{"version":2,"relationshipURLBase":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html","relationshipResolution":"Resolve relative relationship URLs against relationshipURLBase; complete records and absolute URLs are in blocks.","title":"两个目标，两个分母","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html","markdown":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.md","pages":[{"id":"reading-opening","title":"两个目标，两个分母","unit":"两个目标，两个分母","unitId":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","chapter":"course","number":1}],"aliases":[{"oldId":"b-9951a75e6c8ac039f7677061","targetId":"b-9951a75e6c8ac039f7677061","page":"reading-opening","operation":"move","beforeSHA256":"4730e90285e279b2564c179018b9df76aafd9db5dd2729f0f687ac380af591ed","afterSHA256":"4730e90285e279b2564c179018b9df76aafd9db5dd2729f0f687ac380af591ed","reason":"Same source body in authored semantic page"},{"oldId":"b-ffb55c32db741bf636cf441e","targetId":"b-ffb55c32db741bf636cf441e","page":"reading-opening","operation":"move","beforeSHA256":"1d7cbc5416eda35a9d576d81d19e36fd1cb46c083ba256ba26a5561f828f4ba4","afterSHA256":"1d7cbc5416eda35a9d576d81d19e36fd1cb46c083ba256ba26a5561f828f4ba4","reason":"Same source body in authored semantic page"},{"oldId":"b-dc1ec617c52987592b9ffc13","targetId":"b-dc1ec617c52987592b9ffc13","page":"reading-opening","operation":"move","beforeSHA256":"e91f24e4e4ca40e2099a0d81d30db6568f4bf2074b499eeee6e3959617bd97ac","afterSHA256":"e91f24e4e4ca40e2099a0d81d30db6568f4bf2074b499eeee6e3959617bd97ac","reason":"Same source body in authored semantic page"},{"oldId":"b-a0190561c6594706f4d13b39","targetId":"b-a0190561c6594706f4d13b39","page":"reading-opening","operation":"move","beforeSHA256":"0f845ef31b98ed8c96f689fea3088b0a7482be32b2d5510c83f9fcbb05da4c9d","afterSHA256":"0f845ef31b98ed8c96f689fea3088b0a7482be32b2d5510c83f9fcbb05da4c9d","reason":"Same source body in authored semantic page"},{"oldId":"b-2426116a3bdfcfbe840d9f1a","targetId":"b-2426116a3bdfcfbe840d9f1a","page":"reading-opening","operation":"move","beforeSHA256":"1e535ce05cfe5eb3201aafe7ef126832c60a9410ac57616575ebfde505c66446","afterSHA256":"1e535ce05cfe5eb3201aafe7ef126832c60a9410ac57616575ebfde505c66446","reason":"Same source body in authored semantic page"},{"oldId":"b-c446b33b41d5c3ae6c077947","targetId":"b-c446b33b41d5c3ae6c077947","page":"reading-opening","operation":"move","beforeSHA256":"9060158f67fb888087b1cfe7c5d2615563c150a54cca1810d4c56bc38e373a25","afterSHA256":"9060158f67fb888087b1cfe7c5d2615563c150a54cca1810d4c56bc38e373a25","reason":"Same source body in authored semantic page"},{"oldId":"b-90d214327fa4f856ffd845d6","targetId":"b-90d214327fa4f856ffd845d6","page":"reading-opening","operation":"move","beforeSHA256":"753942ac9ea72b31d30c84cbe74029829e59d1719a4da85742d6b2c70eb963b4","afterSHA256":"753942ac9ea72b31d30c84cbe74029829e59d1719a4da85742d6b2c70eb963b4","reason":"Same source body in authored semantic page"},{"oldId":"b-acbaacddc75f1dc7a6b8a2be","targetId":"b-acbaacddc75f1dc7a6b8a2be","page":"reading-opening","operation":"move","beforeSHA256":"42cabe6994680b53287da6245e3f0848e31c397c51a1e603a17a7b92beb42962","afterSHA256":"42cabe6994680b53287da6245e3f0848e31c397c51a1e603a17a7b92beb42962","reason":"Same source body in authored semantic page"},{"oldId":"b-00e979eb77b3b86325f50faa","targetId":"b-00e979eb77b3b86325f50faa","page":"reading-opening","operation":"move","beforeSHA256":"79d395dacb4b5aa9e61ba1cfd4f2346b143578b0615df7f34834b5296f871c91","afterSHA256":"79d395dacb4b5aa9e61ba1cfd4f2346b143578b0615df7f34834b5296f871c91","reason":"Same