0. 前言
开发环境为Windows，使用vcpkg安装exiv2库。关于vcpkg的安装，请参考vcpkg官方文档。 如果使用其他环境，请自行通过搜索引擎查找相关资料。
1. 安装 exiv2
vcpkg install exiv2
2. CMmakeLists.txt 配置
include("C:\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake") # 此处修改为你的vcpkg安装路径
find_package(exiv2 CONFIG REQUIRED)
target_link_libraries(your_target PRIVATE Exiv2::exiv2lib) # 此处的your_target请修改为你的项目名称
3. 引入头文件
#include <exiv2/exiv2.hpp>
4. 读取图片元数据
static Exiv2::ExifData::const_iterator GetExifValue(Exiv2::ExifData& ed, const std::string& key) {
Exiv2::ExifKey tmp = Exiv2::ExifKey(key);
Exiv2::ExifData::iterator tag = ed.findKey(tmp);
return tag;
}
5. 修改图片元数据
static bool SetExifValue(Exiv2::ExifData& ed, const std::string& key, const std::string& value) {
Exiv2::ExifKey tmp = Exiv2::ExifKey(key);
Exiv2::ExifData::iterator tag = ed.findKey(tmp);
if (tag != ed.end()) {
return tag->setValue(value) == 0;
}
return false;
}
6. 完整代码
#include <exiv2/exiv2.hpp>
#include <iostream>
// 获取exif数据
static Exiv2::ExifData::const_iterator GetExifValue(Exiv2::ExifData& ed, const std::string& key) {
Exiv2::ExifKey tmp = Exiv2::ExifKey(key);
Exiv2::ExifData::iterator tag = ed.findKey(tmp);
return tag;
}
// 修改exif数据
static bool SetExifValue(Exiv2::ExifData& ed, const std::string& key, const std::string& value) {
Exiv2::ExifKey tmp = Exiv2::ExifKey(key);
Exiv2::ExifData::iterator tag = ed.findKey(tmp);
if (tag != ed.end()) {
return tag->setValue(value) == 0;
}
return false;
}
int main() {
try {
// 打开图片文件
std::string imagePath = "E:\\Projects\\Demo\\test.JPG"; // Replace with the actual image path
std::unique_ptr<Exiv2::Image> image = Exiv2::ImageFactory::open(imagePath);
if (image.get() == 0) {
std::cerr << "Failed to open the image" << std::endl;
return EXIT_FAILURE;
}
// 获取exif数据
image->readMetadata();
Exiv2::ExifData& exifData = image->exifData();
// 修改exif数据
bool result = SetExifValue(exifData, "Exif.Image.Make", "Demo");
if (result) {
// 保存修改
image->setExifData(exifData);
image->writeMetadata();
}
else {
std::cout << "Failed to modify Exif.Image.Make" << std::endl;
}
// 遍历exif数据，打印所有的key和value
for (Exiv2::ExifData::const_iterator it = exifData.begin(); it != exifData.end(); ++it) {
std::cout << it->key() << " : " << it->value() << std::endl;
}
}
catch (Exiv2::Error& ex) {
std::cerr << "Caught Exiv2 exception: " << ex << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
欢迎在评论区留下您的见解~