ComfyUI 是一款強大的圖像生成與處理工具，以其模組化的節點式工作流設計，讓使用者能夠細緻地控制 AI 繪圖的每個步驟。無論是生成高品質圖像，還是對生成結果進行後期優化，ComfyUI 都提供了極大的彈性，讓創作者能夠根據需求自由調整細節。在 AI 繪圖的過程中，臉部細節往往是最容易失真的部分，特別是在高解析度圖像或是複雜場景中，AI 可能無法準確還原面部特徵，導致模糊、畸變或細節缺失。這時候，我們可以使用 FaceDetailer 來解決這個問題。
FaceDetailer 是一種專門用來增強臉部細節的技術，透過 AI 模型精準識別人臉，並對其進行獨立處理，使五官更加清晰、輪廓更為銳利，甚至可以修復 AI 繪圖過程中產生的瑕疵。在 ComfyUI 中，我們可以利用 FaceDetailer 來對輸出的圖像進行局部修復與強化，確保角色的臉部細節達到最佳效果。為了讓這個功能順利運行，我們將會使用兩個客製化節點 ComfyUI-Impact-Pack 和 ComfyUI-Impact-Subpack，這兩個擴充套件提供了額外的工具，使 FaceDetailer 得以成真，並能夠與 ComfyUI 流暢整合，因此在開始之前，必須先完成這些擴充套件的安裝。（ComfyUI 安裝客製化教學點我前往）
本文將提供完整的範例工作流，讓大家可以直接套用，輕鬆上手 FaceDetailer，體驗 AI 繪圖之臉部修復的強大功能！
▲ 此畫面顯示 ComfyUI Manager 內的客製化節點管理介面，請確認已安裝 ComfyUI-Impact-Pack 和 ComfyUI-Impact-Subpack 兩個擴充節點，這些工具是進行 FaceDetailer 臉部修復的必要元件。
▲ 這是此次 ComfyUI 工作流的部分設定，其中 FaceDetailer 負責對臉部進行修復，並透過 UltralyticsDetectorProvider 節點來檢測臉部範圍。我們使用 bbox/face_yolov8n_v2.pt 來精準識別人臉，確保效果最佳。（點我前往下載 face_yolov8n_v2.pt）
模型請放在 C:\Users\[使用者名稱]\Documents\ComfyUI\models\ultralytics\bbox\face_yolov8n_v2.pt。
FaceDetailer 的各項參數決定了 AI 修復臉部細節的方式與精細程度。為了提升修復精準度，我們啟用了 bbox_detector，它負責檢測人臉範圍，確保修復時不會影響到背景或其他細節。這與 UltralyticsDetectorProvider 節點搭配使用，模型名稱設為 bbox/face_yolov8n_v2.pt，這是一款專門用於臉部偵測的 YOLOv8 模型，能有效標記人臉區域，提高修復精確度。steps 設為 20，讓 FaceDetailer 有足夠的運算步驟來精細化臉部紋理，基本上參數都用預設值效果就很不錯了！
▲ 左側為原始 AI 生成圖，右側則是經過 FaceDetailer 修復後的版本，可以看到臉部細節變得更清晰，眼神更自然，五官的銳利度也有所提升，使最終效果更加細膩且富有層次感。除了臉部修復，還能替換表情喔！請參考下一篇文章！
📝 工作流：comfyui_with_facedetailer.json
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《上一篇》ComfyUI Manager 安裝客製化節點（Custom Nodes）教學 
《下一篇》ComfyUI x FaceDetailer：AI 繪圖變換表情的神奇技巧！ 
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