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

Latest Version

Version
1.0.5
Update
November 23, 2020
Size
23.34KiB
Developer
Category
Users
83
Rating
5 ★
Manifest Version
2
Web Store Status
Languages Support
English
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Permissions
DesktopCapture
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Mappertje Extension

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.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "Mappertje", "version": "1.0.5", "manifest_version": 2, "description": "Projection mapping: correct perspective & crop a source (camera or screen) to map it onto a rectangular surface with corner pinning.", "icons": { "16": "icons/icon16.png", "48": "icons/icon48.png", "128": "icons/icon128.png" }, "browser_action": { "default_popup": "index.html" }, "permissions": ["desktopCapture"], "web_accessible_resources": ["modules/mapper/*", "icons/*"]}
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How to download and manually install Mappertje extension for Chrome

Looking for a way to install Mappertje extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Mappertje extensions manually, this article outlines two simple methods to effortlessly install Mappertje extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Mappertje extension and manually install through Drag &Drop

If you ever need to manually install a Mappertje extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Mappertje Extension by clicking the "Download CRX" button on the website.

Look for the Mappertje extension you wish to install. Go to the website and download the Mappertje extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Mappertje extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Mappertje extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Mappertje extension for Chrome and install in Developer Mode

This is another method to install Mappertje extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Mappertje extension file

Select and download the Mappertje extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Mappertje extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Mappertje extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Mappertje extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Mappertje extension in 2 ways. We hope this guide proves helpful.

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