{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:Z2TZM335OLT6JXZTC6WTRVV3WR","short_pith_number":"pith:Z2TZM335","canonical_record":{"source":{"id":"1703.10217","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-03-17T13:38:13Z","cross_cats_sorted":[],"title_canon_sha256":"726dcad6d46ffac5cb9bbabc4c4e1a2dd428cfdb6b219c3f89e4f57ca1ca3f67","abstract_canon_sha256":"ad31215abad32513acacd34043b7fa4a199384277c4eb697b28eb58ce79cd296"},"schema_version":"1.0"},"canonical_sha256":"cea7966f7d72e7e4df3317ad38d6bbb45ca5daef28f1f499b21415c617b9b488","source":{"kind":"arxiv","id":"1703.10217","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10217","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10217v1","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10217","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"pith_short_12","alias_value":"Z2TZM335OLT6","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"Z2TZM335OLT6JXZT","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"Z2TZM335","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:Z2TZM335OLT6JXZTC6WTRVV3WR","target":"record","payload":{"canonical_record":{"source":{"id":"1703.10217","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-03-17T13:38:13Z","cross_cats_sorted":[],"title_canon_sha256":"726dcad6d46ffac5cb9bbabc4c4e1a2dd428cfdb6b219c3f89e4f57ca1ca3f67","abstract_canon_sha256":"ad31215abad32513acacd34043b7fa4a199384277c4eb697b28eb58ce79cd296"},"schema_version":"1.0"},"canonical_sha256":"cea7966f7d72e7e4df3317ad38d6bbb45ca5daef28f1f499b21415c617b9b488","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:41.401233Z","signature_b64":"P7aLDNyP4XAlU1189VMyoIRfgUP6eYl2Cx+Ygm1HXScy3BBZwa19hOWjJ4bASxahJi48lBOvmoC5U0sPiU+5CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cea7966f7d72e7e4df3317ad38d6bbb45ca5daef28f1f499b21415c617b9b488","last_reissued_at":"2026-05-18T00:31:41.400844Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:41.400844Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.10217","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:31:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8jXfauc9Iy5lr7uAOffR6ppWGXqwY4Lq+u6z2HA6dyiw+Ahx0/JukBhX2s0Z009SNCbVfhuFjr3VP15bOf0LAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-26T07:19:27.995461Z"},"content_sha256":"64723a38b6dfa399e9deda9d405a5957f35b5728e9f435e8311f944ce4d9db70","schema_version":"1.0","event_id":"sha256:64723a38b6dfa399e9deda9d405a5957f35b5728e9f435e8311f944ce4d9db70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:Z2TZM335OLT6JXZTC6WTRVV3WR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Smartphone Based Colorimetric Detection via Machine Learning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Abdullah Bayram, Ali Y. Mutlu, Gizem K. \\\"Ozdemir, Mehmet E. Solmaz, Nesrin Horzum, Volkan K{\\i}l{\\i}\\c{c}","submitted_at":"2017-03-17T13:38:13Z","abstract_excerpt":"We report the application of machine learning to smartphone based colorimetric detection of pH values. The strip images were used as the training set for Least Squares-Support Vector Machine (LS-SVM) classifier algorithms that were able to successfully classify the distinct pH values. The difference in the obtained image formats was found not to significantly affect the performance of the proposed machine learning approach. Moreover, the influence of the illumination conditions on the perceived color of pH strips was investigated and further experiments were carried out to study effect of colo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10217","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:31:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wg4bmvVxUxS7oaBj9Aew6vI0xsjewZsZUJ4UJtBrAti4Nwtgi0jriq+UWrPwyfOtcUXIer5jSHasKw8nILXEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-26T07:19:27.995812Z"},"content_sha256":"a94864f02ebdb40f35bca168f6c4962e3d46811c79f89c8d01db9d05cb79e426","schema_version":"1.0","event_id":"sha256:a94864f02ebdb40f35bca168f6c4962e3d46811c79f89c8d01db9d05cb79e426"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z2TZM335OLT6JXZTC6WTRVV3WR/bundle.json","state_url":"https://pith.