2020年度 東京大学中山研 研究室紹介

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Multimodal intelligence integrating
diverse data with deep learning
Computer
Vision
Natural
Language
Processing
Multimodal
Machine Learning
Deep Learning

3. 3
Robust/Few-shot
learning theory
ACCV’18, ICIP’19
ConvNets architectures
BMVC’13, ICIP’19
Fine-grained recognition
ICME’13, CLEF’13
Large-scale image tagging
CVPR’10, ECCV’10, ICPR’16
Medical image analysis
ISBI’18, CIKM’19,
Neurocomputing’19
Visual aesthetics analysis
ACMMM’18
Scene text erasing
WACV’20
Visual relationship detection
ISM’17, ICIP’20

4. 4
Word representation learning
IJCNLP’17, ICLR’18
Machine translation
MT’17, ACL’18, ACL’19, AAAI’20 Cross-lingual retrieval
EMNLP’15
a cat is trying to
eat the food
Image/video caption generation
COLING’16 , LREC’18
Visual phrase grounding
LREC’20
Multimodal machine
translation
CICLING’19
Unsupervised discourse parsing
SIGDIAL’18, TACL’20
Neural input method
NAACL’19

5.  Discriminative initialization of
Convolutional Neural Network (CNN)
[BMVC’13]
◦ Closed-form initialization using Fisher
Discriminant Analysis
 Frequency-domain CNNs
[ICIP’19, MMAsia’19]
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 Control the number of output words using a
recurrent neural network
Jin et al., Annotation Order Matters: Recurrent Image Annotator
for Arbitrary Length Image Tagging, In Proc. ICPR, 2016.

7.  Car types identification
 Plant species identification
◦ ImageCLEF 2013 Plant
Identification Challenge (1st place)
 Character recognition
◦ ICDAR Script identification
challenge (3rd place)
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Acura RLMitsubishi
Lancer
Toyota Camry
Audi S4 Honda Accord Mercedes-Benz C-Class

8.  Stochastically switch the cross-entropy loss（CCE）and the
mean absolute error loss（MAE）
8Hataya et al., LOL: LEARNING TO OPTIMIZE LOSS SWITCHING UNDER LABEL NOISE, 2018.

9.  There exist some “easy” examples which can be correctly
classified at the beginning stage of learning
 “Hard” data matters more
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Kishida et al., EMPIRICAL STUDY OF EASY AND HARD EXAMPLES IN CNN TRAINING, ICONIP 2019.

10.  Co-segmentation: extract common objects in multiple images
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Chen et al., Semantic Aware Attention Based Deep
Object Co-segmentation, In Proc. ACCV, 2018.

11. Han et al., "Learning More with Less: Conditional PGGAN-based Data Augmentation for Brain Metastases Detection Using
Highly-Rough Annotation on MR Images", In Proc. of CIKM, 2019.
Han et al., "Combining Noise-to-Image and Image-to-Image GANs: Brain MR Image Augmentation for Tumor Detection",
IEEE Access, Vol.7, pp.156966-156977, 2019.

12.  Erasing texts in general images
[WACV’20]
 Erasing general objects
[Lazarski, 2018]
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https://www.youtube.com/watch?v=JvTvyOeAGbU

13.  Diversification of decoding [ACL’19]
 Resource-efficient MT
◦ Compression of word vectors (99% off!) [ICLR’18]
◦ Rapid decoding [ACL’18, AAAI’20]
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Input
Beam
Search
Proposed
Syntactic Diversity

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 Obtain syntactic word features
Permutation
Matrix
→
update
steps

15.  Incorporate Quantum Walk for graph
representation learning
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a woman is slicing
some vegetables
a cat is trying to
eat the food
a dog is swimming
in the pool
Input
(frame
sequence)
Output (word sequence)
“Translation”
from
video to text!
<BOS> a woman is cooking in the kitchen <EOS>
context vector

17.  Multimodal Machine Translation
[CICLING’19]
◦ Improve translation with the help of vision
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 Phrase localization [LREC’20]
◦ Identify the image region for a given phrase

18.  Presentations at prestigious conferences/journals
◦ ACL, AAAI, WACV, TACL, ICIP (2020)
◦ ACL, CIKM, Neurocomputing, 3DV, ICIPx3 (2019)
◦ ACL, ICLR, ACCV, SIGDIAL, LREC (2018)
◦ IJCNLP, ICDAR (2017)
 Awards
◦ 言語処理学会年次大会 優秀賞、若手奨励賞 (2020)
◦ CVIM研究会奨励賞 (2020)
◦ 情報理工学系研究科長賞 (2020)
◦ 画像の認識・理解シンポジウム 学生奨励賞 (2019)
◦ 電子情報通信学会医用画像研究会奨励賞 (2019)
◦ 言語処理学会年次大会 最優秀賞 (2018)
◦ NMT@ACL outstanding paper award (2017)
◦ 人工知能学会全国大会 優秀賞, 学生奨励賞x2 (2017)
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19.  Faculty：1（Nakayama）
 PhD students：10
 Master’s students：12（4~5 per each year)
 Secretary：1
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20.  Monday: Group meeting (2~3h)
◦ Short progress report by all, discussion, study session
◦ Mainly organized by PhD students
 Wednesday: Main meeting (2~3h)
◦ Progress report (3~4 students)
◦ Presentation practice, etc.
 Others
◦ One-on-one meeting
◦ Project meeting
 No other hours on duty
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21.  Workstation (2GPUs) for each student
 Share machines
◦ 4GPUs x 4
◦ 8GPUs x 2
 Cloud computers
◦ University cloud system
◦ ABCI
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