GB/T 41784-2022 in English
VALIDInformation technology—Real-time positioning—Visual positioning system data interface
- Issued on:2022-10-12
- Implemented on:2023-05-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
《GB/T 41784-2022信息技术 实时定位 视觉定位系统数据接口》由TC28（全国信息技术标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Analysis of standard technical framework
GB/T 41784-2022 builds a complete real-time visual positioning system interaction protocol layer. The main specifications include:
| Interface type | Functional module | Interaction frequency |
|---|---|---|
| GetMetaData | Service metadata acquisition | Single session |
| InitPosition | Positioning initialization | Single session |
| RequestPosition | Sensor data transmission | ≥1Hz |
Core parameter system
Coordinate reference system specification
- OCS outdoor coordinate system: Comply with GB/T 30288-2013 satellite positioning specification
- ICS indoor coordinate system: Coordinate system parameter accuracy reaches millimeter level, including origin deflection angle correction factor
| Parameter category | Linear accuracy | Angular accuracy |
|---|---|---|
| Horizontal positioning | ±0.5m | 1° |
| Vertical positioning | ±0.8m | - |
Implementation compliance points
Positioning abnormality comparison table:System design requires preset 10 types of standard error codes, among which the high-frequency problems include:
- 1006-Out of the locatable area
- 1007-Insufficient image feature points
Practical examples refer to the service metadata XML message format in Appendix B, for It is recommended to use the SIFT/BRIEF hybrid feature description scheme for the>FeaturePoint2D field.
Technology Evolution Direction
Compared with the GB/T 35629-2017 multi-mode positioning standard, the new version has achieved three major upgrades:
- Integration of 4 new spatial coordinate systems (added WGS-84_B system)
- Optimization of visual data encryption and compression algorithm (JPEG2000 quasi-lossless transmission)
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