Having all of this info captured by the camera means you can focus on taking more pictures instead of taking notes to reference later.Įxif Data displayed in Windows 10 File Explorer This can be useful when determining when or where the photo was taken, and also what settings were used. The photographer can also access EXIF data. This data is stored by the camera within the photo file and can be accessed and used by software to locate sort, and process photos. The word “EXIF” comes from the Exchangeable Image File Format standard. Some of the most common data are things such as date, time, GPS location, camera model, lens type, ISO, focal length, shutter speed, etc. This information includes many settings and other technical aspects that can be very useful.
Articles Related to “What is EXIF Data? When to Keep it and When to Remove it“ĮXIF data, sometimes called metadata, is a collection of information that is stored by the camera at the moment you take a photo. How to remove EXIF Data from our Photos. Should we keep it or remove EXIF Data from our Photos?. To read the XMP tags ofĮmbedded objects, use exiftool -extractEmbedded -all:all $FILE. Embedded objects.Īfter running qpdf, there may be new XMP metadata, as it extracts metadata from any embedded objects. Qpdf can be used to linearize PDF files ( qpdf -linearize $FILE), which optimises them for fast web loading and removes any orphan data. exiftool -all:all=> remove all the tags.Įxiftool -all:all also removes the pointer to the Info Dictionary, but does not completely remove it. exiftool -all:all => read all the tags. exiftoolĮxiftool can be used to read/write XMP metadata from/to PDF files. As noted in the pdftk documentation, though, pdftk does not alter XMP metadata. See pdftk-unset-info-dictionary-values.php below for an example. 
Pdftk can be used to update the Info Dictionary of a PDF file. To remove previously-deleted data, the PDF file must be rebuilt. When information is removed from a PDF file, the pointer is removed, but the actual data may not be removed. When information is added to a PDF file, it is appended to the end of the file and a pointer is added.
XMP packets, which contain RDF statements expressed as XMLĪ PDF file contains a) objects and b) pointers to those objects. the Info Dictionary, a limited set of key/value pairs. Metadata in PDF files can be stored in at least two places:
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