source body in authored semantic page"},{"oldId":"b-328e09a60bf9ad8543aa3edd","targetId":"b-328e09a60bf9ad8543aa3edd","page":"reading-opening","operation":"move","beforeSHA256":"1cbb6c7f4f25501bf57adf425d88f283db4606e507ed82c508475aa5bdc67df6","afterSHA256":"1cbb6c7f4f25501bf57adf425d88f283db4606e507ed82c508475aa5bdc67df6","reason":"Same source body in authored semantic page"},{"oldId":"b-9fa52189e5fe0fe122b6be5a","targetId":"b-9fa52189e5fe0fe122b6be5a","page":"reading-opening","operation":"move","beforeSHA256":"cef23c50f292bcb2bca2815e5a828b3c6bc7aa17d2f02cb7bf45614e2ce86454","afterSHA256":"cef23c50f292bcb2bca2815e5a828b3c6bc7aa17d2f02cb7bf45614e2ce86454","reason":"Same source body in authored semantic page"},{"oldId":"block-f7555aca3cff49f492d243beb43d1bf6--两个目标两个分母","targetId":"b-2426116a3bdfcfbe840d9f1a","operation":"retain-source-identity"}],"blocks":[{"id":"b-9951a75e6c8ac039f7677061","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-9951a75e6c8ac039f7677061","content":"[LAB 08 · 图像重建：遮挡损失与表示评价](/course/notebooks/b5ba27f2c5ba4ec0922208a7d5dc80a4.html)","sha256":"4730e90285e279b2564c179018b9df76aafd9db5dd2729f0f687ac380af591ed","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-ffb55c32db741bf636cf441e","prerequisites":[],"relatedBlocks":[]},{"id":"b-ffb55c32db741bf636cf441e","type":"h1","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-ffb55c32db741bf636cf441e","content":"# 两个目标，两个分母","sha256":"1d7cbc5416eda35a9d576d81d19e36fd1cb46c083ba256ba26a5561f828f4ba4","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-9951a75e6c8ac039f7677061","nextBlock":"b-dc1ec617c52987592b9ffc13","prerequisites":[{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-dc1ec617c52987592b9ffc13","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-dc1ec617c52987592b9ffc13","content":"按问题继续","sha256":"e91f24e4e4ca40e2099a0d81d30db6568f4bf2074b499eeee6e3959617bd97ac","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-ffb55c32db741bf636cf441e","nextBlock":"b-a0190561c6594706f4d13b39","prerequisites":[{"id":"b-ffb55c32db741bf636cf441e","url":"#b-ffb55c32db741bf636cf441e","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-a0190561c6594706f4d13b39","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-a0190561c6594706f4d13b39","content":"索引恢复、去噪/遮挡ConvAE训练、PCA基线、独立冻结评价","sha256":"0f845ef31b98ed8c96f689fea3088b0a7482be32b2d5510c83f9fcbb05da4c9d","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-dc1ec617c52987592b9ffc13","nextBlock":"b-2426116a3bdfcfbe840d9f1a","prerequisites":[{"id":"b-ffb55c32db741bf636cf441e","url":"#b-ffb55c32db741bf636cf441e","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-2426116a3bdfcfbe840d9f1a","type":"h2","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-2426116a3bdfcfbe840d9f1a","content":"## 两个目标，两个分母","sha256":"1e535ce05cfe5eb3201aafe7ef126832c60a9410ac57616575ebfde505c66446","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-a0190561c6594706f4d13b39","nextBlock":"b-c446b33b41d5c3ae6c077947","prerequisites":[{"id":"b-ffb55c32db741bf636cf441e","url":"#b-ffb55c32db741bf636cf441e","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-c446b33b41d5c3ae6c077947","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-c446b33b41d5c3ae6c077947","content":"去噪的损失对所有像素平均：","sha256":"9060158f67fb888087b1cfe7c5d2615563c150a54cca1810d4c56bc38e373a25","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-2426116a3bdfcfbe840d9f1a","nextBlock":"b-90d214327fa4f856ffd845d6","prerequisites":[{"id":"b-2426116a3bdfcfbe840d9f1a","url":"#b-2426116a3bdfcfbe840d9f1a","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-90d214327fa4f856ffd845d6","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-90d214327fa4f856ffd845d6","content":"$L_{DAE}=\\frac1{BHW}\\sum_{b,p}(\\hat x_{bp}-x_{bp})^2.