Line Scan Ophthalmoscope Image Stabilization via Closed-Loop Tracking

The patent segments the image processing into two parts: a line scan camera captures individual scan lines for real-time motion calculation, while a separate frame-based system provides comprehensive fundus imaging. This segmentation allows motion tracking to occur at the line level without waiting for complete frame acquisition, thereby reducing time delay while maintaining measurement precision.

The system performs preliminary motion calculation on individual scan lines before the complete frame is acquired. By calculating fundus target motion amount on partial data (single scan line) in advance, the system eliminates the time delay associated with waiting for complete frame processing, while still achieving accurate tracking through the integrated frame-based verification.

The patent merges optical closed-loop control with digital processing by integrating a line scan camera into the existing frame-based LSO system. The line scan camera provides real-time optical feedback for motion tracking, while the frame-based system maintains comprehensive imaging capabilities. This combination achieves reliable fundus motion signal calculation without requiring a complete redesign of the digital control architecture.

The line scan camera acts as an intermediary between the optical system and the digital processing system. It captures real-time scan line data that reflects actual fundus position, providing a reliable optical feedback signal that mediates between the physical optical system and the digital control algorithms, thereby improving signal reliability without excessive complexity.

The patent segments the image acquisition and processing into line-by-line scan line capture by the line scan camera, rather than waiting for complete frame acquisition. This segmentation enables real-time motion tracking at the line level, allowing the control loop to respond to rapid eye movements within the frame acquisition period while the frame-based system continues to provide comprehensive imaging.

The line scan camera enables continuous motion tracking throughout the entire frame acquisition process, rather than providing a single post-acquisition measurement. This continuous action allows the system to track and correct for eye movements occurring during the scan, maintaining response speed throughout the duration of frame acquisition rather than only after completion.