IPhone 11 models have unprecedented hardware to capture and process better photos and videos. But you can choose not to participate in or control two of these features: Deep fusion and Smart HDR.
Both features try to use many images captured continuously for very short periods to synthesize a photo with a wide dynamic range, especially to avoid burst highlights and muddy shadow details, while preserving fine details such as hair, hair or textures.
Smart HDR is an improvement on previous HDR approaches built into iOS for years. It requires more processing power than previous forms and can be used on all iPhone 11 and earlier models: iPhone XR, iPhone XS, and iPhone XS Max. Smart HDR enters more photos than previous HDR flavors.
Deep Fusion relies heavily on machine learning to work at the pixel level rather than providing further improvements in the region. It can also manage the addition of detail and dynamic differentiation in photos that have overall halftone values that HDR tends to perform poorly or does not help. Deep Fusion requires the A13 Bionic processor present in iPhone 11 models only. Deep Fusion Photography has been added in iOS 13.2.
You can disable Smart HDR with a key on all compatible phone models at Settings> Camera> Smart HDR.
Deep Fusion, however, lacks a switch. But because of what cameras require, it won't work if the wide-angle lens is in use on an iPhone 11 model. Settings> Camera> Capture Non-Quadratic PhotosTurning Deep Fusion off as a result, because this excessive capture mode requires the use of the ultra lens.
Here's how you can find out or choose which photographic enhancement algorithm to activate.
Overcapture photos off, Smart HDR on. Deep Fusion is triggered to capture images in low to medium light conditions in most cases; Smart HDR captures other photos in which analysis shows you to improve them. In a small number of cases, iOS will invoke neither Deep Fusion nor Smart HDR.
Excessive photo capture enabled, Smart HDR enabled. Smart HDR be enabled when appropriate, usually for low light and very bright photos.
Overcapture photos off, Smart HDR off. While Apple still uses mojo to choose the best image when you signal the shutter – the camera is always capturing temporary images – it does not combine multiple exposures or image elements to produce a better photo.