OCT and Visualization Module Calibration via Cascaded Image Registration

The system performs preliminary actions by automatically generating a scanning pattern for a calibration region and acquiring OCT data before the actual calibration is needed. The cascaded image registration process is pre-configured with coarse and fine registration stages, so when calibration is required, the system can quickly execute the pre-planned registration steps without requiring manual intervention or waiting for technical staff availability.

The system performs self-service calibration through automated image registration. The controller automatically generates scanning patterns, acquires OCT data, performs coarse registration to correct large misalignments, and executes fine registration to achieve precise alignment. This self-calibration process eliminates the need for experienced technical staff to manually perform calibration, significantly reducing both time requirements and dependency on specialized personnel.

The system replaces complex mechanical alignment procedures with computational image registration methods. Instead of relying on mechanical adjustments to align OCT and visualization images, the controller performs coarse registration using translation transformation matrices and fine registration using affine diffusion tensor image registration. This substitution of mechanical alignment with software-based registration simplifies the overall system complexity while maintaining the mechanical scanning capability for imaging.

The system introduces an intermediary computational process between the mechanical scanning system and the final aligned images. The cascaded image registration process acts as an intermediary that takes raw OCT data and visualization data, processes them through coarse and fine registration stages, and produces aligned output. This intermediary registration process decouples the mechanical scanning complexity from the alignment task, allowing each to be optimized independently.

The system achieves full automation through self-service calibration. The controller automatically generates scanning patterns, acquires OCT data synchronously with visualization data, performs coarse registration to correct large misalignments, and executes fine registration to achieve precise alignment. The entire calibration process occurs without human intervention, making the system easy to operate while maintaining high automation. Users simply need to initiate the calibration process, and the system handles all subsequent steps automatically.

The system maintains continuous useful action throughout the calibration process. The cascaded image registration process continuously processes images through coarse registration and then fine registration without interruption. The robotic arm continuously moves the head unit to capture calibration data across the entire field of view. This continuous automated processing eliminates the need for manual intervention at various stages, making the calibration process both highly automated and operationally simple.