看此篇前请先阅读https://blog.csdn.net/qq_20330595/article/details/144134160?spm=1001.2014.3001.5502

stb_image库配置

https://github.com/nothings/stb

代码

#define STB_IMAGE_IMPLEMENTATION  
#include "stb_image.h"  
#define STB_IMAGE_WRITE_IMPLEMENTATION  
#include "stb_image_write.h"  
#include <iostream>  

void invertColors(unsigned char* img_data, int width, int height, int channels) {  
    for (int i = 0; i < width * height * channels; i++) {  
        img_data[i] = 255 - img_data[i]; // 反转颜色  
    }  
}  

int main() {  
    const char* filepath = "IRI_20220322_145855.jpg"; // 图像路径  
    int width, height, channels;  

    // 加载图像  
    unsigned char* img_data = stbi_load(filepath, &width, &height, &channels, 0);  
    if (img_data == nullptr) {  
        std::cerr << "Error loading image: " << stbi_failure_reason() << std::endl;  
        return -1;  
    }  

    // 打印基本信息  
    std::cout << "Image loaded successfully!" << std::endl;  
    std::cout << "Width: " << width << ", Height: " << height << ", Channels: " << channels << std::endl;  

    // 反转图像颜色  
    invertColors(img_data, width, height, channels);  
    std::cout << "Colors inverted!" << std::endl;  

    // 保存新的图像  
    const char* outputFilepath = "output_image.png"; // 输出文件  
    if (stbi_write_png(outputFilepath, width, height, channels, img_data, width * channels)) { 
        std::cout << "Image saved successfully as " << outputFilepath << std::endl;  
    } else {  
        std::cerr << "Error saving image!" << std::endl;  
    }  

    // 释放图像数据  
    stbi_image_free(img_data);  
    return 0;  
}

运行结果