Program Support
Exif data are embedded within the image file itself. While many recent image manipulation programs recognize and preserve Exif data when writing to a modified image, this is not the case for most older programs. Many image gallery programs also recognise Exif data and optionally display it alongside the images.
Software libraries, such as libexif for C and Adobe XMP Toolkit or Exiv2 for C++, Metadata Extractor for Java, or Image::ExifTool for Perl, parse Exif data from files and read/write Exif tag values.
Read more about this topic: Exchangeable Image File Format
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