diff --git a/backend/config/config.toml b/backend/config/config.toml
index e5b078c..2f33b91 100644
--- a/backend/config/config.toml
+++ b/backend/config/config.toml
@@ -90,7 +90,7 @@ min_sampling_interval = 1.5  # Optimized: balanced for ~12 second span
 # - 3-5: Minimal mode (significant cost savings, suitable for simple tasks)
 # - 6-8: Standard mode (recommended, balances information and cost) ⭐ Recommended
 # - 10-15: Rich mode (more context, suitable for complex tasks)
-max_images_per_event = 8
+# Note: This is controlled by processing.max_screenshots_per_extraction instead
 
 # ========== Content Analysis Configuration ==========
 # Enable content analysis
@@ -165,8 +165,7 @@ memory_cache_size = 500
 
 # Processing configuration
 [processing]
-# Perception layer configuration
-screenshot_interval = 1  # Screenshot interval (seconds)
+# Perception layer configuration (screenshot_interval controlled by monitoring.capture_interval)
 enable_screenshot_deduplication = true  # Enable screenshot deduplication
 
 # ========== Session Agent Merging Configuration ==========
diff --git a/backend/core/coordinator.py b/backend/core/coordinator.py
index a929c6c..cc7a8e0 100644
--- a/backend/core/coordinator.py
+++ b/backend/core/coordinator.py
@@ -30,7 +30,7 @@ def __init__(self, config: Dict[str, Any]):
         self.config = config
         self.processing_interval = config.get("monitoring.processing_interval", 30)
         self.window_size = config.get("monitoring.window_size", 60)
-        self.capture_interval = config.get("monitoring.capture_interval", 0.2)
+        self.capture_interval = config.get("monitoring.capture_interval", 1.0)
 
         # Initialize managers (lazy import to avoid circular dependencies)
         self.perception_manager = None
diff --git a/backend/core/settings.py b/backend/core/settings.py
index 1dd6338..153f394 100644
--- a/backend/core/settings.py
+++ b/backend/core/settings.py
@@ -376,9 +376,6 @@ def get_image_optimization_config(self) -> Dict[str, Any]:
             min_interval = float(
                 self.config_loader.get("image_optimization.min_sampling_interval", 2.0)
             )
-            max_images = int(
-                self.config_loader.get("image_optimization.max_images_per_event", 8)
-            )
             enable_content = self.config_loader.get(
                 "image_optimization.enable_content_analysis", True
             )
@@ -391,7 +388,6 @@ def get_image_optimization_config(self) -> Dict[str, Any]:
                 "strategy": strategy,
                 "phash_threshold": phash_threshold,
                 "min_interval": min_interval,
-                "max_images": max_images,
                 "enable_content_analysis": enable_content,
                 "enable_text_detection": enable_text,
             }
@@ -421,9 +417,6 @@ def set_image_optimization_config(self, config: Dict[str, Any]) -> bool:
                 "image_optimization.min_sampling_interval",
                 config.get("min_interval", 2.0),
             )
-            self.config_loader.set(
-                "image_optimization.max_images_per_event", config.get("max_images", 8)
-            )
             self.config_loader.set(
                 "image_optimization.enable_content_analysis",
                 config.get("enable_content_analysis", True),
@@ -446,7 +439,6 @@ def _get_default_image_optimization_config() -> Dict[str, Any]:
             "strategy": "hybrid",
             "phash_threshold": 0.15,
             "min_interval": 2.0,
-            "max_images": 8,
             "enable_content_analysis": True,
             "enable_text_detection": False,
         }
diff --git a/backend/models/responses.py b/backend/models/responses.py
index bbf0f75..ca232c2 100644
--- a/backend/models/responses.py
+++ b/backend/models/responses.py
@@ -271,7 +271,6 @@ class ImageOptimizationConfigData(BaseModel):
     strategy: str = "phash"
     phash_threshold: int = 10
     min_interval: float = 0.5
-    max_images: int = 10
     enable_content_analysis: bool = True
     enable_text_detection: bool = True