Model Disrespects Image Orientation

[Michael Verges]

CGImage has no reference to the capture orientation. This affects the stitching process for images taken on device (screenshots and web-images are unaffected).

Attempted solution in IRIS/ImageTransfer:

UIImage(
    // the patch
    cgImage: croppedImage,
    scale: 1.0,
    // attempt to orient the patch by copying the orientation of the original image
    orientation: inputImage!.imageOrientation 
).draw(in: rect)

This has no effect.

Example:

[Michael Verges]

Solution:

extension of UIImage:

func reoriented() -> UIImage {
    if self.imageOrientation == .up { return self }
    UIGraphicsBeginImageContext(self.size)
    self.draw(at: .zero)
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return image ?? self
}

Reorient every UIImage with any orientation before the transfer.
This writes a new CGImage that is naturally .up when used in UIImage.