I'm using UIImagePickerController to capture an image and then store it. However, when i try to rescale it, the orientation value i get out of this image is incorrect. When i take a snap by holding the phone Up, it gives me orientation of Left. Has anyone experienced this issue?
The UIImagePickerController dictionary shows following information:
{
UIImagePickerControllerMediaMetadata = {
DPIHeight = 72;
DPIWidth = 72;
Orientation = 3;
"{Exif}" = {
ApertureValue = "2.970853654340484";
ColorSpace = 1;
DateTimeDigitized = "2011:02:14 10:26:17";
DateTimeOriginal = "2011:02:14 10:26:17";
ExposureMode = 0;
ExposureProgram = 2;
ExposureTime = "0.06666666666666667";
FNumber = "2.8";
Flash = 32;
FocalLength = "3.85";
ISOSpeedRatings = (
125
);
MeteringMode = 1;
PixelXDimension = 2048;
PixelYDimension = 1536;
SceneType = 1;
SensingMethod = 2;
Sharpness = 1;
ShutterSpeedValue = "3.910431673351467";
SubjectArea = (
1023,
767,
614,
614
);
WhiteBalance = 0;
};
"{TIFF}" = {
DateTime = "2011:02:14 10:26:17";
Make = Apple;
Model = "iPhone 3GS";
Software = "4.2.1";
XResolution = 72;
YResolution = 72;
};
};
UIImagePickerControllerMediaType = "public.image";
UIImagePickerControllerOriginalImage = "<UIImage: 0x40efb50>";
}
However picture returns imageOrientation == 1
;
UIImage *picture = [info objectForKey:UIImagePickerControllerOriginalImage];
Best Answer
I just started working on this issue in my own app.
I used the UIImage category that Trevor Harmon crafted for resizing an image and fixing its orientation, UIImage+Resize.
Then you can do something like this in
-imagePickerController:didFinishPickingMediaWithInfo:
This fixed the problem for me. The resized image is oriented correctly visually and the imageOrientation property reports UIImageOrientationUp.
There are several versions of this scale/resize/crop code out there; I used Trevor's because it seems pretty clean and includes some other UIImage manipulators that I want to use later.