Thermal Compensation for Structured Light 3D Depth Accuracy

The patent applies preliminary action by pre-storing multiple sets of intrinsic parameters (K0, K1, K2, K3, K4) and distortion coefficients (k1, k2, k3, k4) corresponding to different temperature points. When operation occurs, the system directly retrieves and applies the appropriate parameter set based on detected temperature, avoiding complex real-time calculations while maintaining high measurement precision across varying thermal conditions

The patent implements parameter changes by dynamically adjusting camera intrinsic parameters and lens distortion coefficients based on temperature variations. The system stores multiple parameter sets calibrated at different temperatures and selects the appropriate set according to the detected temperature, thereby compensating for thermal effects on image quality and depth map accuracy without requiring complex real-time optimization algorithms

The patent eliminates real-time computational overhead by performing all parameter calibration work in advance. Multiple sets of intrinsic parameters and distortion coefficients are pre-calculated and stored in memory for different temperature points. During operation, the system only needs to detect temperature and retrieve the corresponding pre-stored parameters, reducing processing time from complex real-time optimization to simple table lookup and application

The patent uses copying by creating and storing multiple copies of parameter sets (K0, K1, K2, K3, K4 and k1, k2, k3, k4) corresponding to different temperature conditions. Instead of calculating corrections in real-time, the system copies the appropriate pre-calculated parameter set from storage based on the detected temperature and applies it directly to compensate for thermal effects, significantly reducing processing time

The patent applies segmentation by separating the thermal compensation function into distinct modular components: temperature sensing circuits integrated with the camera and projector, parameter storage modules containing pre-calibrated data, and processing logic for retrieving and applying appropriate parameters. This modular segmentation allows each component to be independently optimized and maintained while achieving reliable thermal compensation capability

The patent implements self-service by integrating temperature sensing circuits directly into the camera and projector units, allowing each device to autonomously detect its own temperature and retrieve corresponding compensation parameters. The system automatically performs thermal compensation without requiring external intervention or complex control systems, thereby achieving reliable thermal adaptation with minimal additional complexity