How do I read an image from file for use with the `PyObjC Vision` framework?

问题

I am trying to detect and decode barcodes from a library of images. In most cases pyzbar simply works (see code here).

However, in some cases, my iPhone can decode the QR code but zbar fails. As I am on a mac, I can make use of the same Vision framework that the iPhone uses and there are even python wrappers to the macOS ObjC frameworks.

I tried using Quartz.CGImageSourceCreateWithURL but that returns a None no matter what I pass it.

def read_image(path):
    imageSrc = Quartz.CGImageSourceCreateWithURL(path, None)
    image = Quartz.CGImageSourceCreateImageAtIndex(imageSrc, 0, None)
    return imageSrc, image

print(read_image(path))

Out: (None, None)

I have tried relative and absolute paths, I've tried internet URLs. Nothing.

Can someone help me get started with this?

来源：https://stackoverflow.com/questions/65089059/how-do-i-read-an-image-from-file-for-use-with-the-pyobjc-vision-framework