diff --git a/src/main/utils/ocr.ts b/src/main/utils/ocr.ts
index b0079f2a50..ca63e82f07 100644
--- a/src/main/utils/ocr.ts
+++ b/src/main/utils/ocr.ts
@@ -7,8 +7,6 @@ const preprocessImage = async (buffer: Buffer) => {
     .grayscale() // 转为灰度
     .normalize()
     .sharpen()
-    .threshold(100) // 可能需要根据具体图片调整
-    .png({ quality: 100 })
     .toBuffer()
 }