# Object Detection for Comics using Manga109 Annotations

Source: [Object Detection for Comics using Manga109 Annotations](<https://www.sota2.com/research/paper/68fa642d1e209131cea03347>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:56:35.491Z

Authors: Toru Ogawa, Atsushi Otsubo, Rei Narita, Yusuke Matsui, Toshihiko Yamasaki, Kiyoharu Aizawa

Published: 2018-03-23T06:54:48.000Z

## Abstract

With the growth of digitized comics, image understanding techniques are becoming important. In this paper, we focus on object detection, which is a fundamental task of image understanding. Although convolutional neural networks (CNN)-based methods archived good performance in object detection for naturalistic images, there are two problems in applying these methods to the comic object detection task. First, there is no large-scale annotated comics dataset. The CNN-based methods require large-scale annotations for training. Secondly, the objects in comics are highly overlapped compared to naturalistic images. This overlap causes the assignment problem in the existing CNN-based methods. To solve these problems, we proposed a new annotation dataset and a new CNN model. We annotated an existing image dataset of comics and created the largest annotation dataset, named Manga109-annotations. For the assignment problem, we proposed a new CNN-based detector, SSD300-fork. We compared SSD300-fork with other detection methods using Manga109-annotations and confirmed that our model outperformed them based on the mAP score.

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

- [Body Detection on Manga 109 Bodies (test)](<https://www.sota2.com/research/sota/body-detection-on-manga-109-bodies-test.md>): Body Detection; Manga 109 Bodies (test); AP: 79.6.

- [Face Detection on Manga 109 Faces (test)](<https://www.sota2.com/research/sota/face-detection-on-manga-109-faces-test.md>): Face Detection; Manga 109 Faces (test); AP: 76.2.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1803.08670>)

[PDF](<https://arxiv.org/pdf/1803.08670.pdf>)