Introduction

ExifLibrary is a .NET library for extracting/editing metadata contained in JPEG/Exif files. ExifLibrary requires the .NET Framework 2.0.

Using the Library

To extract Exif metadata from a JPEG/Exif image, create an instance of the ImageFile class with the path to the image file. The ImageFile class reads the APP1 section, and extracts all Exif tags and also the embedded thumbnail (if any). For ease of use, the library converts Exif tags to either .NET native types or custom classes. Date fields are returned as DateTime structures, GPS coordinates are wrapped with custom !GPSLatitudeLongitude classes, etc.

``` // Extract exif metadata ImageFile file = ImageFile.FromFile("path_to_my_image");

// Read metadata foreach (ExifProperty item in file.Properties.Values) { // Do something with meta data }

// Get the thumbnail image Image thumb = file.ThumbnailImage; ```

You can modify the metadata and save your changes.

``` // Extract exif metadata ImageFile file = ImageFile.FromFile("path_to_my_image");

// Set the date time to now file.Properties.Set(ExifTag.DateTime, DateTime.Now); // Set GPS location to 22d 0m 0s file.Properties.Set(ExifTag.GPSLatitude, 22.0, 0.0, 0.0);

// Save exif metadata with the image file.Save("path_to_my_image"); ```

You can add new metadata.

``` // Extract exif metadata ImageFile file = ImageFile.FromFile("path_to_my_image");

// Add the Exif Artist tag file.Properties.Set(ExifTag.Artist, "Me");

// Save exif metadata with the image file.Save("path_to_my_image"); ```

You can also clear the metadata.

``` // Extract exif metadata ImageFile file = ImageFile.FromFile("path_to_my_image");

// Clear metadata file.Properties.Clear();

// Save exif metadata with the image file.Save("path_to_my_image"); ```

Known Issues

There is a known issue with JPEG images with embedded TIFF thumbnails. The current version of ExifLibrary does not read or write TIFF thumbnails.