=> Android: rotate images by EXIF orientation, e.g. => iOS: rotate images by device orientation and assume that all iPhones have EXIF=1 in portrait mode, so there is hopefully no EXIF orientation to be applied Implementation Idea to show image and camera preview correctly on both iOS and Android: => EXIF information for Android are reported correctly => EXIF information for iOS are always the same => Camera Preview Widget needs rotation on both iOS & Android If some of your images are stored on disk as x,y and some are y,x, youre. And, in fact, is one of the most common bugs encountered in computer vision projects. This is an easy thing to mess up (especially when programming our own image pipelines). I did a more detailed study of EXIF orientation using an Iphone 7 and Samsung GT-I9195 with the help of your Īndroid (tested using Samsung GT-I9195 back camera): Device OrientationĬorrection Image = The number of degrees by which to rotate the picture taken by camera such that it is displayed correctlyĬorrection Camera Preview = The number of degrees by which to rotate the camera preview widget such that it is displayed correctly iOS (iPhone 7 back camera): Device Orientation Left: EXIF Orientation mismatch between annotation and image, Right: Correct Exif Orientation. If I analyze the image with imagemagick, it reports orientation=1 which is correct for the iPhone 7: However, for both phones the library reports orientation=6 which is wrong for the iPhone. Tested with Iphone 7 (should have orientation=1) and Samsung Galaxy S3 mini (should have orientation=6). Future getEXIFOrientationCorrection( List image) async ")
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