Document Layout Inspector — Visualize OCR Complexity

Overlays 0/4

Connected components Canny edges Contours Text density heatmap

Canny low threshold 50

Canny high threshold 150

Minimum region area 50

Region count—

Layout entropy—

Column confidence—

OCR difficulty—

Edge density—

Click a region on the document to inspect its bounding box, area, pixel density, and classification.

Click and drag on the document to draw a box for ground-truth comparison against auto-detected regions.