Driver Monitoring Camera Optics for ROI Pixel Density

The patent applies local quality by creating non-uniform pixel density distribution across the field of view. Regions of interest (such as driver's face, hands, or specific road areas) are assigned higher pixel density while less important areas have lower density. This is achieved through optical lens design that intentionally introduces distortion to concentrate pixels in specific zones, thereby improving detection accuracy in critical regions without requiring uniform high resolution across the entire image.

The patent converts the harmful effect of optical distortion into a beneficial feature. Instead of using distortion-free lenses that provide uniform but insufficient pixel density, the system intentionally employs distorted lenses that concentrate pixels in regions of interest. The distortion is not corrected but rather utilized to achieve higher effective resolution in critical areas, transforming what is traditionally considered a defect into an advantageous property for detection accuracy.

The patent changes the spatial distribution parameter of pixel density from uniform to non-uniform. By modifying the optical parameters of the lens system to introduce controlled distortion, the system achieves variable pixel density across different field of view zones. This parameter change allows critical regions to have higher effective resolution without requiring multiple cameras or complex post-processing, thus improving detection accuracy while maintaining relatively simple system architecture.