Foreground diff: dark pixels are shared foreground, red is source-PDF-only foreground, and blue is HTML-only foreground.
Color heatmap: white pixels are background or excluded antialiased edges, gray is a close color match, and yellow through dark red indicates increasing perceptual color difference.
passed page-dimensions: Browser page dimensions match the PDF page dimensions.
needs-review text-run-count: The browser DOM contains 152 text runs, but the extracted layout contains 158.
passed word-boundaries: Rendered HTML text preserves word boundaries at the current threshold.
passed text-image-overlap: No text/image overlaps were found in the browser layout.
needs-review text-vector-overlap: 5 text run(s) overlap large rendered vector boxes.
passed visual-foreground-mask: PDF and browser foreground masks match within the current review thresholds after allowing a small renderer/browser rounding delta.
skipped visual-color-difference: Color comparison found too few stable shared-foreground interior pixels for a material page-level assessment.