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Any links / guidance on how to iterate and log raw pixels of an image using swift in iOS?

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I'm trying to work on raw pixels of an image using swift language in iOS development. My target is to iterate and log pixel values / color space information of image using CGContextDrawImage and CGContextRef methods. Like the output in attached screenshot. Can anyone guide me through this ? I so far haven't come across a solution.

enter image description here

ios swift cgcontext cgcontextdrawimage
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