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Instead, few-shot keypoint detection (FSKD) is an underexplored yet more general task of localizing either base or novel keypoints, depending on the prompted support samples. In FSKD, how to build robust keypoint representations is the key to success. To this end, we propose an FSKD approach that models relations between keypoints. As keypoints are located on objects, we exploit a class-agnostic visual prior,\n                    <jats:italic>i.e<\/jats:italic>\n                    ., the unsupervised saliency map or DINO attentiveness map to obtain the region of focus within which we perform relation learning between object patches. The class-agnostic visual prior also helps suppress the background noise largely irrelevant to keypoint locations. Then, we propose a novel Visual Prior guided Vision Transformer (VPViT). The visual prior maps are refined by a bespoke morphology learner to include relevant context of objects. The masked self-attention of VPViT takes the adapted prior map as a soft mask to constrain the self-attention to foregrounds. As robust FSKD must also deal with the low number of support samples and occlusions, based on VPViT, we further investigate i) transductive FSKD to enhance keypoint representations with unlabeled data and ii) FSKD with masking and alignment (MAA) to improve robustness. We show that our model performs well in seven public datasets, and also significantly improves the accuracy in transductive inference and under occlusions. Source codes are available at\n                    <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"https:\/\/github.com\/AlanLuSun\/VPViT\" ext-link-type=\"uri\">https:\/\/github.com\/AlanLuSun\/VPViT<\/jats:ext-link>\n                    .\n                  <\/jats:p>","DOI":"10.1007\/s11263-025-02671-5","type":"journal-article","created":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T05:21:57Z","timestamp":1768540917000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Exploiting Class-agnostic Visual Prior for Few-shot Keypoint Detection"],"prefix":"10.1007","volume":"134","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1894-286X","authenticated-orcid":false,"given":"Changsheng","family":"Lu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hao","family":"Zhu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Piotr","family":"Koniusz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2026,1,16]]},"reference":[{"key":"2671_CR1","unstructured":"Achiam, J., Adler, S., Agarwal, S., Ahmad, L., Akkaya, I., Aleman, F. 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