Gated2Depth: Real-Time Dense Lidar From Gated Images

Tobias Gruber, Frank Julca-Aguilar, Mario Bijelic, Felix Heide; The IEEE International Conference on Computer Vision (ICCV), 2019, pp. 1506-1516

Abstract


We present an imaging framework which converts three images from a gated camera into high-resolution depth maps with depth accuracy comparable to pulsed lidar measurements. Existing scanning lidar systems achieve low spatial resolution at large ranges due to mechanically-limited angular sampling rates, restricting scene understanding tasks to close-range clusters with dense sampling. Moreover, today's pulsed lidar scanners suffer from high cost, power consumption, large form-factors, and they fail in the presence of strong backscatter. We depart from point scanning and demonstrate that it is possible to turn a low-cost CMOS gated imager into a dense depth camera with at least 80m range - by learning depth from three gated images. The proposed architecture exploits semantic context across gated slices, and is trained on a synthetic discriminator loss without the need of dense depth labels. The proposed replacement for scanning lidar systems is real-time, handles back-scatter and provides dense depth at long ranges. We validate our approach in simulation and on real-world data acquired over 4,000km driving in northern Europe. Data and code are available at https://github.com/gruberto/Gated2Depth.

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[bibtex]
@InProceedings{Gruber_2019_ICCV,
author = {Gruber, Tobias and Julca-Aguilar, Frank and Bijelic, Mario and Heide, Felix},
title = {Gated2Depth: Real-Time Dense Lidar From Gated Images},
booktitle = {The IEEE International Conference on Computer Vision (ICCV)},
month = {October},
year = {2019}
}