In the current field of drones, "binocular stereo vision function" (referred to as binocular function) has been paid more and more attention, becoming the standard and propaganda point of many new products. According to industry insiders, the binocular function allows the drone to better identify the surrounding environment during flight, which is conducive to obstacle avoidance and flight. The market demand for this function in the unmanned system field is very large.
Drone/graph source network
What is "binocular stereo vision"?
Binocular Stereo Vision is an important form of machine vision. It is based on the parallax principle and uses the imaging device to acquire two images of the measured object from different positions. By calculating the positional deviation between the corresponding points of the image, A method for obtaining three-dimensional geometric information of an object. Combining the images obtained by the two eyes and observing the difference between them (parallax images) allows us to obtain a clear sense of depth, establish the correspondence between the features, and map the points of the same spatial physical point in different images.
Binocular vision positioning system demonstration map / map source network
To put it simply, it is to use two cameras to simulate the effect of the two eyes of the person, so as to determine the target three-dimensional information, to achieve the purpose of effective obstacle avoidance. According to industry insiders, in the measurement of moving objects (including animals and human bodies), since image acquisition is done in an instant, the stereo vision method is a more effective measurement method. In addition, binocular technology is also one of the key technologies of computer vision. The distance information of acquiring three-dimensional scenes in space is also the most basic content in computer vision research.
It is reported that because the binocular vision function can make the smart device have the depth perception ability to the environment, it has broad application prospects in the fields of drones and intelligent robots.
"Binoculars" gradually become standard
With the increase in the intelligence of products in the field of unmanned systems, users' demand for optimization and improvement of many performances has increased, and the demand for binocular functions capable of timely sensing obstacles and effectively avoiding obstacles is increasing.
As early as last October, Zero Intelligence launched a total solution for binocular vision depth recovery based on the LC1860 platform.
In March of this year, Dajiang Phantom 4 released by Dajiang Innovation used a stereo vision positioning system consisting of a binocular vision sensor and a set of ultrasonic sensors. The accuracy of hovering is fundamentally solved, and the function of stable flight in a complex environment is realized.
Dajiang Elf 4/Figure source network
At the GTC, the world's technology event held in Silicon Valley in April this year, the head of the domestic intelligent drone company Brisky Space (BriSky) said that by embedding NVIDIA's GPU, the Brisky UAV has dual The vision system provides powerful defogging, target recognition tracking, automatic obstacle avoidance, night vision enhancement, and 3D real-time reconstruction.
Binocular vision/map source network of Borui Space
Recently, Pegasus Robot launched its first consumer-class drone - J.ME. It is reported that the J.ME drone is equipped with a binocular obstacle avoidance function. When there is an obstacle in front of the indoor flight, J.ME can brake intelligently and automatically hover and wait for the owner's next instruction.
Recently, the service provider of the UAV plant protection and drone integrated solution has released its binocular vision module "Tianmu", which aims to help the drone to operate while using the binocular system to sense the surrounding environment. Effectively avoid obstacles or hover in time to avoid damage caused by accidental collision.
From "binocular" to "binocular plus"
Recently, at the 18th Hi-Tech Fair Unmanned System Exhibition, Yuchen.com interviewed Wang Jidong, the general manager of Shenyang Shangbo Zhixiang Technology Co., Ltd. Wang Jidong told reporters that many companies have come to the door and put forward the demand for "binocular visual function".
Wang Jidong said that at present, Shangbo Zhixiang has launched a "binocular vision module" that can output depth maps and is open to the public. The backend can get the front-end data for post-processing whether it is for terrain planning or 3D modeling. "This will ensure the choice and planning of the autonomous system's autonomous path. We can also recommend a route in the depth map according to the specific needs of the user, to inform the unmanned system of the farthest point in the forward field of view, and also to guarantee the primary. The automatic avoidance." Wang Jidong said that through the "binocular vision function" to achieve the visual odometer function, record the trajectory of the unmanned system movement.
UAV's binocular vision system / map source network
Wang Jidong told Yuchen.com that the company is using binocular ranging to make a terrain-high flight mode to prevent the aircraft from hitting the ground or other obstacles. So far, binocular is a more reliable way because the radar consumes power and the ultrasonic accuracy is poor.
"We want to make the chain and the flight control form a chain, and combine the binocular and the flight control system into one. If an aircraft has a flight control at the same time, a terrain follower, plus a front binocular obstacle avoidance system, There will be a strong market competitiveness." Wang Jidong told Yuchen.com that this work is currently underway and is expected to be available soon.
Wang Jidong said that in the context of "Made in China 2025" and "Industry 4.0", the industry in the field of machine vision has a market share of 20 billion in 2015, increasing at a rate of 20% per year, and a rapid period from 2015 to 2020. The development period will reach a peak in 2020, and the market share will reach 150 billion. This will be a very broad blue ocean market where companies can do much.
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