Seal Extractor
Detect the red seal area in an image, remove white background and noise, output a transparent PNG seal.
适合从扫描件、合同照片里抠出红色印章，输出透明底 PNG。图片不上传服务器。
红色敏感度40
调高＝只保留更纯的红
边缘强度1.4
调高＝印章更实，杂色更少
输出模式
印章颜色
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