Why Exactly Is The Dot Projector Used In The Facial Recognition System Of iPhone X?
The dot projector, a component of the TrueDepth camera system on the iPhone X, is a light source that projects 30,000 infrared dots onto the user’s face along with other ‘invisible’ light. These are then read by sensors to create an accurate 3D model of your face. This technology allows for more precise and accurate measurements for things like depth, lighting and geometry. There are a number of different kinds of projectors, each with their own qualities and advantages. The dot projector in the iPhone X uses a ring light around the camera lens to project light onto your face. In order to get the most accurate 3D data and image from the iPhone X’s TrueDepth camera, it is necessary for that light source to be as close to identical in size and intensity as possible.
What Is Dot Projector?
A dot projector is a light source that projects bright dots of different colors onto the subject area along with other invisible light. It is used in facial recognition systems like Face ID on iPhone X. The dot projector also works for mapping and 3D scanning services. It is used in autoradiography, which is a technique used in photography to transfer images from one medium to another. Dot projector also comes in different forms like ring lights, panlights and strip lights.
How Face ID Works Using Dot Projector?
The general idea of facial recognition has been around for a while and is not new. The technology used in the system, however, is relatively new to the public. Facial recognition systems are built using a variety of data collection techniques.
One technique is what Apple calls “Structured Light.” This technique projects light onto the human face and collects the resulting reflections using an infrared camera. The collected data is stored in a separate place. The dots from the data are then matched against each other. This technique has been used in hospitals and security systems for years now.
A mask used by facial recognition is constantly shifting to collect more precise data on a human face. They have four different stages that the mask undergoes:
The first stage is the positioning of the dot projector; it must be precisely placed on the face before collecting any data. This is done by using an Apple TrueDepth camera capable of projecting the initial pattern on the front. Once this has been projected, a time-of-flight sensor analyzes the light and collects a distance map of the face. This map then uses these distances to create a 3D model of the human face. In addition, the masking patterns are used in conjunction with this model to create an entirely new set of dots.
The second stage happens immediately after the collection of the map. The system analyzes the face and begins collecting data on specific dots that it identifies in each area. These areas are chosen through various factors, including analyzing the distance between certain points, their purpose on the human face and their relation to one another. This collection of data continues until the next phase begins.
This is the final phase where the 3D model is built from the data collected. The dots collected in this stage are then matched up against one another, with their locations maintained in a database, normally an iCloud database. This matching process can be performed using several different techniques, depending on the needs of that particular system.
Use of Dot Projector in Face ID Recognition
Although Face ID is the name of the technology which uses the Dot Projector in iPhone X, Dot projectors are used in many other fields.
The main purpose of the dot projector is to produce a high-resolution image of a face from short distances. The kind of resolution required is determined by how close people need to be before they can be recognized. For example, in airports for identification purposes, people must stand only a couple of meters away before an image could be captured. In other situations, such as with the iPhone, people have to be able to be close enough for the sensor to capture data.
The dot projector is one of the most critical components in the facial recognition system. The system, however, cannot function without these masks. The masks will move and shift their position to adapt to any changes on a person’s face.
In addition to moving, a mask may enlarge or reduce certain face areas to make the image more accurate. This technique allows the system to capture greater amounts of data that would have otherwise been missed if it was not adjusted to obtain greater accuracy.