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Visual Inspector Skill

Render compiled LaTeX PDF pages into high-resolution images with a JSON report.

334|18|Updated Mar 9, 2026
Search Tags:#latex#visual QA#dpi#layout verification#pdf rendering#page images#crop regions
One-click install
npx skills add https://github.com/OpenRaiser/PaperFit --skill visual-inspector-skill
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Visual Inspector Skill
Source: https://github.com/OpenRaiser/PaperFit/tree/main/skills/visual-inspector
Command: npx skills add https://github.com/OpenRaiser/PaperFit --skill visual-inspector-skill

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes assets (resource) components.

What problem does it solve?

It solves the difficulty of validating LaTeX layout quality using only compilation logs, by generating per-page visual evidence that downstream agents can use to catch real-world typesetting defects.

Core Features & Use Cases

  • PDF page rendering for visual evidence: Converts a compiled PDF into high-resolution page images (PNG/JPG) with consistent naming.
  • Optional cropped region rendering: Produces targeted, high-DPI crops for tables, formulas, and other small elements when deeper visual inspection is needed.
  • Structured rendering results: Outputs a JSON render report including page counts, image dimensions, and any errors to drive deterministic verification loops.

Use it after each successful LaTeX compile to enable visual diagnosis (e.g., detecting double-column voids, overflow, missing figures/tables) and to compare before/after fixes.

Quick Start

Ask your agent to render the compiled PDF pages (for example main.pdf) into data/pages at 220 DPI and produce the corresponding render report for visual inspection.

Frequently Asked Questions about Visual Inspector Skill

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I render a LaTeX PDF into page images for visual layout verification?▼

To render a LaTeX PDF into page images for visual layout verification, provide the compiled PDF path and output directory, then specify DPI and page-range parameters to generate high-resolution PNG or JPG files.

Can I crop specific regions of a PDF page for high-DPI visual inspection?▼

Yes, you can crop specific regions of a PDF page for high-DPI visual inspection by using the optional cropped region rendering feature to target tables, formulas, and other small layout elements.

What is the best way to validate LaTeX typesetting defects beyond compilation logs?▼

The best way to validate LaTeX typesetting defects beyond compilation logs is generating per-page visual evidence from the compiled PDF to manually detect double-column voids, overflow, or missing figures.

Does this visual QA tool work with standard academic LaTeX templates?▼

Yes, this visual QA tool works with standard academic LaTeX templates and typical page layouts, applying after successful compilation to enable before and after repair validation across various document structures.

Do I need Poppler or pdf2image to run the PDF rendering pipeline?▼

You need Poppler or pdf2image to run the PDF rendering pipeline, as the tool uses these libraries or the PaperFit CLI pipeline to convert compiled PDF documents into high-resolution page images.

What details are included in the JSON report after rendering PDF page images?▼

The JSON report after rendering PDF page images includes the rendering status, page counts, image dimensions, and any error details to drive deterministic visual verification loops.

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