Patent Document ID: 8971579
Application ID: 13859047
Patent Status: 1

Claim One:
1. A system configured to perform feature-based image analysis for localization of a windshield within an image comprising: an image capture device operably connected to a data processing device and a target trigger device, wherein said image capture device captures an image upon receiving notification from said target trigger device; and a processor-usable medium embodying computer code, said processor-usable medium being coupled to said data processing device, said computer program code comprising instructions executable by said processor and configured for: identifying at least one object of interest on a target vehicle within said image that is not a windshield; locating said at least one object of interest within said image; and identifying a windshield of said target vehicle within said image based on a location of said at least one object of interest and a relative geometric relationship between said identified at least one object of interest and said windshield by conversion of physical dimensions to pixel dimensions within said image utilizing one of: l ′ ≈ ( a ⁢ ⁢ cos ⁢ ⁢ θ + b ⁢ ⁢ sin ⁢ ⁢ θ ) ⁢ ⁢ c ′ c , ⁢ and l ′ ≈ fH ( ⁢ a ⁢ ⁢ cos 2 ⁢ θ + b ⁢ ⁢ sin ⁢ ⁢ θ ⁢ ⁢ cos ⁢ ⁢ θ ) sd , where l′ represents a vertical distance in image pixels between the headlights and the windshield in said captured image c′ represents the distance in image pixels between two headlights in said captured image, a represents a real-world distance from a headlight to the forward most edge of a hood of said vehicle, b represents a real-world distance from the forward most edge of the hood to the bottom of the windshield, c represents a real-world distance between the two headlights, f represents the focal length of the image capture device, H represents a horizontal number of pixels of the image capture device, s represents the horizontal physical dimension of the image capture sensor, θ represents the elevation look down angle from the camera to the hood of the vehicle, and d represents the real-world horizontal distance from the location of the image capture device to the front of the target vehicle.