{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/fine-grained-object-classification-via-self","title":"Fine-Grained Object Classification via Self-Supervised Pose Alignment","arxiv_id":"2203.15987","date":"2022-03-30","proceeding":"CVPR 2022 1","authors":["Xuhui Yang","YaoWei Wang","Ke Chen","Yong Xu","Yonghong Tian"],"abstract":"Semantic patterns of fine-grained objects are determined by subtle appearance difference of local parts, which thus inspires a number of part-based methods. However, due to uncontrollable object poses in images, distinctive details carried by local regions can be spatially distributed or even self-occluded, leading to a large variation on object representation. For discounting pose variations, this paper proposes to learn a novel graph based object representation to reveal a global configuration of local parts for self-supervised pose alignment across classes, which is employed as an auxiliary feature regularization on a deep representation learning network.Moreover, a coarse-to-fine supervision together with the proposed pose-insensitive constraint on shallow-to-deep sub-networks encourages discriminative features in a curriculum learning manner. We evaluate our method on three popular fine-grained object classification benchmarks, consistently achieving the state-of-the-art performance. Source codes are available at https://github.com/yangxh11/P2P-Net.","url_abs":"https://arxiv.org/abs/2203.15987v1","url_pdf":"https://arxiv.org/pdf/2203.15987v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"abstracts"},"code_links":[{"paper_slug":"fine-grained-object-classification-via-self","repo_url":"https://github.com/yangxh11/p2p-net","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":1,"framework":"pytorch","reach":{"status":"ok"}},{"paper_slug":"fine-grained-object-classification-via-self","repo_url":"https://github.com/salwaalkhatib/p2p-net","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"pytorch","reach":null}],"tasks":[{"task_slug":"classification-1","task_name":"Classification"},{"task_slug":"object","task_name":"Object"},{"task_slug":"representation-learning","task_name":"Representation Learning"}],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":"https://app.syntology.ai/?focus=2203.15987","mcp":{"get_harvested_code_for_paper":{"arxiv_id":"2203.15987"}},"developers":"https://syntology.ai/developers","read_at":"2026-09-24T18:15:14+00:00","read_at_is":"when the build read Syntology's graph, not when any sample ran","claim":"Per-sample execution status on synthesized fixtures; not a correctness claim about the paper. Samples come from repositories linked to the paper, official or community; repo_kind says which.","repos":[{"provenance":"external:paperswithcode_snapshot_2025-07-28","url":"https://github.com/salwaalkhatib/p2p-net","reach":null},{"provenance":"external:paperswithcode_snapshot_2025-07-28","url":"https://github.com/yangxh11/p2p-net","reach":{"status":"ok"}},{"provenance":"deterministic:regex_extraction","url":"https://github.com/yangxh11/P2P-Net","reach":{"status":"ok"}}],"summary":{"ran":6,"ran_draft_wrong":1,"unverified":3},"by_repo_kind":{"official":{"samples":6,"ran":4,"repositories":1},"listed":{"samples":4,"ran":3,"repositories":1}},"repo_kind_vocabulary":{"official":"The archive marks this repository official for the paper","named_in_paper":"The archive records that the paper mentions this repository; it is not marked official","listed":"In the archive's code links for this paper, not marked official and not recorded as mentioned in the paper","found_in_text":"Syntology found this repository in the paper's own text; whether it is the authors' implementation is not asserted","community":"Not in the archive's code links for this paper; a community repository Syntology harvested"},"n_pointer_only_for_licence":10,"samples":[{"code_sha256_prefix":"0731f5b92077e214","entry":"BasicConv","repo":"yangxh11/P2P-Net","repo_kind":"official","path":"model.py","file_url":"https://github.com/yangxh11/P2P-Net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran","verification_level":1,"contract_check":null,"metamorphic_tier":"deterministic","behaviour_fingerprint":true,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"0731f5b92077e214"}},{"code_sha256_prefix":"d4600e974186982c","entry":"PartsResort","repo":"yangxh11/P2P-Net","repo_kind":"official","path":"model.py","file_url":"https://github.com/yangxh11/P2P-Net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran","verification_level":1,"contract_check":null,"metamorphic_tier":null,"behaviour_fingerprint":false,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"d4600e974186982c"}},{"code_sha256_prefix":"1092693b739f30ed","entry":"ProposalNet","repo":"yangxh11/P2P-Net","repo_kind":"official","path":"model.py","file_url":"https://github.com/yangxh11/P2P-Net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran","verification_level":1,"contract_check":null,"metamorphic_tier":"deterministic","behaviour_fingerprint":true,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"1092693b739f30ed"}},{"code_sha256_prefix":"19ceaf0b80046465","entry":"QuickGELU","repo":"salwaalkhatib/p2p-net","repo_kind":"listed","path":"model.py","file_url":"https://github.com/salwaalkhatib/p2p-net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran","verification_level":1,"contract_check":null,"metamorphic_tier":"invariant","behaviour_fingerprint":true,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"19ceaf0b80046465"}},{"code_sha256_prefix":"456fa1217672f45e","entry":"ResidualAttentionBlock","repo":"salwaalkhatib/p2p-net","repo_kind":"listed","path":"model.py","file_url":"https://github.com/salwaalkhatib/p2p-net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran","verification_level":1,"contract_check":null,"metamorphic_tier":"deterministic","behaviour_fingerprint":false,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"456fa1217672f45e"}},{"code_sha256_prefix":"bfb226fc1123320e","entry":"Transformer","repo":"salwaalkhatib/p2p-net","repo_kind":"listed","path":"model.py","file_url":"https://github.com/salwaalkhatib/p2p-net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran","verification_level":1,"contract_check":null,"metamorphic_tier":"deterministic","behaviour_fingerprint":true,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"bfb226fc1123320e"}},{"code_sha256_prefix":"baa6ed537245246b","entry":"hard_nms","repo":"yangxh11/P2P-Net","repo_kind":"official","path":"model.py","file_url":"https://github.com/yangxh11/P2P-Net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"ran_draft_wrong","verification_level":1,"contract_check":"MISDECLARED","metamorphic_tier":"invariant","behaviour_fingerprint":false,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"baa6ed537245246b"}},{"code_sha256_prefix":"3287c3716eee4871","entry":"PMG","repo":"yangxh11/P2P-Net","repo_kind":"official","path":"model.py","file_url":"https://github.com/yangxh11/P2P-Net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"unverified","verification_level":0,"contract_check":null,"metamorphic_tier":null,"behaviour_fingerprint":false,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"3287c3716eee4871"}},{"code_sha256_prefix":"4c7378afc9492fd5","entry":"PMG","repo":"salwaalkhatib/p2p-net","repo_kind":"listed","path":"model.py","file_url":"https://github.com/salwaalkhatib/p2p-net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"unverified","verification_level":0,"contract_check":null,"metamorphic_tier":null,"behaviour_fingerprint":false,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"4c7378afc9492fd5"}},{"code_sha256_prefix":"6f12d37d5e94c298","entry":"generate_default_anchor_maps","repo":"yangxh11/P2P-Net","repo_kind":"official","path":"model.py","file_url":"https://github.com/yangxh11/P2P-Net/blob/HEAD/model.py","link_basis":"first_harvest_node","language":"python","status":"unverified","verification_level":0,"contract_check":null,"metamorphic_tier":null,"behaviour_fingerprint":false,"licence":"NONE","inline_ok":false,"mcp_get_code":{"code_sha256":"6f12d37d5e94c298"}}]},"arxiv_metadata":null,"syntology_extracted_results":null}