Autofocus Mode Switching via Image Clipping and Subject Analysis

The patent introduces an image clipping unit that extracts a predetermined area from the displayed image as an intermediary between the touch panel input and the autofocus system. This clipping unit processes the touch coordinates to identify a specific region of interest, which then serves as the basis for autofocus target determination. This intermediary processing step enables efficient subject tracking while maintaining touch panel operation convenience.

The patent implements dynamic autofocus mode determination that automatically switches between touch fixing focus mode and touch tracking focus mode based on the characteristics of the identified subject. The system analyzes the clipped image area to determine subject type and dynamically selects the appropriate autofocus mode, enabling both high focus accuracy for static subjects and adaptability for moving subjects through automatic mode transitions.

The system dynamically determines when to switch between touch tracking and touch fixing modes based on subject movement detection. When the subject remains stationary or moves minimally within the clipped area, the system employs touch fixing focus mode to maintain high focus accuracy. When subject movement is detected, it transitions to touch tracking focus mode to maintain adaptability, thus optimizing the balance between accuracy and tracking capability.

The patent implements an automatic autofocus mode determination function that analyzes the clipped image area and autonomously selects the appropriate autofocus mode without requiring manual user input. The system self-services by detecting subject characteristics and movement patterns, then automatically configuring the optimal autofocus settings, thereby maintaining control precision while dramatically improving ease of operation through elimination of manual mode switching.