8 research outputs found
A Multi-signal Variant for the GPU-based Parallelization of Growing Self-Organizing Networks
Among the many possible approaches for the parallelization of self-organizing
networks, and in particular of growing self-organizing networks, perhaps the
most common one is producing an optimized, parallel implementation of the
standard sequential algorithms reported in the literature. In this paper we
explore an alternative approach, based on a new algorithm variant specifically
designed to match the features of the large-scale, fine-grained parallelism of
GPUs, in which multiple input signals are processed at once. Comparative tests
have been performed, using both parallel and sequential implementations of the
new algorithm variant, in particular for a growing self-organizing network that
reconstructs surfaces from point clouds. The experimental results show that
this approach allows harnessing in a more effective way the intrinsic
parallelism that the self-organizing networks algorithms seem intuitively to
suggest, obtaining better performances even with networks of smaller size.Comment: 17 page
Data-Driven but Privacy-Conscious: Pedestrian Dataset De-identification via Full-Body Person Synthesis
The advent of data-driven technology solutions is accompanied by an
increasing concern with data privacy. This is of particular importance for
human-centered image recognition tasks, such as pedestrian detection,
re-identification, and tracking. To highlight the importance of privacy issues
and motivate future research, we motivate and introduce the Pedestrian Dataset
De-Identification (PDI) task. PDI evaluates the degree of de-identification and
downstream task training performance for a given de-identification method. As a
first baseline, we propose IncogniMOT, a two-stage full-body de-identification
pipeline based on image synthesis via generative adversarial networks. The
first stage replaces target pedestrians with synthetic identities. To improve
downstream task performance, we then apply stage two, which blends and adapts
the synthetic image parts into the data. To demonstrate the effectiveness of
IncogniMOT, we generate a fully de-identified version of the MOT17 pedestrian
tracking dataset and analyze its application as training data for pedestrian
re-identification, detection, and tracking models. Furthermore, we show how our
data is able to narrow the synthetic-to-real performance gap in a
privacy-conscious manner