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JPSC1400: Japanese Scene Character Dataset
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1. Release
Rel. 20201218  (18 Dec. 2020)

2. Keywords
Scene character, Japanese character, character recognition

3. Description
This is a Japanese scene character dataset intended to be used
for evaluating the accuracy of scene character recognition algorithms.
This dataset was compiled in our research group 
(https://www.imglab.org/db/) and has been used in some of our work.
We release it as an open dataset aiming to contribute to
the research community.

specifications:
- Consisting of Hiragana, Katakana, and Kanji characters
 (1,400 character images and 523 classes).
- A wide variety of sizes ranging from 25x25 to 616x710.
- The images were taken in real scenes in and around Sendai, Japan.
- Individual character images were manually cropped out
 from the natural images.

JPSC1400 does not cover all characters and the average 
number of samples per class is limited due to the difficulties 
in data collection. Some Japanese characters are used only in
some limited areas, and it is hard to collect all classes.

4. Files
- label.txt: Text file in UTF-8 showing the ground truth labels.
 The first column indicates the identification numbers of the images.
 The second column indicates the character code in UTF-8.
 The third column shows the actual characters.

- png/: Image files in Portable Network Graphics (PNG) format.

- ppm/: Image files in Portable PixMap (PPM) format.

5. References
[1] F. Horie and H. Goto, ``Synthetic Scene Character Generator 
 and Multi-Scale Voting Classifier for Japanese Scene Character 
 Recognition,'' Proc. of IVCNZ 2018, 2018. 
 doi: 10.1109/IVCNZ.2018.8634801

[2] F. Horie and H. Goto, ``Japanese Scene Character Recognition 
 Using Random Image Feature and Ensemble Scheme,''
 Proc. of ICPRAM 2019, 2019.

6. Authors
Fuma Horie
Graduate School of Information Science, Tohoku University, Japan
Email: fuma.horie.s3@dc.tohoku.ac.jp

Hideaki Goto
Cyberscience Center, Tohoku University, Japan
Email: hgot@cc.tohoku.ac.jp


LICENSE
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Copyright (c) 2020 Fuma Horie All Rights Reserved.

You may use, copy, modify, merge, and distribute this dataset
without restriction and free of charge, subject to the following
conditions.

- The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the dataset.

- Modification(s) made to the dataset and the reason(s) of the
  modification(s) must be clearly explained in a document, and
  the document shall be included in all copies or substantial
  portions of the dataset.

THE DATASET IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
THE AUTHOR(S) OR COPYRIGHT HOLDER(S) WILL NOT BE RESPONSIBLE FOR
ANY DAMAGE CAUSED BY THIS DATASET.
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