Modified Bayer Pattern Filter Array for Zigzag Edge Reduction

The patent applies asymmetry by modifying the conventional symmetric Bayer pattern into an asymmetric modified Bayer pattern. Specifically, the filter array uses alternating columns where odd columns have a first color pattern (e.g., RGGB) and even columns have a second color pattern (e.g., GBGR), breaking the symmetry of the traditional Bayer pattern. This asymmetric arrangement allows for different exposure times in alternating columns, enabling smooth HDR combination and binning operations that eliminate zigzag edges while maintaining image sharpness and resolution.

The patent applies preliminary action by pre-configuring the sensor with a modified Bayer pattern that anticipates and prevents zigzag edge formation before image processing occurs. Instead of correcting zigzag edges after capture through re-interpolation, the asymmetric filter arrangement is designed in advance to enable natural smooth transitions during binning and HDR combination. This preliminary structural configuration eliminates the need for post-processing re-interpolation algorithms that would otherwise compromise image sharpness and resolution.

The patent applies the extraction principle by removing the need for complex re-interpolation algorithms and associated memory resources. The modified Bayer pattern is designed to produce images that are naturally suitable for direct binning and HDR combination without requiring additional interpolation processing. This extracts or eliminates the harmful zigzag artifacts at the sensor level through the asymmetric filter configuration, rather than requiring expensive post-processing memory and computational resources to correct them.