1. A fusion method for combining sensor data with synthetic data to form an integrated image, comprising in combination: identifying at least two landmarks; extracting an image gradient from a sensor image dataset for only each of the at least two landmarks; extracting a corresponding image gradient from a synthetic image dataset for only each of the at least two landmarks, the synthetic image dataset representative of a three-dimensional synthetic image; calculating a center of mass for each of the image gradients extracted from the sensor and synthetic image datasets; calculating displacement between corresponding image gradients from the sensor and synthetic image datasets centered at the calculated centers of mass; and stabilizing images by minimizing the displacement to form the integrated image.