Canonical sample
Exact recipe
[
{
"condition": "low_light",
"parameters": {
"gain": 0.79,
"shot_noise_sigma": 11.7
},
"severity": 0.3
},
{
"condition": "noise",
"parameters": {
"gaussian_sigma": 32.6
},
"severity": 0.9
}
]Quality metrics
{
"blur_laplacian_variance": 10552.2089,
"brightness_mean": 192.5337,
"brightness_std": 38.3667,
"contrast_rms": 38.3667,
"damage_coverage": 0.999965,
"document_area_fraction": 0.988748,
"edge_distortion": 0.047186,
"glare_coverage": 0.005041,
"mean_color_shift": 54.0425,
"shadow_coverage": 0.026048
}OCR output + metrics
{
"engine": "tesseract",
"engine_version": "5.5.0",
"exit_code": 0,
"field_metrics": {
"date_field_accuracy": 0,
"field_exact_match": 0,
"field_normalized_match": 0,
"matched_fields": 0,
"numeric_field_accuracy": 0,
"total_fields": 35
},
"field_results": [
{
"exact_match": false,
"field_id": "currency",
"field_type": "currency",
"normalized_match": false,
"value": "EUR"
},
{
"exact_match": false,
"field_id": "customer_address",
"field_type": "customer_address",
"normalized_match": false,
"value": "6 Plaza del Archivo, 28013 Madrid, Spain"
},
{
"exact_match": false,
"field_id": "customer_name",
"field_type": "customer_name",
"normalized_match": false,
"value": "Nocturne Data Labs"
},
{
"exact_match": false,
"field_id": "discount",
"field_type": "discount",
"normalized_match": false,
"value": "€0.00"
},
{
"exact_match": false,
"field_id": "due_date",
"field_type": "due_date",
"normalized_match": false,
"value": "2026-09-10"
},
{
"exact_match": false,
"field_id": "invoice_date",
"field_type": "invoice_date",
"normalized_match": false,
"value": "2026-08-27"
},
{
"exact_match": false,
"field_id": "invoice_number",
"field_type": "invoice_number",
"normalized_match": false,
"value": "B26-990599"
},
{
"exact_match": false,
"field_id": "line_item_header",
"field_type": "line_item_header",
"normalized_match": false,
"value": "AMOUNT"
},
{
"exact_match": false,
"field_id": "payment_terms",
"field_type": "payment_terms",
"normalized_match": false,
"value": "Net 14"
},
{
"exact_match": false,
"field_id": "shipping",
"field_type": "shipping",
"normalized_match": false,
"value": "€0.00"
},
{
"exact_match": false,
"field_id": "subtotal",
"field_type": "subtotal",
"normalized_match": false,
"value": "€4,363.32"
},
{
"exact_match": false,
"field_id": "supplier_address",
"field_type": "supplier_address",
"normalized_match": false,
"value": "7 Speicherstrasse, 8005 Zürich, Schweiz"
},
{
"exact_match": false,
"field_id": "supplier_name",
"field_type": "supplier_name",
"normalized_match": false,
"value": "Copperline Records GmbH"
},
{
"exact_match": false,
"field_id": "tax",
"field_type": "tax",
"normalized_match": false,
"value": "€916.30"
},
{
"exact_match": false,
"field_id": "total",
"field_type": "total",
"normalized_match": false,
"value": "€5,279.62"
},
{
"exact_match": false,
"field_id": "line_item_0_description",
"field_type": "line_item_description",
"line_item_index": 0,
"normalized_match": false,
"value": "Document scanning service"
},
{
"exact_match": false,
"field_id": "line_item_0_quantity",
"field_type": "line_item_quantity",
"line_item_index": 0,
"normalized_match": false,
"value": "16"
},
{
"exact_match": false,
"field_id": "line_item_0_unit_price",
"field_type": "line_item_unit_price",
"line_item_index": 0,
"normalized_match": false,
"value": "€109.08"
},
{
"exact_match": false,
"field_id": "line_item_0_tax",
"field_type": "line_item_tax",
"line_item_index": 0,
"normalized_match": false,
"value": "21.0%"
},
{
"exact_match": false,
"field_id": "line_item_0_amount",
"field_type": "line_item_amount",
"line_item_index": 0,
"normalized_match": false,
"value": "€1,745.28"
},
{
"exact_match": false,
"field_id": "line_item_1_description",
"field_type": "line_item_description",
"line_item_index": 1,
"normalized_match": false,
"value": "Tamper-evident labels"
},
