{
  "job": "upscale",
  "rank": 1,
  "short": "1.25×",
  "title": {
    "zh": "放大",
    "en": "Upscale"
  },
  "about": {
    "zh": "用放大模型放到 1.25 倍，再轻轻重画补细节。",
    "en": "An upscale model to 1.25×, then a light redraw for detail."
  },
  "source": {
    "zh": "参考工作流的「通用放大」组",
    "en": "The reference workflow's general upscale group"
  },
  "packs": {},
  "upscaler": true,
  "after": "run_workflow saves the picture as before and the larger one beside it (prefix upscaled). The redraw sampler has the first one's steps and cfg at denoise 0.35: lower keeps more of the picture, higher adds more (and above 0.5 may change it). For 2× or more use upscale_tiled.",
  "gives": {
    "sampler": "redraw",
    "save": "save"
  },
  "notes": "1.25× and denoise 0.35: the source used 1.25 and 0.32; its author says more than 1.5× goes wrong, and 1.5× of 832×1216 is too much for a 6 GB card. ColorMatch mkl after the redraw is the source's, optional (KJNodes).",
  "upscale_by": 1.25,
  "nodes": {
    "upscaler": {
      "class_type": "UpscaleModelLoader",
      "inputs": {
        "model_name": "$upscaler"
      }
    },
    "enlarge": {
      "class_type": "ImageUpscaleWithModel",
      "inputs": {
        "upscale_model": [
          "upscaler",
          0
        ],
        "image": [
          "$save.images",
          "*"
        ]
      }
    },
    "fit": {
      "class_type": "ImageScaleBy",
      "inputs": {
        "image": [
          "enlarge",
          0
        ],
        "upscale_method": "lanczos",
        "scale_by": "$fit"
      }
    },
    "encode": {
      "class_type": "VAEEncode",
      "inputs": {
        "pixels": [
          "fit",
          0
        ],
        "vae": [
          "$decode.vae",
          "*"
        ]
      }
    },
    "redraw": {
      "class_type": "KSampler",
      "like": "$sampler",
      "inputs": {
        "model": [
          "$sampler.model",
          "*"
        ],
        "positive": [
          "$sampler.positive",
          "*"
        ],
        "negative": [
          "$sampler.negative",
          "*"
        ],
        "latent_image": [
          "encode",
          0
        ],
        "denoise": 0.35
      }
    },
    "decode": {
      "class_type": "VAEDecode",
      "inputs": {
        "samples": [
          "redraw",
          0
        ],
        "vae": [
          "$decode.vae",
          "*"
        ]
      }
    },
    "match": {
      "class_type": "ColorMatch",
      "optional": true,
      "inputs": {
        "image_ref": [
          "fit",
          0
        ],
        "image_target": [
          "decode",
          0
        ],
        "method": "mkl",
        "strength": 1.0,
        "multithread": true
      }
    },
    "save": {
      "class_type": "SaveImage",
      "inputs": {
        "images": [
          "match|decode",
          0
        ],
        "filename_prefix": "upscaled"
      }
    }
  },
  "extras": {
    "ColorMatch": "ComfyUI-KJNodes"
  },
  "models": [
    "2x_animesharp_v4",
    "4x_ultrasharp",
    "4x_animesharp"
  ],
  "tested": {
    "gpu": "RTX 4050 Laptop",
    "vram_gb": 6,
    "date": "2026-10-27",
    "runs": [
      {
        "model": "SDXL (Illustrious)",
        "size": "832×1216 → 1.25×",
        "seconds": 43
      }
    ]
  }
}