It is undeniable that the current true AR hardware cost is very high, and the smartphone AR experience provided to users is still at a very crude level.
Various forms of AR hardware
Handheld devices
The representative of handheld devices is a smartphone that naturally contains all the elements that AR needs: gyroscopes, gps, cameras, and powerful processors. However, smartphones still have significant limitations in terms of interaction.
Fixed AR equipment
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The fixed AR system is suitable for scenes that require a larger display or higher resolution in a fixed location. Unlike mobile AR devices, these less mobile systems can be equipped with more advanced camera systems, so they can more accurately identify people and scenes.
Head mounted display (HMD)
HMD represents another rapidly growing AR hardware type. The HMD consists of a headgear (such as a helmet) and one or more (micro) displays that are paired with it. The HMD overlays the images of the real world and virtual objects in the user's field of view. In other words, the user does not directly see the reality, seeing the actual enhanced video picture.
Space Augmented Reality System (SAR)
The virtual content of the Spatial Augmented Reality (SAR) system is directly projected in the real world. SAR systems are often fixed in nature. Any physical surface, such as walls, tables, foam, wood blocks, or even the human body, can be an interactive display. As projection equipment size, cost, power consumption, and 3D projection continue to advance, new forms of interaction and display are emerging.
Smart glasses
Smart glasses are actually an integrated device with glasses, screens, cameras and microphones. According to this concept, the user's real-world perspective is intercepted by the AR device, and the enhanced screen is redisplayed in the user's field of view. The AR image enters the eyeball through the spectacle lens or through the spectacle lens. The most prominent examples of smart eyewear technology are Google Glass and the Vuzix M100.
AR product system structure
Virtual model output real world
AR hardware key technology
1. Object detection and recognition
The purpose of object detection and recognition is to find and find targets in the scene. In the field of augmented reality, common detection and recognition tasks include face detection, pedestrian detection, vehicle detection, gesture recognition, biometric recognition, emotion recognition, and natural scene recognition.
Technical Difficulties: Lack of sufficient data to reach the mature stage of deep learning.
2, augmented reality display technology
The video perspective helmet display obtains an image of the external real environment through a miniature camera mounted on the helmet, that is, the camera captures the image of the real scene for transmission.
The basic principle of the optical principle perspective helmet display is to present a real scene and a virtual scene through a pair of semi-reverse half lenses mounted in front of the eyes.
This display mode of not using the screen as a carrier completes the display of the virtual object by recording and reproducing the light field. By presenting images of different depths, the user can achieve active focusing when viewing close-range or distant scenes, which is also a major advantage of light field display.
Technical difficulties: each program has its own advantages and disadvantages, and the light field technology is worth looking forward to.
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