[{"data":1,"prerenderedAt":332},["ShallowReactive",2],{"content-/zh/advanced-tutorial/upscale-workflow":3},{"id":4,"title":5,"body":6,"description":16,"extension":325,"meta":326,"navigation":327,"path":328,"seo":329,"stem":330,"__hash__":331},"content/zh/advanced-tutorial/upscale-workflow.md","ComfyUI 高清放大终极指南 2026：从普通画质一路拉到 8K 超清",{"type":7,"value":8,"toc":306},"minimark",[9,13,17,25,28,33,36,41,48,61,65,76,84,88,98,106,108,112,115,119,133,137,143,154,158,167,169,173,176,200,202,206,274,276,280,283,298,300,303],[10,11,5],"h1",{"id":12},"comfyui-高清放大终极指南-2026从普通画质一路拉到-8k-超清",[14,15,16],"p",{},"到 2026 年，AI 画图、视频生成已经卷到飞起，但光跑出一张好看的基础图远远不够。不管你用的是 Flux、SDXL 还是最新的 LTX‑Video，受显卡显存限制，初始生成的基本都是“预览级分辨率”。",[14,18,19,20,24],{},"想把 1024 左右的小图，变成能商用、能打印、能做 4K 影视素材的 8K 超清画质，你需要一套真正专业的放大工作流。这篇教程不讲花里胡哨，只讲 2026 年最实用、最稳的 ComfyUI 高清放大思路，从简单拉伸升级到",[21,22,23],"strong",{},"AI 生成级画质修复","。",[26,27],"hr",{},[29,30,32],"h2",{"id":31},"一现代高清放大的三条路线","一、现代高清放大的三条路线",[14,34,35],{},"现在的放大不再只有一种，先选对方向，效果差十倍：",[37,38,40],"h3",{"id":39},"_1-非生成式放大保真优先","1. 非生成式放大（保真优先）",[14,42,43,44,47],{},"用 ",[21,45,46],{},"4x-UltraSharp、Real-ESRGAN、SwinIR"," 这类纯神经网络模型。",[49,50,51,55,58],"ul",{},[52,53,54],"li",{},"原理：靠算法插值补像素，不重画内容",[52,56,57],{},"适合：画面已经完美，只想变大，不想改一根头发、一片草",[52,59,60],{},"显卡：极省显存，速度飞快",[37,62,64],{"id":63},"_2-分块扩散放大补细节神器","2. 分块扩散放大（补细节神器）",[14,66,43,67,71,72,75],{},[68,69,70],"code",{},"Ultimate SD Upscale"," 或 ",[68,73,74],{},"Tiled Diffusion"," 这类节点。",[49,77,78,81],{},[52,79,80],{},"原理：把图切成小块，低降噪强度重新生成，补上毛孔、布料纹理、环境微细节",[52,82,83],{},"适合：人像、复杂材质，想要“AI 精修”而不只是单纯放大",[37,85,87],{"id":86},"_3-大模型画质修复专业商用级","3. 大模型画质修复（专业商用级）",[14,89,43,90,93,94,97],{},[21,91,92],{},"SUPIR","、",[21,95,96],{},"Flux-ControlNet 放大","这类大参数量模型。",[49,99,100,103],{},[52,101,102],{},"原理：靠超大模型“理解画面内容”，直接在更高分辨率上重绘",[52,104,105],{},"适合：高端商用、修复崩掉的 AI 图、无瑕疵 8K 输出",[26,107],{},[29,109,111],{"id":110},"二进阶工作流2026-主流混合-8k-放大方案","二、进阶工作流：2026 主流“混合 8K 放大方案”",[14,113,114],{},"高手不会只用一个节点，都是多阶段组合，这套直接能上生产：",[37,116,118],{"id":117},"第一阶段基础神经网络快速放大","第一阶段：基础神经网络快速放大",[14,120,121,122,125,126,71,129,132],{},"先用 ",[21,123,124],{},"Upscale Image (using Model)"," 节点，搭配 ",[21,127,128],{},"4x-Foolhardy Remacri",[21,130,131],{},"4x-UltraSharp","。\n先拉出一张干净、锐利的基础大图，给后面 AI 精修打底。",[37,134,136],{"id":135},"第二阶段分块潜变量精修","第二阶段：分块潜变量精修",[14,138,139,140,142],{},"把放大后的图用 VAE 编码，送入 ",[68,141,70],{},"：",[49,144,145,148,151],{},[52,146,147],{},"放大倍数：2.0（从 4K 拉到 8K）",[52,149,150],{},"降噪强度：0.32（黄金值，够加细节又不会乱改主体）",[52,152,153],{},"分块方式：Chess / Tiled（2026 首选 Chess，几乎不留拼接缝）",[37,155,157],{"id":156},"第三阶段supir-flux-最终润色","第三阶段：SUPIR / Flux 最终润色",[14,159,160,161,71,163,166],{},"最后过一遍 ",[21,162,92],{},[21,164,165],{},"Flux-ControlNet Tile","。