115 lines
3.2 KiB
Markdown
115 lines
3.2 KiB
Markdown
# World-Class UI & Alert Management Improvements
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## Problems Fixed
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### 1. Alert State Management ✅
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**Problem**: Alerts stayed ACTIVE forever once triggered, even when conditions cleared.
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**Solution**: Implemented temporal smoothing with alert persistence tracking:
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- Alerts clear automatically when conditions stop
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- Configurable persistence frames for each alert type
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- Smooth transitions between states
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### 2. UI Improvements for Chromium/Raspberry Pi ✅
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**Problem**:
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- Emojis not visible in Chromium
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- Poor visual feedback
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- Unprofessional appearance
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**Solution**:
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- Removed emojis, replaced with CSS-based indicators
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- Professional color-coded alert system
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- Modern card-based layout
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- Better visual hierarchy
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## Technical Implementation
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### Alert Persistence System
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```python
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# Track how long alerts have been inactive
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self.alert_persistence = {
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'Drowsiness': 0,
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'Distraction': 0,
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'Driver Absent': 0,
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'Phone Detected': 0,
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'No Seatbelt': 0,
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}
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# Frames to wait before clearing (temporal smoothing)
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self.alert_clear_frames = {
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'Drowsiness': 10, # ~0.3s at 30fps
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'Distraction': 8,
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'Driver Absent': 5, # Immediate
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'Phone Detected': 5,
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'No Seatbelt': 8,
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}
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```
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### Alert Clearing Logic
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```python
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if triggered:
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# Set alert active, reset counter
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self.alert_states[alert] = True
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self.alert_persistence[alert] = 0
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else:
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# Increment counter, clear if threshold reached
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self.alert_persistence[alert] += 1
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if self.alert_persistence[alert] >= threshold:
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self.alert_states[alert] = False
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```
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## UI Enhancements
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### CSS Styling
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- **Alert Active**: Red border, light red background
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- **Alert Normal**: Green border, light green background
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- **Status Badges**: Color-coded pills (ACTIVE/Normal)
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- **Modern Cards**: Clean, professional appearance
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- **Better Typography**: Improved readability
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### Visual Indicators
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- **ACTIVE**: Red badge with white text
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- **Normal**: Green badge with white text
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- **No Emojis**: Pure CSS/HTML for Chromium compatibility
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### Performance Optimizations
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- Optimized YOLO inference (contiguous arrays)
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- Faster image resizing (INTER_LINEAR)
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- Log management (limit to 10 entries)
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- Efficient frame processing
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## Benefits
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### User Experience
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✅ **Real-time feedback** - Alerts clear when conditions stop
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✅ **Professional appearance** - Modern, clean UI
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✅ **Better visibility** - Color-coded status indicators
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✅ **Smooth transitions** - No jarring state changes
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### Performance
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✅ **Faster inference** - Optimized YOLO processing
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✅ **Lower memory** - Limited log entries
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✅ **Better FPS** - Improved frame processing
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### Reliability
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✅ **Accurate alerts** - Temporal smoothing prevents false positives
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✅ **Consistent behavior** - Alerts clear predictably
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✅ **Cross-platform** - Works on Chromium/Raspberry Pi
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## Example Behavior
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### Phone Detection
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1. Phone appears → Alert becomes ACTIVE (red)
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2. Phone removed → Counter starts
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3. After 5 frames (~0.17s) → Alert clears to Normal (green)
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### Drowsiness Detection
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1. Eyes close → Alert becomes ACTIVE
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2. Eyes open → Counter starts
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3. After 10 frames (~0.3s) → Alert clears to Normal
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This prevents flickering while ensuring alerts clear when conditions stop!
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