CPC G01S 17/32 (2013.01) [G01S 7/484 (2013.01); G01S 17/04 (2020.01); G01S 17/89 (2013.01)] | 18 Claims |
1. A method of increasing a dynamic range of a light detection and ranging (LiDAR) device, comprising:
acquiring a first image frame captured at a high illumination, the first image frame including an image of a high-reflectivity object and a low-reflectivity object, the image of the high-reflectivity object being saturated;
acquiring a second image frame captured at a reduced illumination, the second image frame including an image of the high-reflectivity object, with the low-reflectivity object being invisible;
identifying a saturation region on the first image frame;
performing a cross-correlation operation between the identified saturation region and a corresponding region on the second image frame to identify a region in the saturation region;
replacing the identified region in the saturation region with a corresponding region in the second image frame;
performing one or more cross-correlation operations to update the remainder of the saturation region with a corresponding region of the second image frame; and
after each cross-correlation, performing a gradient step with respect to intensity data and range data related to the remainder of the saturation region to denoise the updated remainder of the saturation region.
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