Method and device for image-based visibility range estimation

摘要

A method for image-based visibility range estimation for a vehicle includes: ascertaining a depiction of an object of the surroundings in an image of an image detection device of the vehicle, the object having an extension in the direction of travel of the vehicle, the image showing a depiction of surroundings ahead of the vehicle; segmenting the depiction of the object in order to obtain first and second object ranges of the object having respective first and second distances to the image detection device within respective tolerance ranges; determining a first object luminance of the first object range and a second object luminance of the second object range; and determining an atmospheric extinction coefficient correlated to the visibility range, using the first and second object luminances, and the first and second distances.

主权项

1. A method for an image-based visibility range estimation, comprising:
obtaining, by processing circuitry, an image captured by an image detection device and that depicts surroundings of the image detection device; processing, by the processing circuitry, the image, wherein the processing includes: ascertaining, by processing circuitry, a depiction of an object in the image; and segmenting, by the processing circuitry, the depiction of the object in order to (i) obtain a first object range of the object having an equal first distance to the image detection device within a tolerance range, (ii) obtain a second object range of the object having an equal second distance to the image detection device within a tolerance range, (iii) determine a first object luminance for the first object range, and (iv) determine a second object luminance for the second object range; and determining, by the processing circuitry, an atmospheric extinction coefficient using (a) the first object luminance, the second object luminance, the first distance, and the second distance with (b) at least one of (i) a one-dimensional equation and (ii) a model for light transmission by atmospheric aerosols, wherein the atmospheric extinction coefficient is in direct correlation to the visibility range.