This article chooses a domestic AR glasses product, the manufacturer will not talk about it, let's get into the main topic below:
HiAR Glasses
1. Hardware1.cpu:
Since the official announcement is that the cpu adopts a quad-core structure, and the gpu is a mali dual-core structure, I estimate that MediaTek’s MTK6732 should be selected, [parameters: 4-core A53 CPU, L2 Cache is 512k, integrated GPU is ARM MALI-T760 MP2 graphics The processor runs at 500MHz.] The overall performance should be similar to Qualcomm's Snapdragon 600. If the guess is true, the computing power of HiAR Glasses is slightly weaker. The AR display computing is sufficient for the time being. Considering that the device needs to pass a depth sensor To realize the interactive function, the computing power provided by this cpu seems a bit thin. (Of course, the author does not rule out the use of co-processing methods like Microsoft [although this possibility is extremely small] to reduce the burden on the CPU of the entire platform.)
2. Display module:
The official model did not announce the specific model, but only announced the resolution index of 1024*768 (readers please automatically ignore the slogan below), according to the information released by Sony, the selected model should be ECX331A (because this model was released earlier, it is not ruled out The manufacturer specially customized the improved version). Here I am concerned about the brightness index. Through the X degree, I learned that the brightness of this module is about 200cd/m2, and the screen brightness of GALAXY S6 edge is about 550cd/m2. Based on this foundation The author believes that the brightness of the display module of this model used for AR is somewhat low. In order to improve the display effect of the virtual screen, the effect can only be improved by adding filter lenses to block more external light.
3. Optical components:
Looking at the optical structure from the promotional image, the author estimates that the principle of total reflection or refraction should be adopted to achieve near visual range imaging. This structure has a higher light utilization rate for the display module (compared to the semi-reflective method of Google Glasses). However, none of the prism display solutions can avoid the following two problems, namely: the dispersion problem of the prism on the displayed virtual picture, and the picture distortion problem of the real picture due to refraction. I haven't tried it on. I don't know the effect of the manufacturer's optimization, so I won't make an evaluation here. For another indicator FOV, the manufacturer claims to be three times that of Google Glass, which means that it can achieve a viewing angle of about 36 degrees. This indicator is not much different from the viewing angle provided by HoloLens. According to the data published on the Internet, the approximate effect is as shown in the figure below. It must be impossible to play games.
4. Input part:
According to the information released by the claimed film, the manufacturer has adopted 4 sets of plans:
1. External touchpad;
2. 9-axis gyroscope sensor;
3. Depth camera;
4. Visual AR technology.
First of all, the manufacturer has equipped an external device with a "suspected trackpad" device. The author speculates that the device adopts the 2d mode at the system level. AR is mainly used as an application, so the manufacturer provides the touchpad input according to the operating habits of the Android system. Equipment; 9-axis gyroscope should be used for real-time positioning of head posture as a compensation solution for AR posture tracking (the author will elaborate on AR posture tracking in the software section); depth camera and core AR vision technology are in the manufacturer’s promotional video It is introduced in hardware. The author understands that it should be a solution that combines software and hardware, but unfortunately the manufacturer has not provided any technical details. The author speculates that this should be the manufacturer’s technical upgrade interface. It should not be mature yet (it is estimated that the manufacturer I don’t know too.) It’s not difficult to see from the following news pictures that I still rely on the touchpad to operate the device.
5. Outer filter
Regarding the hyperboloid diffuse reflection lens, the author has been thinking about it for a long time and cannot understand how the hyperboloid is? And what diffuse reflection is it for? For the time being, think it is the manufacturer's modified advertising word based on the declared need. In the author's opinion, the role of this lens is to reduce the external light penetration rate and reduce the brightness difference between the display components to achieve the purpose of improving the visual experience.
5. Mirror legs
Everyone has their own loves in industrial design, so let's play it out! The author's doubt here is: how to solve the balance problem of the whole glasses by focusing all the components on the frame? The manufacturer is too concentrated in the use of space, and the space of the temple is basically not used. In addition, are you anxious to talk about craftsmanship, technology and art as a prototype model?
2. Software:1. System:
Based on Android, from the perspective of retaining the design of the touchpad, it is unlikely that manufacturers will develop a separate 3d interactive interface. The author also explained above that the operation of the device at the system level is still based on the 2d mode of the touchpad. The author has I tried to connect the phone to the head-mounted display, even if the Android touch point display function is turned on, the operation is very weird.
2. sdk:
The information provided on the official website provides 4 versions of sdk. At present, only unity has launched a trial application, and none of the others are online. [Here I have always been confused: how to use the ios version of the sdk? After all, the system of the product is based on Android (Is there glasses based on IOS in the future?)], get back to business, from the development videos published on the official website, it can currently achieve a function similar to Qualcomm Vuforia, that is, through the recognition of feature images to achieve enhancement Realistic functions, strictly speaking, the functions that the SDK can provide are only limited to the level of gimmicks [see the figure below for details].
Whether the product is of low maturity in hardware or software, it is difficult to include it as a prototype. Most of the functions mentioned in the claim stay at the level of storytelling. There is a suspicion of transition claims. The author speculates that the team’s focus is still financing. Finally, the author's advice to developers is: the first generation product (if any) is not recommended to start, but you can continue to pay attention.
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