The purpose of this paper is to point out and assay observable causal signals
within collections of static images. We achieve this goal in two steps. First,
we take a learning approach to observational causal inference, and build a
classifier that achieves state-of-the-art performance on finding the causal
direction between pairs of random variables, when given samples from their
joint distribution. Second, we use our causal direction finder to effectively
distinguish between features of objects and features of their contexts in
collections of static images. Our experiments demonstrate the existence of (1)
a relation between the direction of causality and the difference between
objects and their contexts, and (2) observable causal signals in collections of
static images.
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