EXIFTOOL ORIENTATION FLAG HOW TO
EXIFTOOL ORIENTATION FLAG FULL

The problem is that removing all the Exif data causes such an image to revert to its raw state as explained below. The setting 'Rotate 90 CW' causes it to be displayed after rotating 90° in the clockwise direction. The actual image in this case is rotated 90° anti-clockwise (the top of the image is to the left) and this needs to be reversed. You can find information about the Orientation tag on the ExifTool web site.

I later discovered that the orientation setting can be viewed with the exiftool command: $ exiftool -orientation testimage.jpg They had apparently been taken with one orientation but were being rotated for viewing.

The ProblemĪ show was sent in early March 2022 which had three images with orientation values in the Exif metadata.

EXIFTOOL ORIENTATION FLAG HOW TO

This short episode describes the journey I had learning about this issue and finding how to get round it. If this is just removed the image might be shown wrongly. Sometimes images are created with a particular orientation by the camera but are written with an Exif orientation setting that shows another orientation. Many people will be alert to this, but in case anything slips through it seems a courtesy to anonymise images sent to HPR.Īs I was implementing this I realised that one piece of Exif data: 'Orientation', can’t just be removed. That’s because this metadata may contain details that could identify the creator of the image - their camera, their location, and other things. One of the things the script does is to strip Exif metadata from such images. I’m writing a script to process image files sent in by HPR hosts with their shows. Tags: image,Exif,exiftool,GraphicsMagick,orientation. Hosted by Dave Morriss on is flagged as Explicit and is released under a CC-BY-SA license. Hpr3564 :: Removing EXIF data from an image An image might reveal data you want to keep private Then, even after caching the right size thumbnail, it repeatedly takes one second per image every time I return to the folder - provided the window is set to display details, including something like dimensions, or exif date taken.- skip to main content Hacker Public Radio Your ideas, projects, opinions - podcasted. This is probably irrelevant, but I just thought I'd add my observations.Įxplorer has a similar issue with taking about 1 second per image caching the original thumbnails.

The conversion itself is much faster, so it does not seem to be related to file i/o. This still happens even after the file detail has been cached. Task manager shows XnviewMP chewing up a single core, split about 50/50 between user space and kernel.

When I select a group of files for a batch conversion, and start the conversion, there is a length of time, greater than one second per image, before the conversion progress window pops up.

Each time after that then the information seems to be obtained from the image DB.

EXIFTOOL ORIENTATION FLAG FULL

the first time I visit a folder full of heic images in the XnviewMP browser it takes about one second per image to read the properties, and I presume, create the thumbnail.I suppose I could have reset the xnview options beforehand to not do the rotation, but I prefer my files to not require the orientation flag anyway. Note that copying the orientation flag would be a mistake, as xnviewmp rewrites portrait images in normal orientation. Code: Select all exiftool -overwrite_original -TagsFromFile file.heic -EXIF:all -EXIF:orientation=normal file.jpg

Exiftool orientation flag