types of car cameras?
1. Composition of on-board camera
The hardware structure of the on-board camera includes optical lens (optical lens, filter, protective film), image sensor, image signal processor (ISP), serializer, connector and other components. The working principle is that the target object generates an optical image through the lens and projects it onto the image sensor. The optical signal is converted into an electrical signal, which is converted into a digital image signal through A/D (analog digital conversion) and sent to the DSP (digital signal processing chip) for processing. The DSP processes the signal into a specific format image and transmits it to the display screen for display.
2. Type and function of on-board camera
According to the installation location, the vehicle mounted cameras can be divided into five categories: interior camera, rear camera, front camera, side camera, perimeter camera, vân vân; According to the structure, the vehicle cameras can be divided into monocular cameras, binocular cameras, wide-angle cameras, vân vân.
- Front view camera: most resolutions are 1080P and above
FCW (Forward Collision Warning): FCW monitors the distance from the vehicle in front in real time and warns the driver when there is a potential collision danger
LDW (Lane Departure Warning): LDW recognizes the lane line information through the camera, and the system will give a warning when the vehicle unintentionally departs
PCW (pedestrian anti-collision warning): PCW realizes pedestrian monitoring and warning function
TSR (Traffic Sign Recognition): TSR displays the road signs ahead identified by the camera through the instrument and gives corresponding warning information
LKA (Lane Keeping Assist): LKA helps to correct the driver’s unintentional lane departure behavior, so that the vehicle can return to the original lane
ADB (adaptive high beam lamp): ADB identifies vehicles in the same direction with the front through the camera, and automatically switches the high beam illumination range to avoid dazzling other vehicle drivers
ACC (Adaptive Cruise Control): ACC detects the distance between the vehicle in front of the lane and the vehicle in front of it, and cruises according to the set maximum speed and the distance between the two vehicles
DASH CAM: It can record the road conditions in front of the vehicle in real time. The resolution is 720P or above
Night vision camera: use infrared camera to collect the thermal information of surrounding objects and convert it into visual images to increase the safety of driving at night, with a resolution of 480P
(2) Rear view camera:
The resolution is 480P or above. Reversing video streaming rearview mirror: when the car is in reverse gear, the camera will open and obtain the rear condition, which will be displayed on the LCD screen of the central control or rearview mirror
(3) Look around camera:
The resolution is 480P or above. 360 panoramic view and automatic parking: collect the surrounding image data through multiple cameras on the vehicle, generate a 360 degree bird’s eye view of the vehicle body, and display it on the central control display screen to assist the driver in parking
(4) Side view camera:
The resolution is 720P or above. Blind spot monitoring and lane change assistance are installed under the rearview mirror to detect vehicles in the blind spot area behind the side
(5) Interior camera:
The resolution is 720P or above. Driver fatigue monitoring and identification, safety video. The driver’s face is photographed dynamically for recognition, realizing driver identification, fatigue monitoring and dangerous driving behavior monitoring; Safety videos can also be made in commercial vehicles
3. Car camera company
(1) Sunny Optics: the world’s leading supplier of vehicle cameras. The company entered the field of vehicle cameras in 2004, and its shipment volume has been ranked first in the world since 2012.
- OFIG: a domestic optical leader, has entered the leading city of intelligent cars in 2015 and is a domestic Tier 1 supplier of finished vehicles. In 2018, through the acquisition of more than 300 patents of Fuji (Tianjin) factory and vehicle lens, the industrial chain layout of vehicle lens was improved.
- Huacheng Automobile: In 2018, the company accelerated the development and application of 360 ° automobile driving environment scanning system and other products, and explored the establishment of a full-featured business development platform covering millimeter wave radar, camera and data fusion.
- Lianchuang Electronics: In 2018, the R&D vehicle lens passed the certification of Mobileye, the vision leader of ADAS. So far, three lenses have passed the certification. In addition, the company has been successfully passed; Valeo and other European mainstream ADAS Tier1 manufacturers have signed supply contracts with several European Tler1 manufacturers in the field of look around and reverse image.
- Fuhanwei: launched the first domestic car specification level ISP chip FH8310 with more than one million pixels, broke the monopoly of overseas manufacturers, and cooperated with BYD for mass production.
- Baolong Technology: In February 2019, it released a number of new dynamic vision products for cars, and began mass production. Its customers include SAIC passenger cars, DPCA, Dongfeng Liuqi, Chery, vân vân.
- Weir Shares: acquired Howell Technology, the world’s third largest CMOS image sensor supplier, in 2019
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