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A dashboard camera or simply dashcam, also known as car digital video recorder (car DVR), driving recorder, or event data recorder (EDR), is an onboard camera that continuously records the view through a vehicle's front windscreen and sometimes rear or other windows. Some dashcams include a camera to record the interior of the car in 360 degrees inside camera, usually in a ball form, and can automatically send pictures and video using 4G.
EDRs and some dashcams also record acceleration/deceleration g-force, speed, steering angle, GPS data, voltage of the power source (vehicle's electrical net), etc.
A wide-angle 130, 170° or more front camera may be attached to the interior windscreen, to the rear-view mirror (clip on), or to the top of the dashboard, by suction cup or adhesive-tape mount. A rear camera is usually mounted in the rear window or in the registration plate, with a RCA video output to the display monitor/screen.
The resolution will determine the overall quality of the video. Full HD or 1080p (1920×1080) is standard for dash HD cams. Dash cameras may have 1080p, 1296p (common for Chinese dashcams), 1440p, or higher definition for a front camera and 720p for a back camera and include f/1.8 aperture and night vision mode.
By targeted field of view:
Some cabin cams include a screen that can be attached to the rear-view mirror employing usually rubber rings or straps or as a direct replacement of the rear view mirror itself. Others attach to the windshield, dash, or other suitable interior surfaces
Many dashcams include rechargeable batteries not needed when connected to car battery wire or capacitors.
To ensure that recorded video files are not tampered with once they have been recorded, videos can be timestamped in a tamper-proof manner, a procedure termed trusted timestamping.
To ensure a reliable 24/7 parking surveillance when capacity is an issue, a motion detector may be used to record only when an approaching human/vehicle is detected, in order to save power and storage media. [1]
Advanced driver assistance system ADAS and park location save can be included.
Dashcams usually use class 10 or above MicroSDHC or MicroSDXC cards usually 16 GB or higher or internal memory to save videos.
The port to connect the GPS antenna can use a micro USB or 3.5 mm jack connection. The antenna is usually 1575 to 1568 MHz and 3.0 to 5.0 V.
GPS coordinate stamping capability is included in most dashcams (some need an external GPS antenna, but other dashcam systems have built-in GPS), and others include GPS (online and offline) navigation.
Some dashcams include Wi-Fi, Bluetooth, and 4G connectivity.
For Bluetooth and voice commands and recording, a built-in microphone is included.
4G triple-cam (also called triple-lens and three-way-cams) sets on rearview mirror are becoming more available (2 front cameras - one 170° to mainly record road, one 360° for sides and doors and a rear camera).
4G is used to send messages, calls, pictures, and videos in parking surveillance mode. Usually a second 360° camera is employed to record the car's sides front doors and windows and inside.
Also, 4G is used to send a message when the car battery is low.
Dashcam units usually operate via the vehicle electrical system, converting the 13.8V to a 5V USB connector. Dashcams can be plugged in via the cigarette lighter socket, or may be hardwired directly into the electrical system, freeing up the power outlet for other uses.
In order to store files and properly format the media card when power is turned off, dashcams use either a Lithium Polymer (LiPo) battery or a capacitor. While both provide power for a very short period of time, they have very different operating capabilities and limitations. LiPo batteries have an estimated life of 2-3 years or roughly 300-500 cycles. Over time, the material inside the battery will start to degrade resulting in out-gassing. This can be observed in a swollen or puffy looking battery case. When a LiPo battery reaches this point, the battery is no longer able to hold a charge. The result is a camera that may randomly turn on or off, or register format errors if it can't shut down correctly when power is turned off since it can only function when using the power from the vehicle. Capacitors can also store a temporary charge and will last much longer. They are also more resistant to higher operating temperatures, but are more expensive and require additional hardware or software support. Generally the LiPo batteries are found in less expensive dashcams and capacitors are used in more expensive dashcams.
