diff --git a/plugins/logic_gate/color_analyzer.cpp b/plugins/logic_gate/color_analyzer.cpp
index 7eb2b5c..affbacd 100644
--- a/plugins/logic_gate/color_analyzer.cpp
+++ b/plugins/logic_gate/color_analyzer.cpp
@@ -68,10 +68,15 @@ ColorResult ColorAnalyzer::Analyze(const Frame& frame, const Rect& bbox) {
             result = AnalyzeBrightness(center.data(), inner_w, inner_h, 3);
             break;
         default:
-            result = AnalyzeHSV(center.data(), inner_w, inner_h, 3);
+            LogWarn("[ColorAnalyzer] Unsupported color method: " +
+                    std::to_string(static_cast<int>(config_.method)));
             break;
     }
-    
+
+    if (!result.valid) {
+        return result;
+    }
+
     // 判断是否为劳保鞋颜色
     result.is_dark = IsSafetyBootsColor(result);
     
@@ -184,6 +189,7 @@ ColorResult ColorAnalyzer::AnalyzeHSV(const uint8_t* data, int w, int h, int cha
     result.dark_ratio = dark_pixels / static_cast<float>(total_pixels);
     result.light_ratio = 1.0f - result.dark_ratio;
     result.confidence = result.dark_ratio;
+    result.valid = true;
     
     return result;
 }
@@ -213,6 +219,7 @@ ColorResult ColorAnalyzer::AnalyzeRGB(const uint8_t* data, int w, int h, int cha
     result.dark_ratio = dark_pixels / static_cast<float>(total_pixels);
     result.light_ratio = 1.0f - result.dark_ratio;
     result.confidence = result.dark_ratio;
+    result.valid = true;
     
     return result;
 }
diff --git a/plugins/logic_gate/color_analyzer.h b/plugins/logic_gate/color_analyzer.h
index 8cd65f5..4eb7d71 100644
--- a/plugins/logic_gate/color_analyzer.h
+++ b/plugins/logic_gate/color_analyzer.h
@@ -24,6 +24,7 @@ struct ColorConfig {
 
 // 颜色分析结果
 struct ColorResult {
+    bool valid = false;             // 分析结果是否有效
     bool is_dark = false;           // 是否为深色
     float brightness = 0.0f;        // 平均亮度（0-255）
     float confidence = 0.0f;        // 置信度
diff --git a/plugins/logic_gate/logic_gate_node.cpp b/plugins/logic_gate/logic_gate_node.cpp
index f85d283..eae2b7a 100644
--- a/plugins/logic_gate/logic_gate_node.cpp
+++ b/plugins/logic_gate/logic_gate_node.cpp
@@ -200,6 +200,11 @@ private:
             if (method == "hsv") config.color.method = ColorMethod::HSV;
             else if (method == "rgb") config.color.method = ColorMethod::RGB;
             else if (method == "brightness") config.color.method = ColorMethod::BRIGHTNESS;
+            else {
+                LogWarn("[logic_gate] unsupported color_check.method=" + method +
+                        ", disabling color analysis");
+                config.enable_color_check = false;
+            }
             config.color.dark_threshold = color->ValueOr<int>("dark_threshold", 80);
             config.color.roi_expand = color->ValueOr<float>("roi_expand", 1.0f);
             config.color.center_w_scale = color->ValueOr<float>("center_w_scale", 0.6f);
@@ -384,12 +389,21 @@ private:
                             " match_score=" + std::to_string(match_score));
                 }
                 if (!pass_gate) continue;
+                if (config_.person_shoe.enable_size_preferred && !size_preferred) {
+                    if (config_.debug) {
+                        LogInfo("[logic_gate] skip non_preferred shoe person_track=" +
+                                std::to_string(person.track_id) +
+                                " det_idx=" + std::to_string(static_cast<int>(shoe_indices[si])) +
+                                " bbox=(" + std::to_string(static_cast<int>(shoe.bbox.x)) + "," +
+                                std::to_string(static_cast<int>(shoe.bbox.y)) + "," +
+                                std::to_string(static_cast<int>(shoe.bbox.w)) + "," +
+                                std::to_string(static_cast<int>(shoe.bbox.h)) + ")");
+                    }
+                    continue;
+                }
 
                 ++candidate_count;
-                const bool should_replace =
-                    best_shoe_local < 0 ||
-                    (size_preferred && !best_size_preferred) ||
-                    (size_preferred == best_size_preferred && match_score > best_match_score);
+                const bool should_replace = best_shoe_local < 0 || match_score > best_match_score;
                 if (should_replace) {
                     best_shoe_local = static_cast<int>(si);
                     best_match_score = match_score;
@@ -479,6 +493,13 @@ private:
 
             const Rect mapped_bbox = MapDetCoordToFrame(boot.bbox, frame);
             const auto color_result = color_analyzer_->Analyze(*frame, mapped_bbox);
+            if (!color_result.valid) {
+                if (config_.debug) {
+                    LogInfo("[logic_gate] skip invalid color result track_id=" +
+                            std::to_string(boot.track_id));
+                }
+                continue;
+            }
             if (color_result.is_dark) continue;
 
             Detection no_boots_det;