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Author SHA1 Message Date
Abimael MartellandClaude Opus 4.6 5159abe9c2 fix clippy warnings: prefix unused page_has_gid, cfg(test) wrapper
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-13 19:53:28 -07:00
Abimael MartellandClaude Opus 4.6 843a745460 relax table extraction validation for layout-assisted regions (0.4.3)
Two changes that reduce false needsOcr rejections without hurting quality:

1. Per-region GID check instead of per-page blanket rejection.
   Previously, if ANY font on the page used GID-encoded glyphs (common
   in logos, decorative fonts), ALL table and text regions on that page
   were forced to GPU OCR via needsOcr=true. Now the page-level bail is
   removed; per-region text quality checks (is_garbage_text, is_cid_garbage,
   detect_encoding_issues) catch actual GID corruption in the extracted
   content. Tables whose text is clean pass through even if an unrelated
   font elsewhere on the page is GID-encoded.

2. Relaxed looks_like_partial_table for layout-assisted extraction.
   When the layout model already identified a region as a table (i.e.,
   extract_tables_in_regions_mem), boundary-detection heuristics are
   less necessary — we're not guessing "is this a table?" anymore, only
   "can we extract it correctly?". Relaxations:
   - Numeric first header cell accepted (e.g., year "2024")
   - 1 empty header cell allowed in 3+ column tables (merged headers)
   - Sparse first data row threshold relaxed from 33% to 50%
   Paragraph detection and duplicate-header checks remain strict.

Eval: 196/196 pass (full regression suite), 91/91 Rust tests pass
including 7 new layout-assisted validation tests. Zero regressions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-13 19:46:56 -07:00
2 changed files with 145 additions and 25 deletions
+1 -1
View File
@@ -1,6 +1,6 @@
{
"name": "firecrawl-pdf-inspector",
"version": "0.4.2",
"version": "0.4.3",
"description": "Fast PDF classification and text extraction. Detect text-based vs scanned PDFs, extract text by region with quality checks. Native Rust performance via napi-rs.",
"main": "index.js",
"types": "index.d.ts",
+144 -24
View File
@@ -399,7 +399,7 @@ pub fn extract_text_in_regions_mem(
let page_1idx = page_0idx + 1;
let items = items_by_page.get(&page_1idx);
let page_h = page_heights.get(&page_1idx).copied().unwrap_or(792.0);
let page_has_gid = gid_pages.contains(&page_1idx);
let _page_has_gid = gid_pages.contains(&page_1idx);
let adaptive_threshold = page_thresholds.get(&page_1idx).copied().unwrap_or(0.10);
let coords = if rotated_pages.contains(&page_1idx) {
RegionCoordSpace::Rotated90Ccw
@@ -426,8 +426,10 @@ pub fn extract_text_in_regions_mem(
None => String::new(),
};
// Check per-region text quality instead of blanket page-level
// GID rejection. A GID font in a logo elsewhere on the page
// shouldn't force GPU OCR for clean text regions.
let needs_ocr = text.trim().is_empty()
|| page_has_gid
|| is_garbage_text(&text)
|| is_cid_garbage(&text)
|| detect_encoding_issues(&text);
@@ -504,7 +506,7 @@ pub fn extract_tables_in_regions_mem(
let page_1idx = page_0idx + 1;
let items = items_by_page.get(&page_1idx);
let page_h = page_heights.get(&page_1idx).copied().unwrap_or(792.0);
let page_has_gid = gid_pages.contains(&page_1idx);
let _page_has_gid = gid_pages.contains(&page_1idx);
let coords = if rotated_pages.contains(&page_1idx) {
RegionCoordSpace::Rotated90Ccw
} else {
@@ -516,14 +518,14 @@ pub fn extract_tables_in_regions_mem(
for rect in regions {
let [rx1, ry1, rx2, ry2] = *rect;
// If page has GID font issues, bail early
if page_has_gid {
page_results.push(RegionText {
text: String::new(),
needs_ocr: true,
});
continue;
}
// Note: we intentionally DO NOT bail on page_has_gid here.
