2 research outputs found
Reverse-engineering Bar Charts Using Neural Networks
Reverse-engineering bar charts extracts textual and numeric information from
the visual representations of bar charts to support application scenarios that
require the underlying information. In this paper, we propose a neural
network-based method for reverse-engineering bar charts. We adopt a neural
network-based object detection model to simultaneously localize and classify
textual information. This approach improves the efficiency of textual
information extraction. We design an encoder-decoder framework that integrates
convolutional and recurrent neural networks to extract numeric information. We
further introduce an attention mechanism into the framework to achieve high
accuracy and robustness. Synthetic and real-world datasets are used to evaluate
the effectiveness of the method. To the best of our knowledge, this work takes
the lead in constructing a complete neural network-based method of
reverse-engineering bar charts
SilkViser:A Visual Explorer of Blockchain-based Cryptocurrency Transaction Data
Many blockchain-based cryptocurrencies provide users with online blockchain
explorers for viewing online transaction data. However, traditional blockchain
explorers mostly present transaction information in textual and tabular forms.
Such forms make understanding cryptocurrency transaction mechanisms difficult
for novice users (NUsers). They are also insufficiently informative for
experienced users (EUsers) to recognize advanced transaction information. This
study introduces a new online cryptocurrency transaction data viewing tool
called SilkViser. Guided by detailed scenario and requirement analyses, we
create a series of appreciating visualization designs, such as paper
ledger-inspired block and blockchain visualizations and ancient copper
coin-inspired transaction visualizations, to help users understand
cryptocurrency transaction mechanisms and recognize advanced transaction
information. We also provide a set of lightweight interactions to facilitate
easy and free data exploration. Moreover, a controlled user study is conducted
to quantitatively evaluate the usability and effectiveness of SilkViser.
Results indicate that SilkViser can satisfy the requirements of NUsers and
EUsers. Our visualization designs can compensate for the inexperience of NUsers
in data viewing and attract potential users to participate in cryptocurrency
transactions