A vison-based landing system comprises a processor onboard an aerial vehicle, an onboard vision sensor, onboard aiding sensors, and a data storage unit. The processor hosts an adaptive feature extraction module operative to perform a method that comprises capturing an image of a landing area having a plurality of edge features; calculating an estimated slope of an expected edge feature; calculating an expected gradient direction of the expected edge feature; selecting a horizontal basis kernel for the expected edge feature along an expected horizontal gradient; selecting a vertical basis kernel for the expected edge feature along an expected vertical gradient; calculating a combined convolution kernel for the expected edge feature based on the horizontal and vertical basis kernels, the estimated slope, and the expected gradient direction; and performing a convolution operation on the image using the combined convolution kernel to obtain an edge feature image of the landing area.
ADAPTIVE FEATURE EXTRACTION TO DETECT LETTERS AND EDGES ON VEHICLE LANDING SURFACES
2023-09-07
Patent
Electronic Resource
English
ADAPTIVE FEATURE EXTRACTION TO DETECT LETTERS AND EDGES ON VEHICLE LANDING SURFACES
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