When it comes to car collision avoidance systems using cameras, the most famous in Japan is Fuji Heavy Industries' "EyeSight". But there is another company that holds 70% of the global share in the market, and that is Mobileye, which implements an anti-collision system with only one camera. Although the company's headquarters is located in the Netherlands, it has as many as 300 technicians in the Israeli development base. In this article, the company's head of research and development will introduce you to the current status of this company that has been followed by car manufacturers around the world, and the technical content centered on image recognition.


The location of the camera on the photo is a schematic diagram, which does not comply with Japanese safety standards. Japan ’s Ministry of Land, Infrastructure, Transport and Tourism ’s safety standards “Article 29, Paragraph 4 and 195, Paragraph 5” stipulates the camera installation position, requiring the distance between the camera and the upper and lower ends of the front window to be within 20% of the window height, or blocked by the rearview mirror s position.

The mobile anti-collision alarm system "MobileyeC2-270" that we developed using a monocular camera has been sold to 42 countries around the world. In Japan, sales and installation services for enterprises were started in 2011, and services for individuals were also launched in April 2012.

In Japan, Mobileye's auto parts products are sold by i-mobile. The company was founded in July 2011 and is the general agent of Japan importing Mobileye products. Including the installation fee, the price of "Mobileye C2-270" is 135,000 yen.

Among the anti-collision systems using cameras, Fuji Heavy Industries' "Eye-Sight", which is known as a "non-collision car", is the most famous in Japan. This technology uses two cameras to detect vehicles and pedestrians, and also has an automatic parking function after an alarm.

But throughout the world, Mobileye topped the list with a camera share of more than 70% in the anti-collision system market using cameras. We first engaged in the business of supplying single-eye camera image processing SoCs with European automakers as the center. Later, in 2006, we established the business of assembling the final products by ourselves and selling them in the auto parts market.

The image processing SoC "EyeQ2" we developed has been applied to the new BMW "1 Series" anti-collision alarm function and the Swedish Volvo system. In addition, it is also adopted by the world's major auto manufacturers such as General Motors (GM) and Ford (Table 1). Recently, we are still developing in cooperation with Japanese companies.


5 warning functions

The main functions of Mobileye C2-270 include collision warning with front vehicles and pedestrians, lane departure warning, and distance warning (Figure 1). Not only can the alarm beep, but also to the driver through the display device. The specific alarm functions include the following 5 types: (1) Front vehicle distance monitoring and warning (HMW); (2) Front vehicle collision warning (FCW); (3) Front vehicle collision warning at low speed (UFCW); (4) Pedestrian Collision warning (PCW); (5) Lane departure warning (LDW).

Figure 1: Warning 5 dangers

The display device that issues a warning through visual information can display the vehicle distance (vehicle distance / second speed) in seconds, as well as the vehicle in front, pedestrians, and lane deviation.

(1) Monitoring and warning of the distance ahead of the vehicle, showing the value obtained by dividing the distance between the vehicle and the vehicle in front by the vehicle's second speed. When the distance from the vehicle in front is less than 2.5 seconds, the display will show the number of seconds in the distance. When the vehicle distance is less than the preset number of seconds, the icon representing the vehicle will turn red, and an “beep” alarm beep will sound. The maximum detection distance is about 90m.

(2) The collision warning of the vehicle in front, the vehicle icon will turn red 2.7 seconds before the collision may occur, and a "beep beep beep" alarm will be issued loudly to remind the driver to apply the brake.

(3) The collision warning of the front vehicle at low speed is also called a virtual bumper. Set a virtual bumper 1 to 2m in front of the vehicle bumper in advance. When the speed of the vehicle is less than 30km / h, the "beep, beep" alarm will sound when the front vehicle approaches the distance touching the virtual bumper sound. Its role is to prevent collisions in traffic jams and waiting for traffic lights.

(4) Pedestrian collision warning, when this function detects a pedestrian within 30m in front of it, it will first silently light up the red pedestrian sign, and issue a "beep-beep-" 2 seconds before the pedestrian may enter a dangerous distance and a collision may occur Beep.

(5) Lane departure warning. When the car reaches 55km / h or more and leaves the lane unintentionally, the display will show the sign of deviating from one side of the lane, and at the same time issue the warning sound of "beep beep beep". If the turn signal is turned on and the lane is changed, it is judged as intentionally deviating from the lane, and no alarm sounds and no icon is displayed.

As described above, since the warning sound of each warning is different, after familiarization, the driver can judge the type of warning based on the sound without looking at the display device.

Accident prevention rate is close to 100%

The effectiveness of our collision warning system in reducing the number of traffic accidents has been verified. The investigation was carried out by Swiss AXA Winterthur. Insurance companies also hope to reduce accidents by installing anti-collision systems for cars and reduce the amount of insurance money for accident compensation.

The survey revealed the relationship between the time when the brake was detected and the incidence of accidents (Figure 2). The survey results show that for a forward collision, if you can detect the danger 2.0 seconds in advance and notify the driver, you can basically prevent 100% of the accident. In view of this situation, major insurance companies in Europe such as AXA have launched premium discounts on condition that they are equipped with the company's anti-collision alarm system.

Figure 2: As long as the alarm is issued before 2 seconds, the accident rate can basically be reduced to zero

If an alarm is issued before 0.5 seconds of an accident, the probability of collision is more than 35%. If it is more than 2 seconds in advance, most accidents can be prevented. (Picture: "Nikkei Electronics" produced based on the information of Fengtai Insurance)

The anti-collision warning system actually helps to improve driving skills. When it was first installed, the alarm sounds kept ringing. After a few weeks, the number of alarms would suddenly drop to less than half (Figure 3). Because once the driving error occurs, the system will notify the driver through sound and display, so that he can naturally grasp the correct driving method. This not only helps improve the driving level, but also contributes a lot to improving fuel efficiency. (Special contributor: Gideon Stein, Chief Research ScienTIst of Mobileye in the Netherlands; Shi Chuan Yumin, person in charge of i-mobile technology and after-sales)

Figure 3: Halve the number of alarms within 3 weeks

Since the delivery of Coca-Cola Europe Group's distribution vehicles has installed Mobileye's anti-collision warning system, the driver's driving level has been significantly improved.

There are other examples to verify the effectiveness of the anti-collision warning system. For example, a transportation company in the United States verified and compared the impact of installing the Mobileye system on the cost of traffic accidents. The results show that for every 100 miles (160 km) travelled, the accident rate for unequipped cars is 1.4 times higher than for equipped cars. If it is converted into the cost of the accident, the anti-collision system can save about 1.3 million yen.

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