I want to change the EXIF orientation tag in my JPEG images but without actual rotating of them. I want to do this to use them as a test case for an application I made.
How I can do that in Linux? Can I do it with exiftool? And if so, how?
You can retrieve the existing orientation information via exiftool as follows:
exiftool -Orientation -n image.jpg
This will display the internal value of the orientation information held in the MIE tags. You can return the value as an English string by omitting the -n flag. You can find additional information here regarding particular rotation/orientation values.
Changing the orientation data with exiftool can be done as follows:
exiftool -Orientation=1 -n image.jpg
Here, the orientation is set to 1, indicating no rotation. These numbers are defined as per the EXIF specification; you can see what effect different rotation values have in the link above.
(note: you must use the -n argument when setting orientation to indicate that the value is numeric. If you forget, exiftool will interpret the orientation=x number as a string and set the wrong rotation ie. exiftool -orientation=1 image.jpg will actually set the orientation to 3 which is 'Rotate 180')
answered May 10 '13 at 19:15
My solution was the same as @Breakthrough, but I had to put the -n before -Orientation, such as
exiftool -n -Orientation=1 image.jpg
below command can be used to change orientation e.g exiftool -orientation="Horizontal (normal)" filename.tiff
