I've got a number of images (jpg) taken with a mobile phone camera.
When I look at the thumbnail picture (windows explorer) everything looks fine.
However when I open the picture in an image editor/viewer I find things like the image is rotated 90 or 180 degrees OR WORSE, the image is truncated. By that I mean one might have a strip of grey covering half the image.
How can I 'repair' the jpg so the picture displays correctly ?