Dashcams are widespread in Russia [2] as a guard against police corruption and insurance fraud, where they provide additional evidence. [3] They have been called "ubiquitous" and "an on-line obsession", and are so prevalent that dashcam recordings were the most common videos of the February 2013 Chelyabinsk meteor, [4] which was documented from at least a dozen angles. Videos showing automobile and aircraft crashes, close calls, and attempts at insurance fraud have been uploaded to social sharing websites such as YouTube, Facebook, Twitter, Yandex, and other websites.[ citation needed ]
In the United Kingdom, sales of dashcams rocketed in 2015, which was the fastest growing consumer electronic, with sales increasing by 395%. [5]
In China, dashcams were well known by a dramatic event of a road rage. [6] [ further explanation needed ]
Dashcams have also captured numerous aviation accidents, such as National Airlines Flight 102 in 2013, [7] TransAsia Airways Flight 235 in 2015, [8] the Shoreham Airshow crash in 2015, [9] and the catastrophic engine failure of United Airlines Flight 328 in 2021. [10]
Dashboard cameras have become the top feature wanted by future vehicle buyers, [11] and more car manufacturers are incorporating built-in camera systems. [12]
While dashcams are gaining in popularity as a way of protection against distortion of facts, they also attract negative attitudes for privacy concerns. This is also reflected in the laws of different countries in different and conflicting ways:
Police departments use dashcams in police vehicles to gather evidence during traffic stops and car chases. [23] Some dashcam systems can be automatically activated when a police car's emergency lights or siren are turned on. [24] [25] [26] Freedom of information laws mean that the footage can be released under some circumstances, [27] and this can be an important tool in reporting on police actions. [28] TV shows like World's Wildest Police Videos have frequently featured car chase videos shot from dashcams.
Some police officers accused of police brutality or misconduct tamper with their cameras to disable audio or video recording. [29] A report in 2016 showed that in Chicago, 80% of the police dashcams did not work properly. Among the causes were that officers destroyed antennas, hid microphones, and removed batteries or recording media. [30]
A traffic enforcement camera is a camera which may be mounted beside or over a road or installed in an enforcement vehicle to detect motoring offenses, including speeding, vehicles going through a red traffic light, vehicles going through a toll booth without paying, unauthorized use of a bus lane, or for recording vehicles inside a congestion charge area. It may be linked to an automated ticketing system.
A hidden camera or spy camera is a camera used to photograph or record subjects, often people, without their knowledge. The camera may be considered "hidden" because it is not visible to the subject being filmed, or is disguised as another object. Hidden cameras are often considered a surveillance tool.
Sousveillance is the recording of an activity by a member of the public, rather than a person or organisation in authority, typically by way of small wearable or portable personal technologies. The term, coined by Steve Mann, stems from the contrasting French words sur, meaning "above", and sous, meaning "below", i.e. "surveillance" denotes the "eye-in-the-sky" watching from above, whereas "sousveillance" denotes bringing the means of observation down to human level, either physically or hierarchically.
OnStar Corporation is a subsidiary of General Motors that provides subscription-based communications, in-vehicle security, emergency services, turn-by-turn navigation, and remote diagnostics systems throughout the United States, Canada, Chile, China, Mexico, Europe, Brazil, Colombia, Argentina and the Gulf Cooperation Council countries.
A police car is a ground vehicle used by police and law enforcement for transportation during patrols and responses to calls for service. A type of emergency vehicle, police cars are used by police officers to patrol a beat, quickly reach incident scenes, and transport and temporarily detain suspects, all while establishing a police presence and providing visible crime deterrence.
A rear-view mirror is a, usually flat, mirror in automobiles and other vehicles, designed to allow the driver to see rearward through the vehicle's rear window.
A GPS tracking unit, geotracking unit, satellite tracking unit, or simply tracker is a navigation device normally on a vehicle, asset, person or animal that uses satellite navigation to determine its movement and determine its WGS84 UTM geographic position (geotracking) to determine its location. Satellite tracking devices may send special satellite signals that are processed by a receiver.