$","sha256":"753942ac9ea72b31d30c84cbe74029829e59d1719a4da85742d6b2c70eb963b4","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[{"latex":"L_{DAE}=\\frac1{BHW}\\sum_{b,p}(\\hat x_{bp}-x_{bp})^2.","definitionContext":"两个目标，两个分母"}],"previousBlock":"b-c446b33b41d5c3ae6c077947","nextBlock":"b-acbaacddc75f1dc7a6b8a2be","prerequisites":[{"id":"b-2426116a3bdfcfbe840d9f1a","url":"#b-2426116a3bdfcfbe840d9f1a","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-acbaacddc75f1dc7a6b8a2be","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-acbaacddc75f1dc7a6b8a2be","content":"遮挡模型只在隐藏集合M上平均：","sha256":"42cabe6994680b53287da6245e3f0848e31c397c51a1e603a17a7b92beb42962","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-90d214327fa4f856ffd845d6","nextBlock":"b-00e979eb77b3b86325f50faa","prerequisites":[{"id":"b-2426116a3bdfcfbe840d9f1a","url":"#b-2426116a3bdfcfbe840d9f1a","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-00e979eb77b3b86325f50faa","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-00e979eb77b3b86325f50faa","content":"$L_{mask}=\\frac{\\sum_{b,p}M_{bp}(\\hat x_{bp}-x_{bp})^2}{\\sum_{b,p}M_{bp}}.$","sha256":"79d395dacb4b5aa9e61ba1cfd4f2346b143578b0615df7f34834b5296f871c91","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[{"latex":"L_{mask}=\\frac{\\sum_{b,p}M_{bp}(\\hat x_{bp}-x_{bp})^2}{\\sum_{b,p}M_{bp}}.","definitionContext":"两个目标，两个分母"}],"previousBlock":"b-acbaacddc75f1dc7a6b8a2be","nextBlock":"b-328e09a60bf9ad8543aa3edd","prerequisites":[{"id":"b-2426116a3bdfcfbe840d9f1a","url":"#b-2426116a3bdfcfbe840d9f1a","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-328e09a60bf9ad8543aa3edd","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-328e09a60bf9ad8543aa3edd","content":"如果对整图算MSE，再把大量可见真值复制到输出，会人为改善分母。这也是重建面板与指标要分开说明的原因：图上为方便阅读将已知像素原样保留，数值只评价隐藏部分。","sha256":"1cbb6c7f4f25501bf57adf425d88f283db4606e507ed82c508475aa5bdc67df6","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-00e979eb77b3b86325f50faa","nextBlock":"b-9fa52189e5fe0fe122b6be5a","prerequisites":[{"id":"b-2426116a3bdfcfbe840d9f1a","url":"#b-2426116a3bdfcfbe840d9f1a","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-9fa52189e5fe0fe122b6be5a","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/f7555aca3cff49f492d243beb43d1bf6.html#b-9fa52189e5fe0fe122b6be5a","content":"两模型各自独立初始化并保存对应随机权重，Adam学习率0.003；去噪40轮，遮挡50轮。训练循环中每轮重新生成破坏，只有训练源图参与参数更新。","sha256":"cef23c50f292bcb2bca2815e5a828b3c6bc7aa17d2f02cb7bf45614e2ce86454","chapter":{"id":"course","title":"两个目标，两个分母"},"unit":{"id":"notebook-blocks/f7555aca3cff49f492d243beb43d1bf6","title":"两个目标，两个分母"},"page":{"id":"reading-opening","title":"两个目标，两个分母","number":1},"sectionTitle":"两个目标，两个分母","currentQuestion":"两个目标，两个分母","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-328e09a60bf9ad8543aa3edd","nextBlock":null,"prerequisites":[{"id":"b-2426116a3bdfcfbe840d9f1a","url":"#b-2426116a3bdfcfbe840d9f1a","role":"section-title"},{"id":"b-9951a75e6c8ac039f7677061","url":"#b-9951a75e6c8ac039f7677061","role":"problem-context"}],"relatedBlocks":[]}]}