在Ubuntu安装库

sudo apt-get install libopencv-dev

生成字符图片，可以通过PS生成，身为程序员，尝试通过python生成，更加灵活方便

from PIL import Image, ImageDraw, ImageFontdef create_text_image(text, font_path, font_size, image_size, output_path):# 创建一个白色背景的图像image = Image.new('RGB', image_size, 'white')draw = ImageDraw.Draw(image)# 加载自定义字体font = ImageFont.truetype(font_path, font_size)# 使用 ImageDraw 的 textsize 方法获取文本尺寸text_width, text_height = draw.textsize(text, font=font)# 计算文本居中位置text_x = (image_size[0] - text_width) // 2text_y = (image_size[1] - text_height) // 2# 绘制黑色文字draw.text((text_x, text_y), text, font=font, fill='black')# 保存图像image.save(output_path)
# 示例用法
create_text_image("我钟意你", "STXINGKA.TTF", 200, (800, 200), "output.png")

最终的c++代码

#include <opencv2/opencv.hpp>
#include <iostream>using namespace cv;
using namespace std;int main(int argc, char** argv) {if (argc != 7) {cout << "Usage: " << argv[0] << " <source_image_path> <watermark_image_path> <output_image_path> <watermark_scale> <watermark_spacing> <scale_factor>" << endl;return 1;}// 加载原始图片和水印图片Mat src = imread(argv[1], IMREAD_COLOR);Mat watermark = imread(argv[2], IMREAD_COLOR);if (src.empty() || watermark.empty()) {cerr << "Error loading images." << endl;return 1;}float watermarkScale = stof(argv[4]);int watermarkSpacing = stoi(argv[5]);float scaleFactor = stof(argv[6]);// 放大原始图片Mat scaledSrc;resize(src, scaledSrc, Size(), scaleFactor, scaleFactor, INTER_LANCZOS4);// 缩放水印图片Mat scaledWatermark;resize(watermark, scaledWatermark, Size(), watermarkScale, watermarkScale, INTER_LINEAR);// 重复放置水印for (int y = 0; y < scaledSrc.rows; y += scaledWatermark.rows + watermarkSpacing) {for (int x = 0; x < scaledSrc.cols; x += scaledWatermark.cols + watermarkSpacing) {for (int wy = 0; wy < scaledWatermark.rows && (y + wy) < scaledSrc.rows; ++wy) {for (int wx = 0; wx < scaledWatermark.cols && (x + wx) < scaledSrc.cols; ++wx) {Vec3b& srcPixel = scaledSrc.at<Vec3b>(y + wy, x + wx);Vec3b& watermarkPixel = scaledWatermark.at<Vec3b>(wy, wx);// 混合水印和原始图片for (int c = 0; c < scaledSrc.channels(); ++c) {srcPixel[c] = saturate_cast<unsigned char>((1.0 - 0.1) * srcPixel[c] + 0.1 * watermarkPixel[c]);  // 10%透明度的水印}}}}}// 保存输出图像if (!imwrite(argv[3], scaledSrc)) {cerr << "Failed to save the output image." << endl;return 1;}cout << "Watermark added successfully with scale " << watermarkScale << " and spacing " << watermarkSpacing << " on an enlarged image." << endl;return 0;
}

./main test.jpg test_img.png out.png 1 1000 20

CC = g++
# CFLAGS = -Wall -gall: mainmain: main.cppg++ -o main main.cpp -I/usr/include/opencv4 -L/usr/lib/x86_64-linux-gnu -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_imgcodecsclean:rm -f main