Door Detection in iOS 16 for Blind and Low-Vision Users

Door Detection is an accessibility feature introduced in iOS 16 designed to help blind and low-vision users independently navigate unfamiliar environments. Built into the Magnifier app, this tool leverages machine learning and the LiDAR Scanner on supported iPhone and iPad models to locate doors, determine their distance, describe their attributes, and read surrounding signs. By translating visual information into spoken descriptions and haptic feedback, Door Detection acts as an advanced navigation aid for the final few steps of reaching a destination.

Hardware Requirements and Technology

Door Detection relies on the LiDAR (Light Detection and Ranging) Scanner combined with the device's camera and on-device machine learning. Because of the specialized sensor requirement, the feature is available exclusively on Pro models, specifically the iPhone 12 Pro, iPhone 13 Pro, iPhone 14 Pro (and later Pro variants), as well as compatible iPad Pro models. It operates within Detection Mode inside the native Magnifier app.

Locating Doors and Measuring Distance

When a user points their device toward a hallway or room, Door Detection scans the area in real time. It confirms the presence of a door and alerts the user to its precise distance in either feet or meters. As the user walks forward, the system continuously updates the measurement, allowing individuals with low or no vision to approach doorways with confidence and avoid collisions.

Identifying Door Attributes and Mechanics

Beyond locating a door, the feature analyzes and announces critical functional details:

• Status: It indicates whether the door is currently open, partially open, or closed.
• Operation Method: It informs the user whether the door needs to be pushed or pulled to open.
• Hardware Type: It detects the specific handle type, identifying whether the door features a standard knob, a lever, a pull handle, or a push bar.

Reading Text and Accessible Signs

Door Detection uses optical character recognition (OCR) to read information printed directly on or around the door. This capability allows users to hear room numbers, office occupant names, restroom identifiers, and accessibility symbols read aloud. It eliminates the need for physical braille searches or guessing when navigating complex indoor facilities like hospitals, hotels, and office buildings.

Multisensory Feedback System

To communicate findings safely and clearly, the feature offers customizable feedback options:

• Spoken Audio: VoiceOver reads detailed descriptions and measurements.
• Haptics: Vibration patterns change in frequency and intensity as the user gets closer to the door.
• Sound Cues: Distinct audio tones shift in pitch to indicate alignment and proximity.

Users can combine these feedback channels based on their personal preferences or environmental noise levels, making it a reliable navigational aid for independent travel.