Patent ID: 11948267
Assignee: AIRBUS SAS
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A method for locating a craft comprising:
acquire a preliminary version of a digital image of a terrain
transform the preliminary version of the digital image into an intermediate version of the digital image by projecting the preliminary version onto a plane corresponding to a plane of a digital map of the terrain, wherein the digital map is stored in the craft,
augment and/or invert a contrast of the intermediate version of the digital image to obtain a final version of the digital image, wherein the contrast of the final version is increased as compared to a contrast of the intermediate version of the digital image,
retrieve from a database stored on the craft a first format of a digital map;
augment a contrast of the first format of the digital map to obtain a final version of the digital map, wherein the contrast of the final version of the digital map is increased as compared to a contrast of the first format of the digital map,
compare the final version of the digital image of the terrain to the final version of the digital map to determine a similarity between the final version of the digital image to the final version of the digital map, and
determine a position of the craft in the terrain based on the similarity.