Learnable Prompt for Few-Shot Semantic Segmentation in Remote Sensing Domain

Steve Andreas Immanuel, Hagai Raja Sinulingga; Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) Workshops, 2024, pp. 2755-2761

Few-shot segmentation is a task to segment objects or regions of novel classes within an image given only a few annotated examples. In the generalized setting the task extends to segment both the base and the novel classes. The main challenge is how to train the model such that the addition of novel classes does not hurt the base classes performance also known as catastrophic forgetting. To mitigate this issue we use SegGPT as our base model and train it on the base classes. Then we use separate learnable prompts to handle predictions for each novel class. To handle various object sizes which typically present in remote sensing domain we perform patch-based prediction. To address the discontinuities along patch boundaries we propose a patch-and-stitch technique by re-framing the problem as an image inpainting task. During inference we also utilize image similarity search over image embeddings for prompt selection and novel class filtering to reduce false positive predictions. Based on our experiments our proposed method boosts the weighted mIoU of a simple fine-tuned SegGPT from 15.96 to 35.08 on the validation set of few-shot OpenEarthMap dataset given in the challenge.