Vehicle Camera Calibration Verification Using Height-Based Overlays

The verification target is divided into multiple segments at different heights, each with markers positioned at specific heights. This segmentation allows the system to verify calibration accuracy at multiple vertical levels simultaneously, addressing the reliability issue by checking whether markers at each height level fall within their respective required accuracy ranges, rather than relying on a single verification point that may be affected by positional shifts.

The patent introduces a vertical height dimension to the calibration verification process. By positioning markers at different heights on verification targets and calculating corresponding required accuracy ranges at each height level, the system transforms a two-dimensional verification into a three-dimensional verification. This dimensional expansion ensures that calibration accuracy is verified throughout the entire vertical field of view, preventing erroneous recognition due to positional shifts at any height.

The system creates overlay images that are graphical representations or copies of the required accuracy ranges. Instead of directly measuring and comparing physical positions, the patent generates visual overlay images showing the acceptable ranges at each height level. Operators can then visually verify whether markers fall within these displayed ranges, simplifying the verification process while maintaining high measurement precision across multiple height levels.

The overlay image acts as an intermediary between the complex calculation of required accuracy ranges and the operator's visual verification. The system calculates the precise required accuracy ranges at each height level, then represents them visually through overlay images. This intermediary representation simplifies the interface between the complex computational system and the human operator, making it easier to verify calibration accuracy without directly dealing with the computational complexity.