This leaves the empty tag in the image file so it can be written to again if necessary. Exiftool provides the clearMetadataFromTag() method to clear tag values. This is slighlty different that stripping the tag entirely from the image. This is essentially the same as writing an empty string to the tag. Tags can be cleared of their metadata value. The simplest use of Exiftool looks like this: getMetadata ( '/path/to/a/different/image.jpg', 'ADifferentSavedShortcut', 'EXIF:LensInfo', 'EXIF:FocalLength', 'File:ImageWidth', 'File:ImageHeight' ) getMetadata ( '', '', 'EXIF:LensInfo', 'EXIF:FocalLength', 'File:ImageWidth', 'File:ImageHeight' ) // All three parameters can be used at once if desired.

For example, extracting LensInfo, // FocalLength, ImageWidth and ImageHeight values (if present). getMetadata ( '', 'ADifferentSavedShortcut', '' ) // Adding Tags to command to be extracted, in additon to those // specified in the shortcut. getMetadata ( '/path/to/a/different/image.jpg', '', '' ) // Using all the default options, but calling a different shortcut // previously saved to the nfig file. getMetadata ( ) // Changing the image path, if you want, for some reason.

Exiftool github