将灰度转换为ascii并将其写入.txt文件

#include <iostream>
#include <fstream>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

string grayscaleToASCII(Mat& image) {
    string asciiImage = "";
    string asciiChars = "#$@%";

    for (int i = 0; i < image.rows; i++) {
        for (int j = 0; j < image.cols; j++) {
            int grayscaleValue = image.at<uchar>(i, j);
            int charIndex = grayscaleValue / 32; // 根据灰度值计算字符索引
            asciiImage += asciiChars[charIndex];
        }
        asciiImage += "\n"; // 换行
    }

    return asciiImage;
}

int main() {
    Mat image = imread("input.jpg", IMREAD_GRAYSCALE); // 加载灰度图像
    string asciiImage = grayscaleToASCII(image); // 转换为ASCII

    ofstream outputFile("output.txt"); // 创建输出文件
    if (outputFile.is_open()) {
        outputFile << asciiImage; // 写入ASCII字符串
        outputFile.close();
        cout << "转换完成并写入output.txt文件" << endl;
    }
    else {
        cout << "无法打开输出文件" << endl;
    }

    return 0;
}