94,326 research outputs found
Towards Robust Curve Text Detection with Conditional Spatial Expansion
It is challenging to detect curve texts due to their irregular shapes and
varying sizes. In this paper, we first investigate the deficiency of the
existing curve detection methods and then propose a novel Conditional Spatial
Expansion (CSE) mechanism to improve the performance of curve text detection.
Instead of regarding the curve text detection as a polygon regression or a
segmentation problem, we treat it as a region expansion process. Our CSE starts
with a seed arbitrarily initialized within a text region and progressively
merges neighborhood regions based on the extracted local features by a CNN and
contextual information of merged regions. The CSE is highly parameterized and
can be seamlessly integrated into existing object detection frameworks.
Enhanced by the data-dependent CSE mechanism, our curve text detection system
provides robust instance-level text region extraction with minimal
post-processing. The analysis experiment shows that our CSE can handle texts
with various shapes, sizes, and orientations, and can effectively suppress the
false-positives coming from text-like textures or unexpected texts included in
the same RoI. Compared with the existing curve text detection algorithms, our
method is more robust and enjoys a simpler processing flow. It also creates a
new state-of-art performance on curve text benchmarks with F-score of up to
78.4.Comment: This paper has been accepted by IEEE International Conference on
Computer Vision and Pattern Recognition (CVPR 2019
Pseudo-goldstino and electroweakinos via VBF processes at LHC
The multi-sector SUSY breaking predicts pseudo-goldstino which can couple to
the visible sector more strongly than the ordinary gavitino and thus induce the
decays of the lightest neutralino and chargino (collectively called
electroweakinos) inside the detector. In this note we study the electroweakino
pair productions via vector boson fusion (VBF) processes followed by decays to
pseudo-goldstino at the LHC. Our Monte Carlo simulations show that at the 14
TeV LHC with 3000 fb^{-1} luminosity the dominant production channel
pp->chargino+neutralino+2 jets can have a statistical significance above
2-sigma while other production channels are not accessible.Comment: Version in JHEP (comments added
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