The width/height rate of the photos from UIImagePickerController on iPhone

I thought the iphone width/height size is 320 * 480. But the photo taken from UIImagePickerController is abou开发者_Python百科t 320 * 430.

Not sure whether I missed anything.

picker = [[UIImagePickerController alloc] init];
picker.showsCameraControls = NO;
picker.allowsEditing = YES;

[window addSubview: picker.view];

Any advices? Thanks.

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It appears the picture size rate is 640 * 480. Assume the shorter line is width, I used :

h = 320.0f * heightFromImage / heightFromWidth;

heightFromImage is 640 and heightFromWidth = 480.

The saved image looks correct.