{"version":2,"relationshipURLBase":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html","relationshipResolution":"Resolve relative relationship URLs against relationshipURLBase; complete records and absolute URLs are in blocks.","title":"数据、破坏与瓶颈","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html","markdown":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.md","pages":[{"id":"reading-opening","title":"数据、破坏与瓶颈","unit":"数据、破坏与瓶颈","unitId":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","chapter":"course","number":1}],"aliases":[{"oldId":"b-0f009f8f87fa0ccb08fb4272","targetId":"b-0f009f8f87fa0ccb08fb4272","page":"reading-opening","operation":"move","beforeSHA256":"4730e90285e279b2564c179018b9df76aafd9db5dd2729f0f687ac380af591ed","afterSHA256":"4730e90285e279b2564c179018b9df76aafd9db5dd2729f0f687ac380af591ed","reason":"Same source body in authored semantic page"},{"oldId":"b-37b68bb701230e97122b04d3","targetId":"b-37b68bb701230e97122b04d3","page":"reading-opening","operation":"move","beforeSHA256":"62cf4ee0f6a1b3d2d3d8c6ab162c34d8d6c98376274beeeb942428097d28eedf","afterSHA256":"62cf4ee0f6a1b3d2d3d8c6ab162c34d8d6c98376274beeeb942428097d28eedf","reason":"Same source body in authored semantic page"},{"oldId":"b-a271bf1af3046bc2ddb3026f","targetId":"b-a271bf1af3046bc2ddb3026f","page":"reading-opening","operation":"move","beforeSHA256":"e91f24e4e4ca40e2099a0d81d30db6568f4bf2074b499eeee6e3959617bd97ac","afterSHA256":"e91f24e4e4ca40e2099a0d81d30db6568f4bf2074b499eeee6e3959617bd97ac","reason":"Same source body in authored semantic page"},{"oldId":"b-9d26d0e8b75042270cd74064","targetId":"b-9d26d0e8b75042270cd74064","page":"reading-opening","operation":"move","beforeSHA256":"0f845ef31b98ed8c96f689fea3088b0a7482be32b2d5510c83f9fcbb05da4c9d","afterSHA256":"0f845ef31b98ed8c96f689fea3088b0a7482be32b2d5510c83f9fcbb05da4c9d","reason":"Same source body in authored semantic page"},{"oldId":"b-5b74e1e05e3e8c0426cb0df6","targetId":"b-5b74e1e05e3e8c0426cb0df6","page":"reading-opening","operation":"move","beforeSHA256":"ffd82c5a863f2930d5cea61e508a508c1126c1a93e8bd026430f0daa4e1aa161","afterSHA256":"ffd82c5a863f2930d5cea61e508a508c1126c1a93e8bd026430f0daa4e1aa161","reason":"Same source body in authored semantic page"},{"oldId":"b-b50095ae43435eb2a510efc7","targetId":"b-b50095ae43435eb2a510efc7","page":"reading-opening","operation":"move","beforeSHA256":"b5b552b03d3348b7ffa5e79b679ae61d1637f36cb0126bd432501592ccf384e4","afterSHA256":"b5b552b03d3348b7ffa5e79b679ae61d1637f36cb0126bd432501592ccf384e4","reason":"Same source body in authored semantic page"},{"oldId":"b-b2d86ffcaafadb015cbad0be","targetId":"b-b2d86ffcaafadb015cbad0be","page":"reading-opening","operation":"move","beforeSHA256":"dddc3aa4792ce564399c5a9042008ef6961c269f1be67e70b99cb08f9ee8143d","afterSHA256":"dddc3aa4792ce564399c5a9042008ef6961c269f1be67e70b99cb08f9ee8143d","reason":"Same source body in authored semantic page"},{"oldId":"b-548d09cb02f265464279005b","targetId":"b-548d09cb02f265464279005b","page":"reading-opening","operation":"move","beforeSHA256":"e66f545513713358d5ac1cd3ddcc275038454a49c79c2353a84651c3442edbdd","afterSHA256":"e66f545513713358d5ac1cd3ddcc275038454a49c79c2353a84651c3442edbdd","reason":"Same source body in authored semantic page"},{"oldId":"block-32b1e5f410384ab9a6ae63440ff4f425--数据破坏与瓶颈","targetId":"b-5b74e1e05e3e8c0426cb0df6","operation":"retain-source-identity"}],"blocks":[{"id":"b-0f009f8f87fa0ccb08fb4272","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-0f009f8f87fa0ccb08fb4272","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":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-37b68bb701230e97122b04d3","prerequisites":[],"relatedBlocks":[]},{"id":"b-37b68bb701230e97122b04d3","type":"h1","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-37b68bb701230e97122b04d3","content":"# 