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    Li Zhixin, Wei Haiyang, Zhang Canlong, Ma Huifang, Shi Zhongzhi. Research Progress on Image Captioning[J]. Journal of Computer Research and Development, 2021, 58(9): 1951-1974. DOI: 10.7544/issn1000-1239.2021.20200281
    Citation: Li Zhixin, Wei Haiyang, Zhang Canlong, Ma Huifang, Shi Zhongzhi. Research Progress on Image Captioning[J]. Journal of Computer Research and Development, 2021, 58(9): 1951-1974. DOI: 10.7544/issn1000-1239.2021.20200281

    Research Progress on Image Captioning

    • Image captioning combines the two research fields of computer vision and natural language processing. It requires not only complete image semantic understanding, but also complex natural language expression. It is a crucial task for further research on visual intelligence in line with human perception. This paper reviews the research progress on image captioning. Firstly, five key technologies involved in current deep learning based image captioning methods are summarized and analyzed, including overall architecture, learning strategy, feature mapping, language model and attention mechanism. Then, according to the development process, the existing image captioning methods are divided into four categories, i.e. template based methods, retrieval based methods, encoder-decoder architecture based methods and compositional architecture based methods. We describe the basic concepts, representative methods and research status of each category. Furthermore, we emphatically discuss the various methods based on encoder-decoder architecture and their innovative ideas, such as multimodal space, visual space, semantic space, attention mechanism, model optimization, and so on. Subsequently, from the experimental point of view, we show the common benchmark datasets and evaluation measures in the field of image captioning. In addition, we compare the performance of some typical methods on two benchmark datasets. Finally, based on improving the accuracy, integrity, novelty and diversity of image caption, several future development trends of image captioning are presented.
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