The vehicle underbody scanning system is a very important solution in the field of security inspection and protection, and plays a significant role in many occasions. At present, the vehicle underbody scanning system mainly consists of two technical camps: wired array scanning technology and the rapidly developing area array scanning technology in recent years. The core component of the linear array scanning system adopts a linear array scanning camera, which has a linear shape and each scanning width is only one or a few pixels. However, line array cameras also have some disadvantages and limitations in use. Because of pixels......
The vehicle underbody scanning system is a very important solution in the field of security inspection and protection, and plays a significant role in many occasions. At present, the vehicle underbody scanning system mainly consists of two technical camps: wired array scanning technology and the rapidly developing area array scanning technology in recent years.
The core component of the linear array scanning system adopts a linear array scanning camera, which has a linear shape and each scanning width is only one or a few pixels.
However, line array cameras also have some disadvantages and limitations in use. Because there is too little pixel information, it is impossible to make a re-judgment. So when this technology is applied to the vehicle underbody scanning system, if the vehicle travels at an uneven speed or stops halfway, the image will be severely stretched or shortened, resulting in severe distortion.
Another drawback is that the line array camera does not have itAuto ExposureIt has an automatic exposure function, so the exposure parameters of the camera need to be set according to the distance from the target object. If the distance of the target object changes, the exposure Settings need to be modified again, so it is only applicable to scenarios with a fixed distance. Otherwise, when the exposure at close range is normal, the exposure at long range is insufficient, or when the exposure at long range is normal, the exposure at close range is excessive. In the application scenarios of vehicle underbody scanning systems, the chassis heights of each vehicle are not the same, so the line array system cannot well meet the scanning requirements of different models.
Area array scanning refers to scanning a complete image each time, and the data volume of each scan is large, especiallyHigh-definition area array scanningThe amount of pixel information in each scan is extremely large, and the performance requirements for the image processor are very high. However, due to the large amount of information, area array scanning can provide more image processing information. In the application of the vehicle underbody scanning system, the images collected each time by the area array scanning are very large. There will be overlapping parts between the previous scan and the subsequent scan. The image processor can calculate the target's moving speed based on the number of pixels moved. Therefore, for the scanning of non-uniform vehicles, it is also possible to stitch together high-definition images without any abnormalities.
With the rapid development of science and technology, the performance of processors is becoming increasingly powerful. Area array scanning technology, which can provide more information, will replace line array scanning systems in an increasing number of fields. Just as in many fields, line array barcodes have been replaced by area array QR codes because area array QR codes can provide more useful information. Of course, line array scanning technology may have some low-end application scenarios for a long time, such as barcode scanners for goods. In increasingly intelligent applications, area array technology will become mainstream.
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