路面破損圖像系統（SIS）
路面破損圖像系統（SIS）是高解析度路面圖像拍攝系統，用於檢測和分析路面破損。利用線掃描技術，SIS可在正常交通速度行駛時採集公路路面圖像。
While recording, the pavement is illuminated with a highly efficient flashing diode lamp configuration overcoming any shadows caused by sunlight. The system can be operated as a standalone system or synchronised with other equipment.
連續的無失真圖像
To obtain sharp images an array of high-power flashing LEDs is used. For every 1mm the vehicle moves (depending on the resolution), the LED light makes a flash with a strength many times stronger than the sunlight, which removes shadows cast due to the sun.
The camera is triggered simultaneously and each line from the camera is added to the previous lines to make up one long continuous image. This eliminates the overlap algorithms that combine standard single frames.
連續的圖像存儲在電腦內，用時間和距離標記，從而定位圖像每一部分的精確位置。
特點
- Continuous undistorted image of the road surface, exported to user defined image sizes.
- Based on best image sensors on the market.
- Homogeneous illumination with less than ±5 DN variation over entire image width, i.e. no lines/areas with brighter or darker illumination.
- Independent of sunlight, i.e. no shadow casts, from e.g. road signs or bridges.
- Includes Greenwood Engineering’s own LED-based lamps for strong image illumination, several times stronger than sunlight.
- Typical configuration: 4-meter-wide image with a resolution of 1mm pixel size.
- Driving speed as high as undisturbed traffic.