How can a pen or marker maker use computer vision to inspect products on the assembly line?

---
title: "How to inspect pens and markers with computer vision"
description: "Cameras on the assembly line look at each pen, marker or pencil and flag missing or loose caps and clips, cracked barrels, wrong cap colors, crooked or smudged print, missing tips and short ink fills for a person to check. Each flag is saved with a photo and the line and batch, so repeat problems point back to a mold, printer or filler. A line lead decides what is pulled, and the usual write, ink and cap tests stay in place."
url: https://lidvizion.ai/answers/how-to-inspect-pens-and-markers-with-computer-vision/
site: Lid Vizion
index: https://lidvizion.ai/llms.txt
---

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# How can a pen or marker maker use computer vision to inspect products on the assembly line?

Cameras on the assembly line look at each pen, marker or pencil and flag missing or loose caps and clips, cracked barrels, wrong cap colors, crooked or smudged print, missing tips and short ink fills for a person to check. Each flag is saved with a photo and the line and batch, so repeat problems point back to a mold, printer or filler. A line lead decides what is pulled, and the usual write, ink and cap tests stay in place.

## What this means in practice

- Cameras and even light over the assembly line take pictures of each pen, marker or pencil after assembly, filling and printing, and of each pack before it is sealed.
- The model is trained on the clients own products and colors. It flags missing or loose caps, clips or plugs, cracked or scratched barrels, caps that do not match the ink color, print that is crooked, faded or smudged, missing or bent tips, ink levels that look short, and packs with a missing or wrong piece.
- Each flag is saved with a photo, the line, the batch and the time, so the team can see when a mold, printer, filler or packer starts to drift.
- A line lead checks the flags and decides what is pulled or reworked. The cameras point at the product, not at workers, and any people caught in view are blurred.
- Start with one line and one product, compare the camera flags with what the crew finds for a few weeks, and keep the existing write, ink, cap and safety tests in place.

## How Lid Vizion approaches it

We start with the business decision and operating context, define ownership and measurable milestones, then use configuration, integrations, automation, or custom software only where each earns its place.

## More on Automation & custom AI

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