  Much research work in computer vision is being spent on optimizing existing
network architectures to obtain a few more percentage points on benchmarks.
Recent AutoML approaches promise to relieve us from this effort. However, they
are mainly designed for comparatively small-scale classification tasks. In this
work, we show how to use and extend existing AutoML techniques to efficiently
optimize large-scale U-Net-like encoder-decoder architectures. In particular,
we leverage gradient-based neural architecture search and Bayesian optimization
for hyperparameter search. The resulting optimization does not require a
large-scale compute cluster. We show results on disparity estimation that
clearly outperform the manually optimized baseline and reach state-of-the-art
performance.
