# OCR Fixes - 2026-01-20

**Last Updated:** 2026-01-20

## Issues Fixed

### 1. Confidence Score Showing 0.0% ✅

**Problem:** Overall confidence was showing 0.0% despite successful field extraction.

**Root Cause:** 
- Confidence calculation was too strict, requiring exact validation matches
- Names needed to start with capital letters, but normalized names might be lowercase
- If validation failed, fields didn't contribute to confidence weight

**Fix:**
- Made confidence calculation more lenient
- Check for letter presence instead of requiring capital start
- Give partial credit even if validation isn't perfect
- Added fallback: if confidence is 0 but fields exist, calculate minimum confidence based on field count
- Always add weight for fields that exist, even if validation is partial

**Files Modified:**
- `v2/api/ocr-business-card.php` - Enhanced `calculateParsingConfidence()` function
- `v2/api/ocr-business-card.php` - Added fallback confidence calculation

### 2. Company Field Contamination ✅

**Problem:** Company field included extra text: "0 ordio Lukas Klein Inside Sales Consultant lukas" instead of just "ordio"

**Root Cause:**
- Company extraction didn't properly filter out name and job title patterns
- Leading numbers (OCR artifacts) weren't removed
- Pattern matching was too greedy, including surrounding text

**Fix:**
- Enhanced company extraction to exclude extracted names
- Filter out job title keywords from company field
- Remove leading numbers (OCR artifacts like "0 ordio")
- Improved pattern matching to extract just company name
- Added validation to skip lines containing name parts or job titles
- Better handling of multi-word company names

**Files Modified:**
- `v2/api/ocr-business-card.php` - Enhanced `parseStructuredOCR()` company extraction
- `v2/api/ocr-business-card.php` - Enhanced `parsePatternBasedOCR()` company extraction

### 3. Preprocessing Status Display ✅

**Problem:** Preprocessing status wasn't shown in test endpoint response

**Fix:**
- Added `preprocessing_used` to API response
- Updated test endpoint to display preprocessing status
- Preprocessing is enabled by default (`OCR_PREPROCESSING_ENABLED = true`)

**Files Modified:**
- `v2/api/ocr-business-card.php` - Added preprocessing status to response
- `v2/admin/test-ocr-endpoint.php` - Display preprocessing status

## Testing

Test the fixes using:
```
http://localhost:8003/v2/admin/test-ocr-endpoint.php?debug=1
```

Expected improvements:
1. **Confidence Score:** Should now show meaningful percentage (e.g., 85-95% for good extractions)
2. **Company Field:** Should extract just "ordio" without name/title contamination
3. **Preprocessing:** Should show "✓ Aktiviert" if preprocessing is working

## Next Steps

1. Test with the Lukas Klein business card again
2. Verify confidence scores are now meaningful
3. Check that company field is clean
4. Monitor preprocessing status

## Related Files

- `v2/api/ocr-business-card.php` - Main OCR endpoint (fixed)
- `v2/config/image-preprocessing.php` - Preprocessing config (enabled by default)
- `v2/admin/test-ocr-endpoint.php` - Test page (enhanced display)