Radar-Based Top View Image Generation for Vehicle Surroundings

The patent replaces complex optical-mechanical camera projection systems with a radar-based detection system. Instead of using multiple camera sensors and complex projective geometry algorithms to generate top views, the system uses radar sensors to directly obtain distance and position data of surrounding objects, which is then processed into a simplified top view representation. This substitution eliminates the need for expensive camera arrays and complex image projection computations while maintaining the essential function of providing a top-down environmental overview.

The patent changes the representation parameters from simple radial distance rings to a top view coordinate system that maps object positions onto a 2D plane resembling a bird's-eye view. This transformation uses the radar-derived distance and angle data to plot objects at their correct relative positions in a top-down layout, making the display more intuitive and visually appealing while keeping the underlying radar sensor technology simple and cost-effective.

The patent avoids the flat-world projection assumption by replacing camera-based image projection with radar-based point cloud generation. Radar sensors directly provide accurate distance measurements to objects regardless of their height or position in 3D space. The processing unit uses these direct distance measurements to plot objects at their true relative positions in the top view, eliminating the need for complex 3D-to-2D projection transformations that cause distortion artifacts when objects are above the ground plane.