{
"exact_match": false,
"field_id": "line_item_1_quantity",
"field_type": "line_item_quantity",
"line_item_index": 1,
"normalized_match": false,
"value": "11"
},
{
"exact_match": false,
"field_id": "line_item_1_unit_price",
"field_type": "line_item_unit_price",
"line_item_index": 1,
"normalized_match": false,
"value": "€77.13"
},
{
"exact_match": false,
"field_id": "line_item_1_tax",
"field_type": "line_item_tax",
"line_item_index": 1,
"normalized_match": false,
"value": "21.0%"
},
{
"exact_match": false,
"field_id": "line_item_1_amount",
"field_type": "line_item_amount",
"line_item_index": 1,
"normalized_match": false,
"value": "€848.43"
},
{
"exact_match": false,
"field_id": "line_item_2_description",
"field_type": "line_item_description",
"line_item_index": 2,
"normalized_match": false,
"value": "Acid-free dividers"
},
{
"exact_match": false,
"field_id": "line_item_2_quantity",
"field_type": "line_item_quantity",
"line_item_index": 2,
"normalized_match": false,
"value": "17"
},
{
"exact_match": false,
"field_id": "line_item_2_unit_price",
"field_type": "line_item_unit_price",
"line_item_index": 2,
"normalized_match": false,
"value": "€93.90"
},
{
"exact_match": false,
"field_id": "line_item_2_tax",
"field_type": "line_item_tax",
"line_item_index": 2,
"normalized_match": false,
"value": "21.0%"
},
{
"exact_match": false,
"field_id": "line_item_2_amount",
"field_type": "line_item_amount",
"line_item_index": 2,
"normalized_match": false,
"value": "€1,596.30"
},
{
"exact_match": false,
"field_id": "line_item_3_description",
"field_type": "line_item_description",
"line_item_index": 3,
"normalized_match": false,
"value": "Secure courier envelopes"
},
{
"exact_match": false,
"field_id": "line_item_3_quantity",
"field_type": "line_item_quantity",
"line_item_index": 3,
"normalized_match": false,
"value": "1"
},
{
"exact_match": false,
"field_id": "line_item_3_unit_price",
"field_type": "line_item_unit_price",
"line_item_index": 3,
"normalized_match": false,
"value": "€173.31"
},
{
"exact_match": false,
"field_id": "line_item_3_tax",
"field_type": "line_item_tax",
"line_item_index": 3,
"normalized_match": false,
"value": "21.0%"
},
{
"exact_match": false,
"field_id": "line_item_3_amount",
"field_type": "line_item_amount",
"line_item_index": 3,
"normalized_match": false,
"value": "€173.31"
}
],
"ground_truth_text": "Copperline Records GmbH Invoice 7 Speicherstrasse, 8005 Zürich, Schweiz BILL TO INVOICE NO. Nocturne Data Labs B26-990599 6 Plaza del Archivo, 28013 Madrid, Spain INVOICE DATE 2026-08-27 DUE DATE 2026-09-10 PAYMENT TERMS Net 14 CURRENCY EUR DESCRIPTION QTY UNIT TAX AMOUNT Document scanning service 16 €109.08 21.0% €1,745.28 Tamper-evident labels 11 €77.13 21.0% €848.43 Acid-free dividers 17 €93.90 21.0% €1,596.30 Secure courier envelopes 1 €173.31 21.0% €173.31 SUBTOTAL €4,363.32 DISCOUNT €0.00 SHIPPING €0.00 VAT 21% €916.30 TOTAL €5,279.62 Payment reference: B26-990599 · Fictional entities · synthetic invoice",
"methodology_version": "spatial-field-lines-v1",
"metrics": {
"cer": 1.004934,
"date_field_accuracy": 0,
"field_exact_match": 0,
"field_normalized_match": 0,
"matched_fields": 0,
"numeric_field_accuracy": 0,
"total_fields": 35,
"wer": 2.488889
},
"sequence_metrics": {
"cer": 1.004934,
"reading_order": "spatial-field-lines-v1",
"wer": 2.488889
},
"stderr": "",
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}Generation provenance
{
"artifact_id": "dt-87fe40a0130b2250518705a4",
"degradation_asset_registry_version": null,
"generated_at": "2026-09-05T06:11:06.812103+00:00",
"recipe": null,
"renderer": "canonical",
"renderer_version": "pillow-opencv-v0.5.0-physical-assets-v1",
"request_sha256": "87fe40a0130b2250518705a47cfc14868c5a389b4d78dc14c8f9f86de6ce1009",
"seed": 10601,
"software": {
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},
"template_id": "invoice-nordic-minimal-v1"
}