Multi-pattern Calibration Rig for Robust Camera Alignment

The patent merges multiple calibration patterns into a single integrated calibration target that can be captured in one image. Instead of requiring multiple separate images of calibration patterns from different views, the invention combines multiple patterns (e.g., checkerboards, ellipses, or other geometric shapes) onto one target structure, allowing the camera to capture all necessary calibration information simultaneously in a single shot, thereby dramatically reducing calibration time while maintaining precision

The calibration target is segmented into multiple distinct patterns or geometric shapes that can be independently detected and processed. Each pattern (checkerboard, ellipse, or other shape) provides specific calibration information, and the system processes these segmented patterns to extract multiple camera parameters from a single image capture, enabling precise calibration without requiring multiple sequential images

The patent employs asymmetric or distinctive geometric patterns (such as ellipses, circles, or non-standard checkerboard configurations) that have unique shape properties making them easily distinguishable from background noise and invariant to illumination changes. These asymmetric patterns provide robust detection features that conventional symmetric corner detection algorithms cannot reliably identify under varying lighting conditions

The calibration patterns utilize high-contrast color or intensity variations (such as black-and-white checkerboards, colored ellipses, or patterns with distinct luminance differences) that create strong visual signals easily detectable by image processing algorithms. These color-based patterns remain recognizable despite illumination variations, as the relative contrast between pattern elements maintains detection accuracy