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iPad pictures posting upside down
Posted: Mon Dec 30, 2019 8:49 am
by roymck
Have people saying that my pics come out upside down , they all seem the correct way up for me when I view them .
Posting this picture upside down , what way up is it to you ?
F339334C-5BBB-4743-88D7-681AA0C6E032.jpeg
Re: iPad pictures posting upside down
Posted: Mon Dec 30, 2019 9:13 am
by Lakeland997
Upside down - even though I'm in NZ at the moment
If you take images on an Apple device the 'wrong 'way up they post here like that. If you looked at the page on a PC they would appear upside down to you too. Your apple device compensates for that and shows you it the right way round. Any other Apple device shows them upside down (my MacBook for example).
Confused? You will be...
The solution is to always take images the 'other' way. On an iPhone that is with the volume buttons facing down (in Landscape mode).
(It's a pity as I liked to use the volume buttons to trigger the shutter rather than the on screen button.)
If you've already taken the images then you will need to run them through an image editor first to get rid of the Apple 'memory' embedded in the image.
Unless someone knows an easier solution...
Andy
Re: iPad pictures posting upside down
Posted: Thu Jan 02, 2020 9:06 am
by mk1
Upside down for me too.
Re: iPad pictures posting upside down
Posted: Thu Jan 02, 2020 11:54 am
by roymck
So are we saying if I turn the iPad upside down and take the photos it will come out right way up on here?
Re: iPad pictures posting upside down
Posted: Thu Jan 02, 2020 11:57 am
by iain1967s
Re: iPad pictures posting upside down
Posted: Thu Jan 02, 2020 12:50 pm
by roymck
mk1 wrote:Upside down for me too.
Even more confused as I posted that upside down and you see it upside down .
Post it right way up and some people see it upside down !
Re: iPad pictures posting upside down
Posted: Thu Jan 02, 2020 2:52 pm
by iain1967s
I think this is maybe to do with EXIF tags?
Apple iOS devices [and other phones/tablets] contain a rotation sensor. They encode the rotation angle as part of the meta-data attached to the image, but the image data is always written to the file according to the default orientation that the camera sensor is physically mounted into the device.
If the second device being used to display the image honors the EXIF rotation tag, the image will render in the intended orientation. If not, it will render in the native rotation of how the pixels were stored inside the file.
Let’s say your iPad has a native orientation of horizontal. If you take a photo while holding it vertically it will still read the camera sensor horizontally, but will add a 90 degree rotation flag to tell viewers that they should render it to show the image vertically.
If you then display that image in iPad photos it will look correct, as it honors the rotation tag.
If you display it in Windows photo viewer or paint, the rotation flag is ignored, so the image will be sideways.
Same thing if you hold the device “upside down” when you take the photo - the orientation tag will be set to 180 degrees. It’ll look ok on an apple or other device / browser that honors the tag, but be upside down on a device that ignores the EXIF.
By the way, EXIF meta-data can also include the GPS coordinates for where the photo was taken. Tools are available to strip the meta-data from the image, if it’s a concern.
Re: iPad pictures posting upside down
Posted: Thu Jan 02, 2020 8:13 pm
by Lakeland997
That’s what I was saying above only you’ve said it much better