A backup camera is a video camera specifically designed to be attached to the rear of a vehicle to aid in reversing and reduce the rear blind spot. The rear blind spot has been described as a "killing zone" due to the accidents it contributes to. Backup cameras are usually connected to the vehicle's head unit display. A common variant is a surround-view system, which assembles a synthetic but positionally accurate top-down view of the vehicle and its surroundings.
An onboard camera or in-car camera is a camera placed upon a moving object, such as a vehicle.
Ambarella, Inc. is an American fabless semiconductor design company, focusing on low-power, high-definition (HD) and Ultra HD video compression, image processing, and computer vision processors. Ambarella's products are used in a wide variety of human and computer vision applications, including video security, advanced driver assistance systems (ADAS), electronic mirror, drive recorder, driver and in-cabin monitoring, autonomous driving, and robotics applications. Ambarella's system on chips (SoCs) are designed to deliver a combination of video compression, image processing, and computer vision performance with low-power operation to enable cameras to extract data from high-resolution video streams.
Ring LLC is a manufacturer of home security and smart home devices owned by Amazon. It manufactures a titular line of smart doorbells, home security cameras, and alarm systems. It also operates Neighbors, a social network that allows users to discuss local safety and security issues, and share footage captured with Ring products. Via Neighbors, Ring may also provide footage and data to law enforcement agencies to assist in investigations.
The Sony Xperia Z2 Tablet is a touchscreen Android tablet manufactured and designed by Sony. Like its predecessor, the Xperia Z2 tablet features a 10.1 inch screen and is water and dustproof with a rating of IP55 and IP58. The tablet is the lightest and thinnest 10.1-inch tablet, weighing at 1 pound and is 0.25 inches (6.4 mm) thick, the Z2 Tablet features the Snapdragon 801 processor, Sony's Triluminos display and HDR video recording. Unveiled alongside the Sony Xperia Z2 during the 2014 Mobile World Congress in Barcelona, Spain, on February 24, it was first released on March 26, 2014 in the United Kingdom. On July 3, 2014, Sony launched its Xperia Z2 Tablet in India. On July 27, 2014 Sony released the Z2 Tablet in the US on Verizon.
The accident data recorder is an independent electronic device that records before, during, and after a traffic accident relevant data and thus resembles a flight recorder.
Nextbase is a British consumer technology company and the manufacturer of dash cams.
An action camera or action cam is a digital camera designed for recording action while being immersed in it. Action cameras are therefore typically compact, rugged, and waterproof at the surface level. They typically use CMOS image sensors, and can take photos in burst mode and time-lapse mode as well as record high-definition video. Slow-motion video recording at 120 or 240 fps is also a common feature.
Pro-Vision is an American manufacturer of specialty cameras headquartered in Byron Center, Michigan. The company manufactures and sells a variety of cameras including dashcams, body cameras, and backup cameras. The company has appeared on the Inc. 5000 list of the fastest growing American companies from 2011 to 2017. As of December 2016, Pro-Vision products have been used by organizations in over 50 countries.
On July 11, 2016, Randy Lozoya and John Tennis, two Sacramento police officers, attempted to run over, and later shot and killed Joseph Mann, a 51-year-old mentally ill and homeless African-American man armed with a knife.
Car apps are a genre of software that offer a car and its driver abilities above what is built-in to the vehicle. Examples of Third-party software for cars include allowing data input while moving, traffic jam assistance, diagnostics and lane-keeping.
Flock Safety is an American manufacturer and operator of automated license plate recognition (ALPR), video surveillance, and gunfire locator systems. Founded in 2017, Flock operates such systems under contract with law enforcement agencies, neighborhood associations, and private businesses, and as of 2024, claims to operate in over 4,000 cities across 42 U.S. states.
Nexar is a provider of the world's first open vehicle-to-vehicle (V2V) network for preventing road collisions and enabling autonomous mobility.
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