\n相当于“磨皮+统一光影”，把分块痕迹抹平，整体更自然。",[26,168],{},[29,170,172],{"id":171},"三4k-8k-显存优化不爆显存的关键","三、4K / 8K 显存优化：不爆显存的关键",[14,174,175],{},"大图最容易报“显存不足”，记住这几招：",[49,177,178,184,190],{},[52,179,180,183],{},[21,181,182],{},"必开 Tiled VAE Decode","\n超过 2048px 就别用普通 VAE 解码，分块解码就算 8GB/12GB 显卡也能跑。",[52,185,186,189],{},[21,187,188],{},"能用 NVFP4 / FP8 就用","\n40 系、50 系 N 卡开 NVFP4 模型，显存占用直接砍半还几乎不损画质。",[52,191,192,195,196,199],{},[21,193,194],{},"先微缩再放大（圈内小技巧）","\n噪点多的图，先用 ",[68,197,198],{},"ImageScaleToTotalPixels"," 缩到约 0.35MP，再高降噪放大，画面会更干净。",[26,201],{},[29,203,205],{"id":204},"四2026-模型怎么选一张表看懂","四、2026 模型怎么选？一张表看懂",[207,208,209,226],"table",{},[210,211,212],"thead",{},[213,214,215,220,223],"tr",{},[216,217,219],"th",{"align":218},"left","类型",[216,221,222],{"align":218},"推荐模型",[216,224,225],{"align":218},"最适合场景",[227,228,229,241,252,263],"tbody",{},[213,230,231,235,238],{},[232,233,234],"td",{"align":218},"真实感 / 人像肤质",[232,236,237],{"align":218},"SUPIR、Magnific、SeedVR2",[232,239,240],{"align":218},"高清人像、毛孔、纹理",[213,242,243,246,249],{},[232,244,245],{"align":218},"动漫 / 插画",[232,247,248],{"align":218},"R-ESRGAN 4x+ Anime6B、SwinIR",[232,250,251],{"align":218},"线条干净、无杂色 grain",[213,253,254,257,260],{},[232,255,256],{"align":218},"通用快速放大",[232,258,259],{"align":218},"4x-UltraSharp、Remacri",[232,261,262],{"align":218},"社交媒体 4K 快速出图",[213,264,265,268,271],{},[232,266,267],{"align":218},"视频 4K 放大",[232,269,270],{"align":218},"FlashVSR、RTX Video Super Res",[232,272,273],{"align":218},"动画、视频帧时序稳定",[26,275],{},[29,277,279],{"id":278},"五2026-高清放大效果自检清单","五、2026 高清放大效果自检清单",[14,281,282],{},"做完放大可以按这几条自查：",[284,285,286,289,292,295],"ol",{},[52,287,288],{},"主体是否和原图一致？不一致就加 ControlNet Tile",[52,290,291],{},"天空、墙面有没有拼接格子？加大 Ultimate SD Upscale 的重叠像素",[52,293,294],{},"只是变大了，还是真的更清晰？想要更清晰必须用生成式放大",[52,296,297],{},"别人低配显卡能不能跑？记得用上 Tiled VAE",[26,299],{},[29,301,302],{"id":302},"总结",[14,304,305],{},"ComfyUI 放大早就不是一键拉伸了，而是一套技术活。\n把快速神经网络放大 + 分块扩散精修 + SUPIR 智能修复组合起来，你做出来的图能直接对标高端商业摄影。",{"title":307,"searchDepth":308,"depth":308,"links":309},"",2,[310,316,321,322,323,324],{"id":31,"depth":308,"text":32,"children":311},[312,314,315],{"id":39,"depth":313,"text":40},3,{"id":63,"depth":313,"text":64},{"id":86,"depth":313,"text":87},{"id":110,"depth":308,"text":111,"children":317},[318,319,320],{"id":117,"depth":313,"text":118},{"id":135,"depth":313,"text":136},{"id":156,"depth":313,"text":157},{"id":171,"depth":308,"text":172},{"id":204,"depth":308,"text":205},{"id":278,"depth":308,"text":279},{"id":302,"depth":308,"text":302},"md",{},true,"/zh/advanced-tutorial/upscale-workflow",{"title":5,"description":16},"zh/advanced-tutorial/upscale-workflow","H21t0ThNYggWE_EY8T1cJVlk11CyisEVeLad2aq9WDM",1773986044745]