How to learn from each other: why is radar video fusion so important?
Release time:
2023-12-12
In the actual environment, light changes, target motion complexity, occlusion, similar colors of target and background, messy background, and harsh environment will cause a large number of false positives and false negatives in video analysis. How to reduce false positives and false negatives is the biggest challenge. Clear images, the use of computers can be unclear image denoising, sharpening and other processing, by adjusting the image size, with the high resolution of the display, you can see a clear high-quality image, long-term storage, real-time call.
In the actual environment, light changes, target motion complexity, occlusion, similar colors of target and background, messy background, and harsh environment will cause a large number of false positives and false negatives in video analysis. How to reduce false positives and false negatives is the biggest challenge. Clear images, the use of computers can be unclear image denoising, sharpening and other processing, by adjusting the image size, with the high resolution of the display, you can see a clear high-quality image, long-term storage, real-time call.
Millimeter-wave radar: the advantages of harsh environment is extremely applicable, the disadvantages can not see a clear image
Because the wavelength of millimeter wave is between centimeter wave and light wave, millimeter wave has the advantages of microwave guidance and photoelectric guidance. Millimeter wave radar can accurately detect the moving direction, distance, speed and angle of moving target. Compared with infrared, laser, video and other optical seeker, millimeter wave seeker has strong ability to penetrate fog, smoke and dust, and has the characteristics of all-weather and all-weather.
Give full play to their respective strengths, integration is the general trend
Radar vision fusion intelligent warning products, radar in the target into the defense zone to detect early warning, at the same time through the distance, angle and speed of the target to determine the exact location of the target, fusion video analysis technology for target review, through artificial intelligence (AI) algorithm to determine whether the target needs to be alarm.
The product integrates radar and vision at the signal level, perfectly integrates the active detection, high sensitivity and data judgment and visibility of video intelligent analysis of radar technology, greatly improving the detection and recognition rate of the system. Physical integration, the use of integrated design, power sharing, unified installation, can effectively save material costs and installation costs.
Radar is fully integrated with vision. Vision provides clear images. Radar accurately detects the moving direction, distance, speed and angle of moving targets. Millimeter wave radar and vision fusion system make full use of the respective advantages of sensors, give full play to their respective strengths, integrate artificial intelligence technology, make full use of the distance and column coordinates of targets given by radar positioning, and adopt distance-based blob merging and deleting moving targets. 7 × 24h all-weather real-time protection, adapt to rain, snow, fog, haze, dust and other bad weather, to maximize the elimination of omissions, eliminate false positives.
The main function of the fusion machine
■ Defense zone drawing and alarm track setting: free drawing of alarm area, filtering area and early warning area;
■ Alarm record: when an intrusion target is found, the alert system continuously sends out pulse prompt corresponding to the map position of the defense area and records the alarm information;
■ Area overlay: unified overlay of video coverage area and radar coverage area to unify coordinates;
■ Follow up the target for focusing: Through the radar target tracking trajectory, real-time vision is provided, vision can follow up the radar coordinates to adjust the best distance, to achieve clearer and higher quality records.
How to select millimeter wave radar?
A look at the radar algorithm capability: low false alarms, less false alarms The current domestic radar technology has gradually matured, radar has entered a period of rapid development, but there are still various manufacturers of algorithm capabilities are uneven, the specific performance of the tree shaking, grass, shrubs and other shaking to produce a large number of false alarms.
Second, look at the power of radar: the detection distance and coverage angle are appropriate. The most important choice of radar should be based on its own application requirements, such as personnel detection distance, vehicle detection distance, radar coverage angle, etc. At the same time, it should also be combined with the horizontal range of the camera, and it is best to coincide with the camera angle. The regional application recommend choose large angle coverage, the horizontal angle is best at 80 ° ~ 100 °; the perimeter application recommend choose narrow angle, the horizontal angle is best at 10 ° ~ 30 °.
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