| { |
| "default_mode": "document", |
| "modes": { |
| "none": { |
| "description": "No preprocessing (passthrough)", |
| "deskew": false, |
| "clahe": false, |
| "binarize": false, |
| "gamma_correction": false, |
| "sharpen": false, |
| "grayscale": false, |
| "target_size": null |
| }, |
| "auto": { |
| "description": "Inspect image and apply needed fixes automatically", |
| "deskew": true, |
| "clahe": "auto", |
| "binarize": false, |
| "gamma_correction": "auto", |
| "sharpen": "auto", |
| "grayscale": false, |
| "target_size": 1024 |
| }, |
| "document": { |
| "description": "Deskew + CLAHE contrast enhancement (default for general documents)", |
| "deskew": true, |
| "clahe": true, |
| "binarize": false, |
| "gamma_correction": false, |
| "sharpen": false, |
| "grayscale": false, |
| "target_size": 1024, |
| "clahe_clip_limit": 2.0, |
| "clahe_grid_size": 8 |
| }, |
| "low-contrast": { |
| "description": "Aggressive CLAHE + gamma correction for faded scans", |
| "deskew": true, |
| "clahe": true, |
| "binarize": false, |
| "gamma_correction": true, |
| "sharpen": false, |
| "grayscale": false, |
| "target_size": 1024, |
| "clahe_clip_limit": 4.0, |
| "gamma_value": 1.5 |
| }, |
| "grayscale": { |
| "description": "Convert to grayscale + Otsu binarization", |
| "deskew": true, |
| "clahe": false, |
| "binarize": true, |
| "gamma_correction": false, |
| "sharpen": false, |
| "grayscale": true, |
| "target_size": 1024 |
| }, |
| "high-resolution": { |
| "description": "Resize longest side to 1024 with Lanczos + sharpen", |
| "deskew": false, |
| "clahe": true, |
| "binarize": false, |
| "gamma_correction": false, |
| "sharpen": true, |
| "grayscale": false, |
| "target_size": 1024 |
| }, |
| "table": { |
| "description": "Deskew + CLAHE + sharpening for grid lines and table structure", |
| "deskew": true, |
| "clahe": true, |
| "binarize": false, |
| "gamma_correction": false, |
| "sharpen": true, |
| "grayscale": false, |
| "target_size": 1024, |
| "clahe_clip_limit": 3.0 |
| }, |
| "adaptive-binarize": { |
| "description": "Detect sideways orientation and apply local Sauvola binarization", |
| "deskew": true, |
| "clahe": false, |
| "binarize": "sauvola", |
| "gamma_correction": false, |
| "sharpen": false, |
| "grayscale": false, |
| "target_size": 1024 |
| }, |
| "photo-document": { |
| "description": "Perspective-correct photographed pages, detect sideways orientation, then enhance contrast and lighting", |
| "deskew": false, |
| "perspective_correction": true, |
| "clahe": true, |
| "binarize": false, |
| "gamma_correction": true, |
| "sharpen": false, |
| "grayscale": false, |
| "target_size": 1024, |
| "clahe_clip_limit": 3.0, |
| "gamma_value": 1.3 |
| } |
| }, |
| "_note": "Preprocessing is always optional. The raw input path remains available for baseline comparison. Applied steps are recorded in output metadata." |
| } |
|
|
