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输出 | 双杯场景中的一项答案 | 做不到的逆推 |\n| --- | --- | --- |\n| 类别存在性 | 杯子、书 | 仅凭类别列表不能恢复左右杯位置 |\n| 检测 | 杯子 #1 的矩形框 | 外接框不能恢复杯把空洞 |\n| 语义类别图 | 这个像素是杯子 | 同类颜色不记录杯一与杯二的分界 |\n| 实例图 | 这个像素属于杯子 #1 | 可见轮廓不定义被书遮住的完整背面 |","sha256":"e32adae5457ad70607d8af8475e06a719416f6da7f990fed6fbf475ee152cd92","chapter":{"id":"II","title":"区域、像素与实例"},"unit":{"id":"spatial-answer-contract","title":"任务究竟要求留下什么信息？"},"page":{"id":"reading-opening","title":"同一场景中，究竟多交付了什么信息？","number":1},"sectionTitle":"同一场景中，究竟多交付了什么信息？","currentQuestion":"同一场景中，究竟多交付了什么信息？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"table":{"headers":["输出","双杯场景中的一项答案","做不到的逆推"],"rows":[["输出","双杯场景中的一项答案","做不到的逆推"],["类别存在性","杯子、书","仅凭类别列表不能恢复左右杯位置"],["检测","杯子 #1 的矩形框","外接框不能恢复杯把空洞"],["语义类别图","这个像素是杯子","同类颜色不记录杯一与杯二的分界"],["实例图","这个像素属于杯子 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映射为类别，得到语义图；反过来一般没有唯一答案。两只紧挨杯子的许多实例划分，都可能对应同一张“杯子”类别图。因此四种输出不是一条从粗糙到高级的单轴刻度，而是为不同用途保存不同信息。做面积测量需要像素集合，做计数需要对象身份，快速提示操作者位置可能只需要框。","sha256":"98c7b4f32a7446e4b772d3eefb9e924ae075c74daae544eb97dd967cd7a98f42","chapter":{"id":"II","title":"区域、像素与实例"},"unit":{"id":"spatial-answer-contract","title":"任务究竟要求留下什么信息？"},"page":{"id":"reading-opening","title":"同一场景中，究竟多交付了什么信息？","number":1},"sectionTitle":"同一场景中，究竟多交付了什么信息？","currentQuestion":"同一场景中，究竟多交付了什么信息？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-1e42535e10f9849e66564d87","nextBlock":"b-2b977502459344ba15bc6a02","prerequisites":[{"id":"b-70428d231f4354ec662a8261","url":"#b-70428d231f4354ec662a8261","role":"section-title"},{"id":"b-c578d23995e91216ee53a4e4","url":"#b-c578d23995e91216ee53a4e4","role":"problem-context"}],"relatedBlocks":[{"id":"b-25e8a208af9f4f1791ef5b3c","url":"#b-25e8a208af9f4f1791ef5b3c","relation":"figure-and-explanation"}]},{"id":"b-2b977502459344ba15bc6a02","type":"p","scope":"spatial-four-answers","url":"https://codingai-lec03.pages.dev/course/blocks/spatial-four-answers.html#b-2b977502459344ba15bc6a02","content":"本页轮廓与框是同一底图上的教学标注，帮助定义答案；它们不是模型预测。LAB03 可以直接改变选中对象并查看局部窗口，LAB10 和 LAB11 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03 课堂图解 P25；分类：图中有什么；杯子 · 书；检测：每个对象在哪里；类别 + 框；两只杯子；一册书；语义：每个像素是什么；颜色 = 类别；杯子；书；实例：属于哪一个对象；颜色 = 实例 ID；杯子 #1；杯子 #2；同一底图；框与可见轮廓为教学标注。输出结构不同，所需监督也不同。\n\n同一底图的四种输出；颜色分别承担类别或实例身份。 查看对应图解状态\n\n- 分类：图中有什么\n- 杯子 · 书\n- 检测：每个对象在哪里\n- 类别 + 框\n- 两只杯子\n- 一册书\n- 语义：每个像素是什么\n- 颜色 = 类别\n- 杯子\n- 书\n- 实例：属于哪一个对象\n- 颜色 = 实例 ID\n- 杯子 #1\n- 杯子 #2\n- 同一底图；框与可见轮廓为教学标注。输出结构不同，所需监督也不同。同一底图的四种输出；颜色分别承担类别或实例身份。 [查看对应图解状态](/#/l3-r2-p25/0)[查看完整图解](/#/l3-r2-p25/0)","sha256":"fefaafec7560ca7d70e57a764e38edc0045e9c599ff9153e4ea6c6f7c4149385","chapter":{"id":"II","title":"区域、像素与实例"},"unit":{"id":"spatial-answer-contract","title":"任务究竟要求留下什么信息？"},"page":{"id":"reading-opening","title":"同一场景中，究竟多交付了什么信息？","number":1},"sectionTitle":"同一场景中，究竟多交付了什么信息？","currentQuestion":"同一场景中，究竟多交付了什么信息？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"figure":{"caption":"同一底图的四种输出；颜色分别承担类别或实例身份。 查看对应图解状态","labels":["分类：图中有什么","杯子 · 书","检测：每个对象在哪里","类别 + 框","两只杯子","一册书","语义：每个像素是什么","颜色 = 类别","杯子","书","实例：属于哪一个对象","颜色 = 实例 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