Why do photographs when emailed from a iPhone to a computer come out sideways many times?

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Why do photographs when emailed from a iPhone to a computer come out sideways many times?

In: Technology
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The answer is metadata. As with all tech, companies doesnt agree on a single thing to store data. Sometimes the photos metadata arent compatible to software in a computer used to display it.

phones have a little thing inside that tells the phone if it’s upright, sideways, or upside down. when you take a picture with your phone, the information from that little thing gets written down inside the photo to tell other computers how to rotate the photo. sometimes, the other computers don’t read this little note and just show the photo however they want to.

When you rotate a photo on a smartphone, it doesn’t necessarily actually rotate the photo. It just adds a little bit of data to the file that says “when you show this photo, rotate it 90 degrees” for instance. However, not all programs understand this additional information, so they show the original unrotated photo.