namedWindow（Cropped Image，CV_WINDOW_AUTOSIZE）;

imshow（裁剪图像，img1）;

waitKey（0）;

返回0;

}

What I have tried:

i've tried to convert like this, but still error

#include <opencv\cv.h>
#include <opencv\highgui.h>
#include <iostream>

using namespace cv;
using namespace std;

int main()
{
Mat img = imread("D:\\Kuliah\\Pengolahan Citra Digital\\PCD\\images\\Fig3.35(a).jpg", CV_LOAD_IMAGE_UNCHANGED);
Mat img1(img.size(), img.type());
int n = img.size().width;
int m = img.size().height;
cout << n << " " << m;
for (int x = 1; x <= n; x++){
int k = m;
for (int y =1; y <= m; y++){
img1.at<uchar>(n, m) = img.at<uchar>(x, y);
(k,x) = (x,y);
}
k=k-1;
}
namedWindow("Original Image", CV_WINDOW_AUTOSIZE);
imshow("Original Image", img);
namedWindow("Cropped Image", CV_WINDOW_AUTOSIZE);
imshow("Cropped Image", img1);
waitKey(0);
return 0;
}

推荐答案

// See below
//Mat img1(img.size(), img.type());
int n = img.size().width;
int m = img.size().height;
cout << n << " " << m;
// Use swapped dimensions here.
// EDIT: Don't know if this works.
//  The uncommented line should according to the documentation.
//Mat img1(m, n, img.type());
Mat img1(Size(m, n), img.type());
for (int x = 0; x < n; x++){
    // EDIT: Was k = m; fixed
    int k = m - 1;
    for (int y = 0; y < m; y++){
//      This should be (k,x) = (x,y)
//      img1.at(n, m) = img.at(x, y);
        img1.at(k, x) = img.at(x, y);
    }
    k--;
}

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