BrightWay Vision (BWV) is the leader in advanced gated-imaging sensors. BWV active gated technology operates like an optical radar for detection and ranging of obstacles, pedestrians, and traffic signs. It collects both images and range point clouds to be used for Advanced Driver Assistance Systems (ADAS) and Highly Automated Driving (HAD).
Active gated-imaging is a Time-Of-Flight (TOF) imaging technology, consisting a gated CMOS image sensor with tightly controlled opening and closing times of the sensor’s pixelated gate array. The gated sensor is used in conjunction with a Near Infrared pulsed-illumination source.
Image quality is enhanced through limiting the exposure time of the camera to the return time of an emitted light pulse from an object at a predefined distance. In other words, the Near Infrared illumination source, is pulsed at preselected intervals synchronized to a gated sensor.
The principle of active gated-imaging is used to enhance image contrast in scenes where the object of interest is obscured by clutter, such as rain, fog, snow and mist or by strong light sources, such as oncoming headlights and sun reflections that are blurring or saturating the sensor.
Exposing the sensor repeatedly in preselected intervals at a high frequency (thousands of times per second), allows the image to be collected from varying distances, known as “Slices”, with uniform intensity and contrast over the entire range. Each of these slices can be separately analyzed, using ADAS logic to identify pedestrians, animals, obstacles, retro-reflective traffic signs, lane marking and more.
Ordinary Vision at Night
24/7 BWV Active Gated Image
Several slices are superimposed in the gated image sensor to create a single high resolution image with an adequate Signal-to-Noise that contains the sliced scene data. This pre-processed data is then transferred to analytical software, to identify obstacles, pedestrians, road signs and other vehicles.
BWV active gated technology is used to generate depth-map information, known as a range map in LIDAR systems, where each pixel in the image is identified in the 3D space, allowing for obstacle distances from the vehicle, to be accurately measured. Depth maps provide complete surface information allowing ADAS and HAD systems to calculate possible free paths.
The system can also detect retro-reflective surfaces, such as traffic signs, lane markings, vehicle rear retro-reflectors, license plates and studs.
By correctly identifying these objects, the system can pass information to analytical software that advises and warns the driver about driving conditions, road works, speed limits and other hazards. The system inherently recognizes retro-reflective elements, and thus requires almost zero processing for road sign detection. Signs can be identified at pre-determined ranges enabling localization / positioning of the vehicle.
Slice 35-50 m
One Technology – Multiple Functions
BWV introduces Enhanced Driver Vision (EDV) and is an enabler for Enhanced Computer Vision (ECV) in inclement weather and poor light conditions which supports robust & simplified ADAS and autonomous computation for all driving conditions.
ADAS, AEB & Autonomous Vehicles
ECV- LDW / LKA
Lane Departure Warning (LDW) is designed to warn the driver when the vehicle begins to steer off its lane, unless a turn signal is on in that direction.
Lane Keeping Assist (LKA), in addition to LDW, automatically take steps to ensure the vehicle stays in its lane. BWV provides a clear image in adverse weather, with tire spray and in shadow conditions to enable a robust lane marking detection.
ECV- FCW / AEB CITY & INTER-URBAN
Forward Collision Warning (FCW) and AEB protocols are designed to prevent rear-end collisions. BWV technology increases the positive detection and reduces false detection of vehicles (e.g. passenger cars, buses, trucks etc.) by providing enhanced vision of the forward facing camera.
Traffic Sign Recognition (TSR) identifies traffic signs such as ‘speed limit’, ‘school zone’ or ‘turn ahead’. The system can also detect overtaking restrictions. Recognition is based on BWV capability to analyze retro-reflective surfaces and by this to reduce computing power.
EDV / ECV – HARSH WEATHER
Using gated-imaging technology the system can operate in all light conditions, during the day or night (beyond vehicle headlamp illumination), and in all weather conditions, such as rain, snow, fog and mist. BWV technology overcomes backscatter due to rain, fog or snow which impacts the ability of standard vision systems to identify objects of importance.
EDV / ECV – NIGHT
BWV provides superb automotive night vision capabilities to circumvent challenges of existing camera technologies, such as oncoming car headlights, unlit and almost invisible objects, and quickly changing light conditions. BWV image increases a driver’s perception and seeing distance in darkness, beyond the reach of the vehicle’s headlights. BWV image is immune to glare from similar systems, from oncoming headlights and from street lights.
ECV – OBJECT DETECTION / AEB PEDESTRAINS
Pedestrian and animal accidents are the one of the highest cause of traffic injuries and fatalities. Pedestrian detection, has become an integral part of ADAS functionality and AEB protocols. In order to avoid collisions with pedestrians and other types of objects, they must be detected. BWV sensors, using the slicing and ranging capabilities detects any object in vehicle path. This ability is enabled in day, night (e.g. to be used in conjunction with object spot highlighting function) and adverse weather conditions.
ECV – IHC
IHC (Intelligent Headlight Control) continuously tailors the headlamp range so the beam just reaches other vehicles ahead, ensuring maximum possible seeing range without blinding other road users. BWV, with its immunity to oncoming vehicle glare, can clearly identify oncoming cars and their distance, to ensure a proper IHC implementation.
ECV – FREE PATH
Much like LIDAR, but using BWV active gated-imaging, the system can accurately collect a dense point cloud (range map information) and measure the distance between the vehicle and a possible obstacle in the distance. BWV ranging capability can then be used for free path and any other range based application such as object detection, FCW etc.
PATENTS AND TECHNICAL PAPERS
BrightWay Vision has registered several patents and has submitted documentation for additional patent pending applications, in the field of vision systems, ranging systems, active gated vision systems, and general automotive ADAS & HAD technologies. More information about our patents and white papers can be found in the media relations tab of this web site.