扩展图像是一个引导式外扩工作流，可将单张照片扩展为任意目标宽高比，无需裁剪或拉伸原始像素。流程会用纯绿色边框包裹原图以达到新画布尺寸，然后用 Qwen Image Edit 2511 仅替换绿色区域，实现可信的场景延续。核心节点——GetImageSize、ImageResizeKJv2、CustomCombo 和 ComfyNumberConvert——自动计算新尺寸和边距，确保原图居中且不被修改，周围边框为可编辑区域。
为保证新内容风格和主题一致，工作流可自动用 TextGenerateLTX2Prompt 和本地 VLM 后端（需自行配置）为缺失区域生成场景描述，再用 JsonExtractString 解析结果。ComfySwitchNode 可在自动描述和手动输入（PrimitiveStringMultiline）间切换。最终指令由 StringConcatenate 组装，并结合 CLIPLoader（如编辑模型需文本条件）引导 Qwen Image Edit 2511 合成与原图光影、材质和透视一致的新内容。PreviewAny 和 ImageCompare 便于对比和评估，SaveImageAdvanced 保存结果及元数据，便于复现。
API
Use this workflow from code
Every Comfy workflow is a JSON graph. The payload below is this workflow, exactly as ComfyUI runs it — fetch it from the URL, keep it in version control, or load it in ComfyUI and run it node by node.
Run it from TypeScript or Python with the Comfy SDK. The same code targets Comfy Cloud or a ComfyUI you host yourself — only the base URL changes.
// Install (beta)
npm i @comfyorg/sdk
// Run this workflow (TypeScript)
import { Comfy } from "@comfyorg/sdk";
const client = new Comfy({ apiKey: "comfyui-..." });
const wf = await client.workflows.fromFile("workflow_api.json");
const job = await client.run(wf);
await job.getOutputs("<output-node-id>")[0].toFile("output.png");The SDK takes a workflow in API format: open this workflow in ComfyUI and use File → Export Workflow (API).
Comfy Cloud API access requires a plan with an API key.
常见问题