science/pith/Z2TZM335OLT6JXZTC6WTRVV3WR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z2TZM335OLT6JXZTC6WTRVV3WR/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-26T07:19:27Z","links":{"resolver":"https://pith.science/pith/Z2TZM335OLT6JXZTC6WTRVV3WR","bundle":"https://pith.science/pith/Z2TZM335OLT6JXZTC6WTRVV3WR/bundle.json","state":"https://pith.science/pith/Z2TZM335OLT6JXZTC6WTRVV3WR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z2TZM335OLT6JXZTC6WTRVV3WR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:Z2TZM335OLT6JXZTC6WTRVV3WR","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ad31215abad32513acacd34043b7fa4a199384277c4eb697b28eb58ce79cd296","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-03-17T13:38:13Z","title_canon_sha256":"726dcad6d46ffac5cb9bbabc4c4e1a2dd428cfdb6b219c3f89e4f57ca1ca3f67"},"schema_version":"1.0","source":{"id":"1703.10217","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10217","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10217v1","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10217","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"pith_short_12","alias_value":"Z2TZM335OLT6","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"Z2TZM335OLT6JXZT","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"Z2TZM335","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:a94864f02ebdb40f35bca168f6c4962e3d46811c79f89c8d01db9d05cb79e426","target":"graph","created_at":"2026-05-18T00:31:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report the application of machine learning to smartphone based colorimetric detection of pH values. The strip images were used as the training set for Least Squares-Support Vector Machine (LS-SVM) classifier algorithms that were able to successfully classify the distinct pH values. The difference in the obtained image formats was found not to significantly affect the performance of the proposed machine learning approach. Moreover, the influence of the illumination conditions on the perceived color of pH strips was investigated and further experiments were carried out to study effect of colo","authors_text":"Abdullah Bayram, Ali Y. Mutlu, Gizem K. \\\"Ozdemir, Mehmet E. Solmaz, Nesrin Horzum, Volkan K{\\i}l{\\i}\\c{c}","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-03-17T13:38:13Z","title":"Smartphone Based Colorimetric Detection via Machine Learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10217","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:64723a38b6dfa399e9deda9d405a5957f35b5728e9f435e8311f944ce4d9db70","target":"record","created_at":"2026-05-18T00:31:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ad31215abad32513acacd34043b7fa4a199384277c4eb697b28eb58ce79cd296","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-03-17T13:38:13Z","title_canon_sha256":"726dcad6d46ffac5cb9bbabc4c4e1a2dd428cfdb6b219c3f89e4f57ca1ca3f67"},"schema_version":"1.0","source":{"id":"1703.10217","kind":"arxiv","version":1}},"canonical_sha256":"cea7966f7d72e7e4df3317ad38d6bbb45ca5daef28f1f499b21415c617b9b488","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cea7966f7d72e7e4df3317ad38d6bbb45ca5daef28f1f499b21415c617b9b488","first_computed_at":"2026-05-18T00:31:41.400844Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:41.400844Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P7aLDNyP4XAlU1189VMyoIRfgUP6eYl2Cx+Ygm1HXScy3BBZwa19hOWjJ4bASxahJi48lBOvmoC5U0sPiU+5CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:41.401233Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.10217","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64723a38b6dfa399e9deda9d405a5957f35b5728e9f435e8311f944ce4d9db70","sha256:a94864f02ebdb40f35bca168f6c4962e3d46811c79f89c8d01db9d05cb79e426"],"state_sha256":"169ec8223d47ce1c8b30385f720f524b9609cfe4a94022079aa549e76f170a6f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UImrCJAVrOsPD/YvN+ULtq0dUBhv32zbQYiazfJC43h6fj3SxfqDHWJhr8JZSExLHkPW6jQW7L2DIO3ZAOi6Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-26T07:19:27.997948Z","bundle_sha256":"bfcb7f0e99500336d5cc0ce14b640a53c38d7a911bf6f34d5ff8367e5f998053"}}