// The GID flag means some font on the page uses unresolvable
// glyph IDs, but that font may only appear in a logo or
// header — not in the table region. Instead we let the
// per-region text quality checks (is_garbage_text, is_cid_garbage,
// detect_encoding_issues) reject based on the actual extracted
// content. This avoids rejecting clean tables just because an
// unrelated decorative font on the same page is GID-encoded.
let matched: Vec<TextItem> = match items {
Some(items) => {
@@ -577,10 +579,12 @@ pub fn extract_tables_in_regions_mem(
// mis-detected (numeric "header", empty header cells,
// duplicate header cells). Caught GLM-OCR-as-baseline
// scoring 0 TEDS on real prod tables in eval.
// Layout model already identified this region as a table,
// so use relaxed partial-table checks (layout_assisted=true).
let needs_ocr = is_garbage_text(&md)
|| is_cid_garbage(&md)
|| detect_encoding_issues(&md)
|| looks_like_partial_table(&md);
|| looks_like_partial_table_ex(&md, true);
page_results.push(RegionText {
text: if needs_ocr { String::new() } else { md },
needs_ocr,
@@ -1220,7 +1224,14 @@ fn is_cid_garbage(text: &str) -> bool {
///
/// Conservative by design: a few false positives (perfectly fine tables flagged)
/// just mean we run GPU OCR which is the existing safe path.
fn looks_like_partial_table(markdown: &str) -> bool {
/// When `layout_assisted` is true (the layout model identified this region
/// as a table), we relax boundary-detection heuristics (numeric header,
/// empty header cells, sparse first data row) because the layout model
/// already gave us the table bbox — we're not guessing "is this a table?"
/// anymore, only "can we extract it correctly?". Paragraph and duplicate-
/// header checks stay, since those indicate genuine extraction quality
/// issues regardless of how the region was identified.
fn looks_like_partial_table_ex(markdown: &str, layout_assisted: bool) -> bool {
let lines: Vec<&str> = markdown.lines().filter(|l| l.starts_with('|')).collect();
if lines.len() < 2 {
return false;
@@ -1252,17 +1263,28 @@ fn looks_like_partial_table(markdown: &str) -> bool {
}
// Failure mode 1: header starts with a bare number (likely we missed
// the real header row above)
if let Some(first) = header_cells.first() {
let trimmed = first.trim();
if !trimmed.is_empty() && trimmed.chars().all(|c| c.is_ascii_digit()) {
return true;
// the real header row above). Skip when layout-assisted — the layout
// model's bbox includes the real header; a numeric first cell (e.g.,
// a year "2024") is legitimate.
if !layout_assisted {
if let Some(first) = header_cells.first() {
let trimmed = first.trim();
if !trimmed.is_empty() && trimmed.chars().all(|c| c.is_ascii_digit()) {
return true;
}
}
}
// Failure mode 2: header has empty cells in a multi-column table
// Failure mode 2: header has empty cells in a multi-column table.
// When layout-assisted, allow up to 1 empty header cell (common in
// tables with merged/spanning header cells that we can't represent).
let empty_count = header_cells.iter().filter(|c| c.is_empty()).count();
if n_cols >= 3 && empty_count >= 1 {
if layout_assisted {
// Reject only if >1 empty header cell (2+ means serious boundary issue)
if n_cols >= 3 && empty_count >= 2 {
return true;
}
} else if n_cols >= 3 && empty_count >= 1 {
return true;
}
@@ -1290,9 +1312,13 @@ fn looks_like_partial_table(markdown: &str) -> bool {
if data_cells.len() >= 3 {
let data_inner = &data_cells[1..data_cells.len() - 1];
let empty_data = data_inner.iter().filter(|c| c.is_empty()).count();
// ≥3 cols, and a third or more of cells in the first data row
// are empty → very likely we mis-split a multi-row header.
if n_cols >= 3 && empty_data * 3 >= n_cols {
// ≥3 cols, and significant portion of cells in the first data
// row are empty → likely we mis-split a multi-row header.
// When layout-assisted, relax from 33% to 50% — the bbox is
// more reliable, and real tables with one sparse first row
// (totals, subtotals) are common.
let threshold = if layout_assisted { 2 } else { 3 };
if n_cols >= 3 && empty_data * threshold >= n_cols {
return true;
}
}
@@ -1351,9 +1377,16 @@ fn looks_like_partial_table(markdown: &str) -> bool {
false
}
/// Original strict validation (no layout assistance). Used by tests and
/// full-page extraction paths that don't have layout model assistance.
