Learning to Adapt CLIP for Few-Shot Monocular Depth Estimation

Xueting Hu1; Ce Zhang1; Yi Zhang1; Bowen Hai1; Ke Yu1; Zhihai He1,2

10.1109/WACV57701.2024.00550

2024

2472-6737

979-8-3503-1893-7

2024 IEEE/CVF Winter Conference on Applications of Computer Vision (WACV)

3-8 Jan. 2024

Waikoloa, HI, USA

Pre-trained Vision-Language Models (VLMs), such as CLIP, have shown enhanced performance across a range of tasks that involve the integration of visual and linguistic modalities. When CLIP is used for depth estimation tasks, the patches, divided from the input images, can be combined with a series of semantic descriptions of the depth information to obtain similarity results. The coarse estimation of depth is then achieved by weighting and summing the depth values, called depth bins, corresponding to the predefined semantic descriptions. The zero-shot approach circumvents the computational and time-intensive nature of traditional fully-supervised depth estimation methods. However, this method, utilizing fixed depth bins, may not effectively generalize as images from different scenes may exhibit distinct depth distributions. To address this challenge, we propose a few-shot-based method which learns to adapt the VLMs for monocular depth estimation to balance training costs and generalization capabilities. Specifically, it assigns different depth bins for different scenes, which can be selected by the model during inference. Additionally, we incorporate learnable prompts to preprocess the input text to convert the easily human-understood text into easily model-understood vectors and further enhance the performance. With only one image per scene for training, our extensive experiment results on the NYU V2 and KITTI dataset demonstrate that our method outperforms the previous state-of-the-art method by up to 10.6% in terms of MARE1.

第一

EI

1.Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
2.Pengcheng Laboratory

Xueting Hu,Ce Zhang,Yi Zhang,et al. Learning to Adapt CLIP for Few-Shot Monocular Depth Estimation[C],2024.