DEFINITION
Four-channel fisheye surround-view system with ECU integration: 2D/3D bird's-eye stitching, dynamic guidelines and one-shot calibration for OEM and fleet projects.
Specifications
Typical configuration for reference; final specs confirmed per project.
| Parameter | Specification |
|---|---|
| Camera configuration | 4× ultra-wide fisheye cameras (front grille / side mirrors / tail) |
| Sensor specification | 1/4"–1/3" CMOS, 720P/1080P, FOV ≥ 190° |
| Processor platform | NXP S32V234 / Fullhan FH8333 / TI TDA4 optional |
| Stitching frame rate | 25/30fps real-time |
| View modes | 2D bird's-eye / 3D surround / single-channel zoom / 2D+3D dual mode |
| Guidelines | Dynamic trajectory lines swing in real time with steering angle |
| Calibration | One-shot calibration with active cloth (about 3–5 minutes) |
| Video output | CVBS / LVDS / digital interface (per head-unit platform) |
| Extension | Expandable with a 5th streaming rearview channel for 540° vision |
| Operating temperature | -40℃ ~ +85℃ |
How It Works
A single fisheye camera's field of view exceeds 180°, but the image carries heavy barrel distortion and cannot be used directly. The core AVM pipeline: distortion correction (restoring the curved image per the fisheye optical model) → view transform (projecting corrected images onto a roof-centered bird's-eye coordinate system using extrinsics from calibration) → stitching & blending (luminance balancing and seam blending in overlapping zones) → overlay display (3D vehicle model, dynamic guidelines, obstacle alerts).
Synchronized exposure and white balance across the four cameras is key to image consistency — a unified AE strategy prevents brightness mismatch among the four directions. Calibration determines stitching accuracy: TSIMSAFE provides an active calibration-cloth solution where one-shot calibration takes just 3–5 minutes, and calibration data feeds a vehicle-specific database covering 200+ models across Toyota, Volkswagen, Honda and other mainstream brands.
Applications
- OEM / aftermarket passenger-car upgrades: all-around visibility during low-speed maneuvering, narrow meetings and roadside starts
- Commercial vehicles & machinery: blind-zone safety and regulatory compliance for trucks, buses, loaders and sanitation vehicles
- Special vehicles: extra-long-body surround view and trajectory guidance for RVs, pickups and towing setups
- Low-speed unmanned equipment: perimeter perception for forklifts, sweeping robots and low-speed campus vehicles
Solution Advantages
- Contributor to the national standard: TSIMSAFE is one of the drafting organizations of China's surround-view national standard; solutions are benchmarked against it
- Proven in volume: vision products installed on over 1 million vehicles, with 100% imaging and stitching tests before shipment
- Full-stack in-house: fisheye modules (AA line) + calibration + stitching algorithms + head-unit protocol adaptation delivered as one package
- 540° extended view: a streaming rearview channel eliminates C-pillar and rear-headrest obstruction
