Post-processing: Removing embedded thumbnail images
Check for embedded thumbnail images:
magick identify {filename}or
identify {filename}If a thumbnail is embedded, the output will list more than one ‘page’, one of them with a lower resolution. Double-check which of the images is the thumbnail (usually the second).
Remove thumbnail image:
exiftool -ifd1:all= -m {filename}This command will remove the second and all subsequent pages. The tool will create a backup of the original image.