Core Image

Use built-in or custom filters to process still and video images using Core Image.

Core Image Documentation

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How to calculate smoothness to replicate CALayerCornerCurve.continuous?

iOS 26 added smoothness to CIRoundedRectangleGenerator, for use with CIFilter.roundedRectangleGenerator. What should the smoothness value be to achieve the same corner curve as CALayerCornerCurve.continuous? Does it need to be calculated based on the extent size, if so, how?

Media Technologies Photos & Camera iOS Beta Core Animation Core Image

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Jun ’25

Editing portrait photo causes CINonLocalizedDescriptionKey error 3

Some users have reported an error editing portrait photo assets in my app: The operation couldn’t be completed. (CINonLocalizedDescriptionKey error 3.) What is that error? Will affected photos always encounter this error (due to data corruption for example) or can it be resolved in a future iOS update? FB16241301

Media Technologies Photos & Camera iOS Camera PhotoKit Core Image

207