@inproceedings{
wu2024lotlip,
title={Lo{TLIP}: Improving Language-Image Pre-training for Long Text Understanding},
author={Wei Wu and Kecheng Zheng and Shuailei Ma and Fan Lu and Yuxin Guo and Yifei Zhang and Wei Chen and Qingpei Guo and Yujun Shen and Zheng-Jun Zha},
booktitle={The Thirty-eighth Annual Conference on Neural Information Processing Systems},
year={2024},
url={https://openreview.net/forum?id=pc4GSBi1Hx}
}
In this work, we empirically confirm that the key reason causing such an issue is that the training images are usually paired with short captions, leaving certain tokens easily overshadowed by salient tokens. Towards this problem, our initial attempt is to relabel the data with long captions, however, directly learning with which may lead to performance degradation in understanding short text (e.g., in the image classification task). Then, after incorporating corner tokens to aggregate diverse textual information, we manage to help the model catch up to its original level of short text understanding yet greatly enhance its capability of long text understanding. We further look into whether the model can continuously benefit from longer captions and notice a clear trade-off between the performance and the efficiency. Finally, we validate the effectiveness of our approach using a self-constructed large-scale dataset, which consists of 100M long caption oriented text-image pairs. It is noteworthy that, on the task of long-text image retrieval, we beat the competitor using long captions with 11.1% improvement (i.e., from 72.62% to 83.72%). The project page is available at https://wuw2019.github.io/lot-lip.
LoTLIP: Improving Language-Image Pre-training for Long Text Understanding
Wei Wu Kecheng Zheng Shuailei Ma Fan Lu Yuxin Guo Yifei Zhang Wei Chen Qingpei Guo Yujun Shen Zheng-Jun Zha