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Foto: Hanstheo Maria Nümm - Fotofreunde Much

A photo can be saved in different file formats for different purposes. In addition to the actual photo, metadata is also stored in these image files.

The most common questions about a photo are

  • When was the photo taken?
  • Where was that?
  • Who is the photo by?

Metadata are, for example, camera model, focal length, exposure time, aperture, and GPS data. Your camera saves this data according to the EXIF ​​standard. The IPTC standard allows other important information to be kept from the perspective of journalism. This includes, for example, the name of the photographer. This data is entered after the recording with the appropriate software. Data in XMP format is also possible.
Further metadata are possible in the file header according to the standards of the operating system manufacturers. These are, for example, markings (keywords, tags, keywords), title, ratings, comments, and subject.

It makes sense to record the metadata that we know about in our image files. If you change the photo software, this data is then also available for the new software. Our photo management software can automatically process the images according to the date they were taken, geographical aspects or other criteria. If some information is not passed on, it must be explicitly deleted before the photo is passed on.

Anyway, the JPG standard has held its own as of today (April 2023). 16:9 has established itself as the picture format, and our current TV sets present pictures with at least 1920 by 1080 pixels.

If you want to edit your photos professionally, you can edit them in the RAW format of your camera. For a presentation, a conversion into the JPG format takes place. The photo is then transferred to the areas of the photo collections. The RAW format, intermediate stages of photo editing and less good photos may remain in separate personal work areas of the individual user.

Since we don't know in which surroundings our photo objects will be added to the photo collection, we should make sure that the name is as unique as possible. The standard date and time in the format YYYYMMDD-SSMMSS has proven itself here. For example, a file named 20230401-210711.jpg will rarely find duplicate filenames. However, many old photos have other filename formats. Here it helps to make appropriate renaming with a tool.

That all sounds quite complex. But a lot of things work automatically. As a rule, we do not need to worry about all the details. The following links are therefore for information only. Further information on this can also be found in the <Rules> and <Tools> categories.

Hier Links zu Dateiformaten:
Was Sie über Bildformate und Fotoformate wissen sollten
Bildformate im Vergleich
Die 15 besten Bilddateitypen (Pros gegen Cons + Use Cases für jedes Format)
9 Dateiformate für Bilder: Welche gibt es und wie nutzt du sie?
Was man über das JPEG-Format wissen muss
WebP: Das effiziente Format für Bilder im Web
WebP oder JPEG: Ist das Google Bildformat wirklich besser?

Hier Links zu Metadaten-Formaten:
Was sind Metadaten? Und was man über Exif und IPTC wissen muss
Extensible Metadata Platform – Wikipedia (de)
Extensible Metadata Platform - Wikipedia (en)
Exif : Exchangeable Image File Format
Exif (en)
IPTC : IPTC-IIM-Standard (de)
IPTC Information Interchange Model (en)
Metadaten in Bilddatenbanken: IPTC und XMP
JSON gegenüber XML

Tools zur Bildbearbeitung:
Metadaten- GPS einstellen oder ändern
Flexible Renamer