Natural Photo

A Three-Year Quest for iPhone Images That Don't Look Like iPhone Images

Description

Update: Now available on the App Store! iPhone photos have a look. You know it at a glance: the aggressive sharpening, the HDR tone mapping, the processed feel. Natural Photo bypasses that entire pipeline. It captures the raw sensor data, applies cinema-derived color science I developed from years of studying film stocks and digital cinema cameras, and outputs stills that people consistently refuse to believe came from a phone. Preserved highlights, natural roll-off, no editing required.

More context

Natural Photo comes from a specific frustration. I liked what Apple Log video could do on an iPhone, but Apple only exposed that look through video. For still photos, I was literally pulling screenshots from graded footage because they looked better than the native camera output.

The shipped app uses a dual-path camera system. One path feeds the live preview, transforming frames through my LUT in real time with Metal. The other records Apple Log to disk. When you tap the shutter, the app extracts a frame, applies the same color science, and saves the result so the preview and final image match.

The hardest bug was not the camera. It was color conversion. Saving through the normal UIImage path silently changed the color space and made the image look wrong, oversaturated, and gamma-shifted. The fix was to bypass that path entirely, render the data directly, and save 16-bit HEIC so highlight gradients stayed clean.

The app also protects highlights automatically. It watches the histogram at 10Hz, drops exposure quickly when pixels approach clipping, and recovers slowly when the frame gets too dark. The goal is not neutrality. The goal is making iPhone stills look like the images I actually want to make.

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JW
Justin Wetch