812 research outputs found
Dynamic Low-Resolution Distillation for Cost-Efficient End-to-End Text Spotting
End-to-end text spotting has attached great attention recently due to its
benefits on global optimization and high maintainability for real applications.
However, the input scale has always been a tough trade-off since recognizing a
small text instance usually requires enlarging the whole image, which brings
high computational costs. In this paper, to address this problem, we propose a
novel cost-efficient Dynamic Low-resolution Distillation (DLD) text spotting
framework, which aims to infer images in different small but recognizable
resolutions and achieve a better balance between accuracy and efficiency.
Concretely, we adopt a resolution selector to dynamically decide the input
resolutions for different images, which is constraint by both inference
accuracy and computational cost. Another sequential knowledge distillation
strategy is conducted on the text recognition branch, making the low-res input
obtains comparable performance to a high-res image. The proposed method can be
optimized end-to-end and adopted in any current text spotting framework to
improve the practicability. Extensive experiments on several text spotting
benchmarks show that the proposed method vastly improves the usability of
low-res models. The code is available at
https://github.com/hikopensource/DAVAR-Lab-OCR/.Comment: Accept by ECCV202
MANGO: A Mask Attention Guided One-Stage Scene Text Spotter
Recently end-to-end scene text spotting has become a popular research topic
due to its advantages of global optimization and high maintainability in real
applications. Most methods attempt to develop various region of interest (RoI)
operations to concatenate the detection part and the sequence recognition part
into a two-stage text spotting framework. However, in such framework, the
recognition part is highly sensitive to the detected results (e.g.), the
compactness of text contours). To address this problem, in this paper, we
propose a novel Mask AttentioN Guided One-stage text spotting framework named
MANGO, in which character sequences can be directly recognized without RoI
operation. Concretely, a position-aware mask attention module is developed to
generate attention weights on each text instance and its characters. It allows
different text instances in an image to be allocated on different feature map
channels which are further grouped as a batch of instance features. Finally, a
lightweight sequence decoder is applied to generate the character sequences. It
is worth noting that MANGO inherently adapts to arbitrary-shaped text spotting
and can be trained end-to-end with only coarse position information (e.g.),
rectangular bounding box) and text annotations. Experimental results show that
the proposed method achieves competitive and even new state-of-the-art
performance on both regular and irregular text spotting benchmarks, i.e., ICDAR
2013, ICDAR 2015, Total-Text, and SCUT-CTW1500.Comment: Accepted to AAAI2021. Code is available at
https://davar-lab.github.io/publication.html or
https://github.com/hikopensource/DAVAR-Lab-OC
The History, Mechanism, and Clinical Application of Auricular Therapy in Traditional Chinese Medicine
Auricular therapy includes acupuncture, electroacupuncture, acupressure, lasering, cauterization, moxibustion, and bloodletting in the auricle. For 2500 years, people have employed auricular therapy for treating diseases, but the methods have been limited to bloodletting and cauterization. Only after 1957, the international scientific community became aware that the map of the ear resembles an inverted fetus, its introduction has led to auricular acupuncture (AA) becoming a more systemic approach, and, following the identification and standardization of more precise points, AA has been employed in clinical applications. The mechanisms of AA are considered to have a close relationship with the autonomic nervous system, the neuroendocrine system, neuroimmunological factors, neuroinflammation, and neural reflex, as well as antioxidation. Auricular therapy has been applied, for example, for pain relief, for the treatment of epilepsy, anxiety, and obesity, and for improving sleep quality. However, the mechanisms and evidence for auricular therapy warrant further study
True 3D imaging with monocular cues using holographic stereography
A quantitative condition is derived to evaluate the monocular accommodation
in holographic stereograms. We find that the reconstruction can be viewed as
true-3D image when the whole scene is located in the monocular cues area, with
compatible monocular cues and binocular cues. In contrast, it reveals incorrect
monocular cues in the visible multi-imaging area and the lacking information
area. To demonstrate our theoretical predictions, a pupil-function integral
imaging algorithm is developed to simulate the mono-eye observation, and a
holographic printing system is set up to fabricate the full-parallax
holographic stereogram. Both simulation and experimental results match our
theoretical predictions.Comment: 16 pages, 4 figure
Down-regulation of PKCĪ¶ in renal cell carcinoma and its clinicopathological implications
<p>Abstract</p> <p>Background</p> <p>Metastatic renal cell carcinoma (RCC) is highly resistant to systemic chemotherapy. Unfortunately, nearly all patients die of the metastatic and chemoresistant RCC. Recent studies have shown the atypical PKCĪ¶ is an important regulator of tumorigenesis. However, the correlation between PKC<b>Ī¶ </b>expression and the clinical outcome in RCC patients is unclear. We examined the level of PKCĪ¶ expression in human RCC.</p> <p>Methods</p> <p>PKCĪ¶ mRNA and protein expressions were examined by real-time polymerase chain reaction (PCR) and immunohistochemistry (IHC) respectively in RCC tissues of 144 patients. Cellular cytotoxicity and proliferation were assessed by MTT.</p> <p>Results</p> <p>PKCĪ¶ expression was significantly higher in normal than in cancerous tissues (<it>P </it>< 0.0001) by real-time PCR and IHC. Similarly, PKCĪ¶ expression was down-regulated in four renal cancer cell lines compared to immortalized benign renal tubular cells. Interestingly, an increase of PKCĪ¶ expression was associated with the elevated tumor grade (<it>P </it>= 0.04), but no such association was found in TNM stage (<it>P </it>= 0.13). Tumors with higher PKCĪ¶ expression were associated with tumor size (<it>P </it>= 0.048). Expression of higher PKCĪ¶ found a poor survival in patients with high tumor grade. Down-regulation of PKCĪ¶ showed the significant chemoresistance in RCC cell lines. Inactivation of PKCĪ¶ expression enhanced cellular resistance to cisplatin and paclitaxel, and proliferation in HK-2 cells by specific PKC<b>Ī¶ </b>siRNA and inhibitor.</p> <p>Conclusions</p> <p>PKCĪ¶ expression was associated with tumorigenesis and chemoresistance in RCC.</p
Oncometabolite 2-Hydroxyglutarate Is a Competitive Inhibitor of Ī±-Ketoglutarate-Dependent Dioxygenases
IDH1 and IDH2 mutations occur frequently in gliomas and acute myeloid leukemia, leading to simultaneous loss and gain of activities in the production of Ī±-ketoglutarate (Ī±-KG) and 2-hydroxyglutarate (2-HG), respectively. Here we demonstrate that 2-HG is a competitive inhibitor of multiple Ī±-KG-dependent dioxygenases, including histone demethylases and the TET family of 5-methlycytosine (5mC) hydroxylases. 2-HG occupies the same space as Ī±-KG does in the active site of histone demethylases. Ectopic expression of tumor-derived IDH1 and IDH2 mutants inhibits histone demethylation and 5mC hydroxylation. In glioma, IDH1 mutations are associated with increased histone methylation and decreased 5-hydroxylmethylcytosine (5hmC). Hence, tumor-derived IDH1 and IDH2 mutations reduce Ī±-KG and accumulate an Ī±-KG antagonist, 2-HG, leading to genome-wide histone and DNA methylation alterations
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