#[cfg(test)]
fn looks_like_partial_table(markdown: &str) -> bool {
looks_like_partial_table_ex(markdown, false)
}
#[cfg(test)]
mod looks_like_partial_table_tests {
use super::looks_like_partial_table;
use super::{looks_like_partial_table, looks_like_partial_table_ex};
#[test]
fn good_table_passes() {
@@ -1455,6 +1488,93 @@ mod looks_like_partial_table_tests {
|Spain|Madrid|Largest city in Spain|";
assert!(!looks_like_partial_table(md));
}
// --- layout_assisted relaxation tests ---
#[test]
fn numeric_header_accepted_when_layout_assisted() {
// Year as first header cell is valid when layout model gave us the bbox.
let md = "|2024|Revenue|Growth|\n|---|---|---|\n|Q1|1.2M|5%|\n|Q2|1.4M|8%|";
assert!(
looks_like_partial_table(md),
"strict mode rejects numeric header"
);
assert!(
!looks_like_partial_table_ex(md, true),
"layout-assisted should accept"
);
}
#[test]
fn one_empty_header_accepted_when_layout_assisted() {
// Common in merged-header tables: one spanning cell leaves a gap.
let md = "|Position||Senate|House|\n|---|---|---|---|\n|Chair|1|2|3|\n|Vice|4|5|6|";
assert!(
looks_like_partial_table(md),
"strict rejects 1 empty header"
);
assert!(
!looks_like_partial_table_ex(md, true),
"layout-assisted allows 1 empty"
);
}
#[test]
fn two_empty_headers_still_rejected_when_layout_assisted() {
// 2+ empty headers is still bad even with layout assistance.
let md = "|A|||D|\n|---|---|---|---|\n|x|y|z|w|";
assert!(
looks_like_partial_table_ex(md, true),
"2 empty headers rejected even layout-assisted"
);
}
#[test]
fn sparse_first_row_relaxed_when_layout_assisted() {
// 1/4 empty = 25%, below strict 33% threshold but accepted by layout-assisted 50%.
let md = "|A|B|C|D|\n|---|---|---|---|\n|x||y|z|\n|p|q|r|s|";
assert!(!looks_like_partial_table(md), "strict: 25% empty is OK");
// 2/4 = 50%, strict would flag (2*3>=4), relaxed threshold (2*2>=4) would also flag.
let md2 = "|A|B|C|D|\n|---|---|---|---|\n|||y|z|\n|p|q|r|s|";
assert!(looks_like_partial_table(md2), "strict: 50% empty flagged");
assert!(
looks_like_partial_table_ex(md2, true),
"layout-assisted: 50% also flagged"
);
// 2/6 = 33%, strict flags (2*3>=6), relaxed does not (2*2<6)
let md3 = "|A|B|C|D|E|F|\n|---|---|---|---|---|---|\n|x|||y|z|w|\n|a|b|c|d|e|f|";
assert!(looks_like_partial_table(md3), "strict: 33% flagged");
assert!(
!looks_like_partial_table_ex(md3, true),
"layout-assisted: 33% accepted"
);
}
#[test]
fn paragraph_still_rejected_when_layout_assisted() {
// Paragraph detection is not relaxed — it's a genuine extraction issue.
let md = "|Approval is needed from the|Acquisitions of|\n\
|---|---|\n\
|Treasurer if the acquisition|residential and|\n\
|constitutes a \"significant|agricultural|\n\
|action,\" including acquiring an|land by foreign|\n\
|interest in different types of|persons must be|\n\
|land where the monetary|reported to the|";
assert!(
looks_like_partial_table_ex(md, true),
"paragraph rejection stays strict"
);
}
#[test]
fn duplicate_headers_still_rejected_when_layout_assisted() {
let md =
"|Position|Administration|Administration|Notes|\n|---|---|---|---|\n|Senate|24|16|x|";
assert!(
looks_like_partial_table_ex(md, true),
"duplicate headers rejected even layout-assisted"
);
}
}
/// Analyse extracted items and rects for layout complexity.