Mappertje

Mappertje

Projection mapping: correct perspective & crop a source (camera or screen) to map it onto a rectangular surface with corner pinning.

What is Mappertje?
Mappertje is a Chrome extension that allows you to correct the perspective and crop a source feed, such as a webcam or screen, to project it onto a rectangular surface using corner pinning. It is perfect for use with a beamer or projector and can be used with other extensions like Pop-out Jitsi Meet.
Merlin
Stats
Users: 89 ▼ -3
Rating: 5.00 (1)
Version: 1.0.5 (Last updated: 2020-11-24)
Creation date: 2020-04-30
Risk impact: Moderate risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
Permissions:
  • desktopCapture
Size: 23.90K
URLs: Website
Stats date:

Chrome-Stats Rank

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Merlin
Summary

This extension is supposed to be used with a beamer/projector, preferably as a second monitor. You can aim the projector at a rectangular area, where you want your source feed to appear.

Use your webcam, your screen or any window open on your desktop as a source. You can correct the source (perspective, rotate, flip) by dragging each corner. Additionally you can crop out a rectangular area in case the source feed contains stuff you don't need.

Mappertje also integrates directly with my other extension: Pop-out Jitsi Meet: https://chrome.google.com/webstore/detail/pop-out-jitsi-meet/boklbbjieahngbnhdmlhldjjibdnnbcn When you've got both extensions installed you can also use all (remote) videos in the Jitsi conference as a source for projection mapping.

User reviews
Yes! Thank You! Will test this tonight with a full movie - projector doesn't have advanced keystone feature. Update - Been watching several streaming services with this utility! Thank you for making a seemingly niche feature a reality! Works brilliantly!
by Eric Ewing Eric Ewing, 2024-04-27
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Safety
Risk impact

Mappertje may not be safe to use and it requires some risky permissions. Exercise caution when installing this extension. Review carefully before installing.

Risk likelihood

Mappertje has earned a good reputation and can be trusted.

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Screenshots
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