From 16e49a6d9eb097ef00c37068b025f2b9d3ebbf45 Mon Sep 17 00:00:00 2001
From: Admin <admin@viaeon.com>
Date: Fri, 17 Jul 2026 20:52:36 +0000
Subject: [PATCH] fix: lower threshold for small order images (284x106)

---
 internal/captcha/handler.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/internal/captcha/handler.go b/internal/captcha/handler.go
index 0956d37..14806f8 100644
--- a/internal/captcha/handler.go
+++ b/internal/captcha/handler.go
@@ -896,8 +896,8 @@ func (h *Handler) detectYOLO(modelName, imageBase64 string) (*DetectionResult, e
 	// 需要转置 + NMS 后处理，坐标从 640x640 缩放到原图尺寸
 	// 对于小图片（order 提示图）使用更低的置信度阈值
 	confThresh := 0.25
-	if origW < 200 || origH < 100 {
-		confThresh = 0.1 // 小图使用更低阈值
+	if origW < 300 || origH < 150 {
+		confThresh = 0.05 // 小图使用更低阈值
 	}
 	detections := postprocessYOLO(output, origW, origH, confThresh, 0.45)