Image Preprocessing
Receipt Sample
Drop local document image here
Supports PNG, JPG, WebP
Binarization Threshold
128
Contrast Boost
1.35x
Deskew Rotation Angle
-1.2°
Grayscale Normalization
Noise Thresholding (Median Filter)
Sharpen Character Edges
Processed Image & OCR Box Inspector
Avg Confidence
94.2%
Total Word Blocks
42
Character Error Rate
1.8%
Field Accuracy
100.0%
Confidence Distribution Heatmap
High (>90%)
Medium (70-90%)
Low (<70%)
Key Recognized Fields
Extracted OCR Plain Text
Comparing Raw Unfiltered OCR vs Preprocessed Filtered OCR
Raw / Unfiltered
Filtered Workbench