Vision: false positives and false negatives are the biggest challenges faced by vision in harsh environment
• in the actual environment, there will be a large number of false positives and missed positives in video analysis due to illumination change, target motion complexity, occlusion, similar color between target and background, chaotic background and harsh environment. How to reduce false positives is the biggest challenge.
• clear image: the computer can denoise and sharpen the unclear image. By adjusting the image size and with the help of the high resolution of the display, you can view the clear and high-quality image for long-term storage and real-time call.
Millimeter wave radar: its advantages are extremely applicable in harsh environment, but its disadvantages are that you can’t see a clear image
• millimeter wave: electromagnetic wave with wavelength of 1 ~ 10mm (30 ~ 300g) is called millimeter wave.
• 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 targets
• compared with infrared, laser, video and other optical seeker, millimeter waveguide 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 and integration is the general trend
- Radar vision fusion intelligent warning product: when the target enters the defense area, the radar carries out detection and early warning, judges the accurate position of the target by judging the distance, angle and speed of the target, reviews the target by integrating video analysis technology, and judges whether it is the target to be alarmed by artificial intelligence (AI) algorithm.
- 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, and greatly improves the detection and recognition rate of the system.
- Physical integration, integrated design, power sharing and unified installation can effectively save material cost and installation cost.
- Radar is fully integrated with vision and provides clear images. Radar accurately detects the moving direction, distance, speed and angle of moving targets,
- Radar vision makes use of their respective advantages: millimeter wave radar and vision fusion system are used to make full use of their respective advantages and give full play to their respective strengths
- Integrate artificial intelligence technology: make full use of the range and target column coordinates given by radar positioning, and merge and delete the moving target blob based on distance.
- All weather: 7 × 24h all-weather real-time protection, adapt to rain, snow, fog, haze, sand dust and other bad weather, and eliminate missing reports and false reports to the greatest extent
Main functions of ray vision fusion machine
- Defense area drawing and alarm track setting: draw alarm area, filter area and early warning area freely;
- When the intrusion target is found, the warning system continuously sends pulse prompt corresponding to the location of the defense area map, and records the alarm information;
- Area superposition: the area covered by video and radar shall be uniformly superimposed and the coordinates shall be unified;
- Follow up the target for focusing: provide vision in real time through the radar target tracking track. Vision can follow up the radar coordinates to adjust the optimal distance, so as to achieve clearer and higher quality records.
How to select millimeter wave radar?
Radar algorithm capability: low false alarm and less false alarm
At present, the domestic radar technology has gradually matured, and the radar has entered a period of rapid development, but there are still uneven algorithm capabilities of various manufacturers. Specifically, the shaking of trees, grass and shrubs produces a large number of false positives. Nalei security radar has achieved an average false alarm of less than 1 time / day through AI technology.
Look at the power of Radar: the most important thing is the appropriate detection range and coverage angle
The radar shall be selected according to its own application requirements, such as personnel detection distance, vehicle detection distance, radar coverage angle, etc. at the same time, it shall also be combined with the horizontal range of the camera, and it is best to coincide with the camera angle. Large angle coverage is recommended for regional application, and the best horizontal angle is 80 ° ~ 100 °; Narrow angle is recommended for perimeter application, and the best horizontal angle is 10 ° ~ 30 °.
Recommendation for radar type selection of Nalei technology mine vision integrated machine: