CPC G06F 18/22 (2023.01) [G06T 7/70 (2017.01); G06T 7/85 (2017.01); G06V 20/10 (2022.01); G06T 2207/10012 (2013.01); G06T 2207/30252 (2013.01)] | 14 Claims |
1. A distance recognition system for use in a marine vessel, the distance recognition system comprising:
at least one memory;
a first imaging unit positioned on a hull so that an imaging area of the first imaging unit includes a water surface;
a second imaging unit positioned on the hull at a location higher than a location of the first imaging unit and so that an imaging area of the second imaging unit includes the water surface; and
at least one processor coupled to the at least one memory and configured or programmed to:
acquire a first image captured by either one of the first imaging unit or the second imaging unit, and a second image captured by the other one of the first imaging unit or the second imaging unit;
perform a matching process between the first image and the second image to acquire distance information about any position in the first image;
determine an existence of waves based on the acquired distance information;
recognize a water surface condition based on heights of a plurality of the waves that have been determined to exist;
measure a height of a water surface at a predetermined distance from a hull of the marine vessel based on the acquired distance information; and
output a notification indicating a change of the water surface height when the height of the water surface changes exceeding a threshold value for a predetermined period of time.
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