数据、破坏与瓶颈","sha256":"62cf4ee0f6a1b3d2d3d8c6ab162c34d8d6c98376274beeeb942428097d28eedf","chapter":{"id":"course","title":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-0f009f8f87fa0ccb08fb4272","nextBlock":"b-a271bf1af3046bc2ddb3026f","prerequisites":[{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-a271bf1af3046bc2ddb3026f","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-a271bf1af3046bc2ddb3026f","content":"按问题继续","sha256":"e91f24e4e4ca40e2099a0d81d30db6568f4bf2074b499eeee6e3959617bd97ac","chapter":{"id":"course","title":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-37b68bb701230e97122b04d3","nextBlock":"b-9d26d0e8b75042270cd74064","prerequisites":[{"id":"b-37b68bb701230e97122b04d3","url":"#b-37b68bb701230e97122b04d3","role":"section-title"},{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-9d26d0e8b75042270cd74064","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-9d26d0e8b75042270cd74064","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":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-a271bf1af3046bc2ddb3026f","nextBlock":"b-5b74e1e05e3e8c0426cb0df6","prerequisites":[{"id":"b-37b68bb701230e97122b04d3","url":"#b-37b68bb701230e97122b04d3","role":"section-title"},{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-5b74e1e05e3e8c0426cb0df6","type":"h2","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-5b74e1e05e3e8c0426cb0df6","content":"## 数据、破坏与瓶颈","sha256":"ffd82c5a863f2930d5cea61e508a508c1126c1a93e8bd026430f0daa4e1aa161","chapter":{"id":"course","title":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-9d26d0e8b75042270cd74064","nextBlock":"b-b50095ae43435eb2a510efc7","prerequisites":[{"id":"b-37b68bb701230e97122b04d3","url":"#b-37b68bb701230e97122b04d3","role":"section-title"},{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-b50095ae43435eb2a510efc7","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-b50095ae43435eb2a510efc7","content":"按数字标签分层分出1257张训练图和540张保留图，之后才产生破坏。标签只用于分层和最终近邻评价，AE优化只读取像素。像素原值0–16除以16，统一到[0,1]；这里不是MNIST的28×28输入。","sha256":"b5b552b03d3348b7ffa5e79b679ae61d1637f36cb0126bd432501592ccf384e4","chapter":{"id":"course","title":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-5b74e1e05e3e8c0426cb0df6","nextBlock":"b-b2d86ffcaafadb015cbad0be","prerequisites":[{"id":"b-5b74e1e05e3e8c0426cb0df6","url":"#b-5b74e1e05e3e8c0426cb0df6","role":"section-title"},{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-b2d86ffcaafadb015cbad0be","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-b2d86ffcaafadb015cbad0be","content":"去噪输入按25%概率把像素置0，再叠加标准差0.15高斯噪声并裁剪到[0,1]。目标仍是原始清洁图像。两层stride2卷积将8×8压到16×2×2，线性层得到16维瓶颈；解码器从瓶颈扩展，再用转置卷积回到1×8×8，经sigmoid输出。","sha256":"dddc3aa4792ce564399c5a9042008ef6961c269f1be67e70b99cb08f9ee8143d","chapter":{"id":"course","title":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-b50095ae43435eb2a510efc7","nextBlock":"b-548d09cb02f265464279005b","prerequisites":[{"id":"b-5b74e1e05e3e8c0426cb0df6","url":"#b-5b74e1e05e3e8c0426cb0df6","role":"section-title"},{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-548d09cb02f265464279005b","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425.html#b-548d09cb02f265464279005b","content":"遮挡实验把8×8图像切为16个2×2patch。训练每图恰好隐藏8个patch，输入为两个通道：可见像素和二值mask。mask=1代表隐藏，能够区分“真黑像素”与“未知像素”。隐藏目标只出现在损失端，不能被送入编码器。","sha256":"e66f545513713358d5ac1cd3ddcc275038454a49c79c2353a84651c3442edbdd","chapter":{"id":"course","title":"数据、破坏与瓶颈"},"unit":{"id":"notebook-blocks/32b1e5f410384ab9a6ae63440ff4f425","title":"数据、破坏与瓶颈"},"page":{"id":"reading-opening","title":"数据、破坏与瓶颈","number":1},"sectionTitle":"数据、破坏与瓶颈","currentQuestion":"数据、破坏与瓶颈","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-b2d86ffcaafadb015cbad0be","nextBlock":null,"prerequisites":[{"id":"b-5b74e1e05e3e8c0426cb0df6","url":"#b-5b74e1e05e3e8c0426cb0df6","role":"section-title"},{"id":"b-0f009f8f87fa0ccb08fb4272","url":"#b-0f009f8f87fa0ccb08fb4272","role":"problem-context"}],"relatedBlocks":[]}]}
