linuxbyexample.org In today's screen cast I am going to show you how to read and write Exif tags to and from your digital photographs. Exif is an acronym for EXchangeable Image File format, which is a standard for including metadata in certain types of files, particularly JPEG image files produced by your digital camera. This metadata can contain a lot of information like the make of your camera, but it also includes details about each photograph, like the exposure, shutter speed and whether the flash fired or not. I have two specific examples I want to show you today. First, lets say you forgot to change your cameras internal date and time before you went on holiday, all the pictures would be taken with the wrong time stamp, so I am going to demonstrate how you can quickly modify the date and time across all your photographs by entering a timezone offset. In the second example I am going to show you how to add a copyright notice to all your photographs. We are going to use the Exif tool developed by Phil Harvey, which is a platform independent Perl library coupled with a command line utility, which will read and write Exif tags for JPEG images. There will be a link to this web site in the show notes. The web site contains simple instructions on how to install the software under Linux, and once installed you can start adding and modifying Exif tags to your image collection. Here I have some photographs I took on a recent trip to France, which I am going to use for this ...
Tags: linux, exif, exiftool, tutorial, technology, tips & tricks, linuxbyexample
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