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JPEG Image Orientation and Exif
2019年7月31日 23:19
The other day I came across a strange bug during work. My colleagues gave me some photographs taken with a smartphone. On their machines (Windows 7), all the photos were shown correctly in landscape mode. However, when I checked those photos, I found that some of those photos were shown in portrait mode (rotated 90 or 270 degrees) or upside-down (rotated 180 degrees).
I was curious what happened and learned about Exif and all its related stuff.