---
title: "How to inspect envelopes and mailers with computer vision"
description: "Cameras on the converting line look at each envelope or mailer as it is folded, glued and printed, and flag crooked folds, missing or smeared glue, open seams, torn or skewed windows, peel strips out of place and print that is off or smudged for a person to check. Each flag is saved with a photo and the job and time, so a drift in the folder, gluer or press shows up sooner. A line lead decides what is pulled, and the usual size, seal and count checks stay in place."
url: https://lidvizion.ai/answers/how-to-inspect-envelopes-and-mailers-with-computer-vision/
site: Lid Vizion
index: https://lidvizion.ai/llms.txt
---

[Direct answers](https://lidvizion.ai/answers/)

# How can an envelope or mailer maker use computer vision to inspect products on the line?

Cameras on the converting line look at each envelope or mailer as it is folded, glued and printed, and flag crooked folds, missing or smeared glue, open seams, torn or skewed windows, peel strips out of place and print that is off or smudged for a person to check. Each flag is saved with a photo and the job and time, so a drift in the folder, gluer or press shows up sooner. A line lead decides what is pulled, and the usual size, seal and count checks stay in place.

## What this means in practice

- Cameras and even light over the line take pictures of each envelope or mailer after folding, gluing, window patching and printing.
- The model is trained on the clients own products and jobs. It flags crooked or loose folds, missing, extra or smeared glue, open side seams, torn, wrinkled or skewed window film, peel strips that are missing or out of place, and print that is off position, faded or smudged.
- Each flag is saved with a photo, the job, the machine and the time, so the team can see when the folder, gluer, window patcher or press 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 machine and one job type, compare the camera flags with what the crew finds for a few weeks, and keep the existing size, seal, count and customer checks 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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