构建代码时，运行没有问题，但是我调试了代码，这生成了一条消息：函数使用栈的'1600000620'字节：超出/分析：stacksize 16384'。

我将声明：int array [2000] [2000]放入int main {}中，因为当int array [2000] [2000]不在int main {}中时，它会产生错误：array不明确。>

#include <iostream> 
#include <fstream> 
#include <sstream> 
using namespace std;

/* Function to sort an array using insertion sort*/
void insertionSort(int arr[],int n)
{
    int i,key,j;
    for (i = 1; i < n; i++){
        key = arr[i];
        j = i - 1;
        /* Move elements of arr[0..i-1],that aregreater than key,to one 
position aheadof their current position */
        while (j >= 0 && arr[j] > key){
            arr[j + 1] = arr[j];
            j = j - 1;
        }
        arr[j + 1] = key;
    }
}

int arr[2000][2000];
int main()
{
    int array[2000][2000];
    int window[9],row = 0,col = 0,numrows = 0,numcols = 0,MAX = 0;
    ifstream infile("phone.jpg");
    stringstream ss;
    string inputLine = "";

    // First line : version
    getline(infile,inputLine);
    if (inputLine.compare("P2") != 0) cerr << "Version error" << endl;
    else cout << "Version : " << inputLine << endl;

    // Continue with a stringstream
    ss << infile.rdbuf();

    // Secondline : size of image
    ss >> numcols >> numrows >> MAX;

    //print total number of rows,columns and maximum intensity of image
    cout << numcols << " columns and " << numrows << " rows" << endl<< 
    "Maximium Intesity "<< MAX <<endl; 

    //Initialize a new array of same size of image with 0
    for (row = 0; row <= numrows; ++row)
    {
        array[row][0] = 0;
    }
    for (col = 0; col <= numcols; ++col) {
        array[0][col] = 0;
    }

    // Following lines : data
    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //original data store in new array
            ss >> array[row][col];
        }
    }

    // Now print the array to see the result
    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
        //neighbor pixel values are stored in window including this pixel
            window[0] = array[row - 1][col - 1];
            window[1] = array[row - 1][col];
            window[2] = array[row - 1][col + 1];
            window[3] = array[row][col - 1];
            window[4] = array[row][col];
            window[5] = array[row][col + 1];
            window[6] = array[row + 1][col - 1];
            window[7] = array[row + 1][col];
            window[8] = array[row + 1][col + 1];

            //sort window array
            insertionSort(window,9);

            //put the median to the new array 
            arr[row][col] = window[4];
        }
    }

    ofstream outfile;

    //new file open to stroe the output image 
    outfile.open("Medianfilter.pnm");
    outfile << "P2" << endl;
    outfile << numcols << " " << numrows << endl;
    outfile << "255" << endl;

    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //store resultant pixel values to the output file
            outfile << arr[row][col] << " ";
        }
    }

    outfile.close();
    infile.close();
    return 0;
}

我希望该程序可以清除图像，消除图像中的噪点。