# Real-Time Highly Accurate Dense Depth on a Power Budget using an FPGA-CPU Hybrid SoC

## TL;DR

This paper presents a hybrid FPGA-CPU system that achieves real-time, highly accurate dense depth estimation from stereo images with low power consumption, suitable for embedded applications.

## Contribution

A novel FPGA-CPU hybrid stereo depth estimation method combining SGM and ELAS features, enabling high accuracy and real-time performance on embedded hardware.

## Key findings

- 8.7% error rate on KITTI 2015 dataset
- Over 50 FPS processing speed
- Power consumption of only 5W

## Abstract

Obtaining highly accurate depth from stereo images in real time has many applications across computer vision and robotics, but in some contexts, upper bounds on power consumption constrain the feasible hardware to embedded platforms such as FPGAs. Whilst various stereo algorithms have been deployed on these platforms, usually cut down to better match the embedded architecture, certain key parts of the more advanced algorithms, e.g. those that rely on unpredictable access to memory or are highly iterative in nature, are difficult to deploy efficiently on FPGAs, and thus the depth quality that can be achieved is limited. In this paper, we leverage a FPGA-CPU chip to propose a novel, sophisticated, stereo approach that combines the best features of SGM and ELAS-based methods to compute highly accurate dense depth in real time. Our approach achieves an 8.7% error rate on the challenging KITTI 2015 dataset at over 50 FPS, with a power consumption of only 5W.