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Automated Processing Tools for Better Digital Pictures

Nov 11, 2008, 23:34 (0 Talkback[s])
(Other stories by Ben Martin)

"exiftool gives you great flexibility in how you invoke it. Depending on which options you are using, exiftool either updates the supplied image files or works more as a filter: reading images from your nominated locations and writing them to standard output or a target directory. When exiftool is operating in filter mode, you supply the file or directory name you would like to use as the source as the final argument. You can also use a hyphen to have exiftool read its data from standard input. In filter mode the results are written to standard output, or you can use the -w option to write output images to files instead.

"A typical invocation of exiftool takes an input image, performs some metadata operations on it, and writes the output to standard output (filter mode) or back to the original file name, keeping a backup of the original content as file.jpg_original (update mode). If you have good backups and you are confident that exiftool works as expected, you can also update an image without creating backup files by using the -overwrite_original option."

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