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opencv-wasm
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Precompiled OpenCV 4.3.0 to JavaScript + WebAssembly for node.js environment.
In this WASM compiled OpenCV, there's no need to have OpenCV installed in the machine or using node-gyp. The entire OpenCV is already inside this package (opencv.js and opencv.wasm).
This compiled OpenCV has been tested with the testing tool from OpenCV with the result as follows:
Test result with node v12.16.2 LTS
Global summary:
┌───────┬───────┬────────────┬────────┬────────┬─────────┐
│ Files │ Tests │ Assertions │ Failed │ Passed │ Runtime │
├───────┼───────┼────────────┼────────┼────────┼─────────┤
│ 1 │ 31 │ 547 │ 0 │ 547 │ 1070 │
└───────┴───────┴────────────┴────────┴────────┴─────────┘
0 failed, 547 passed
npm install opencv-wasm
Because this module is using (almost) the same code as the official OpenCV.js for the web, you can use the same documentation at the web: https://docs.opencv.org/3.4/d5/d10/tutorial_js_root.html
There are some minor initialization changes, because this module will be loaded synchronously instead of the OpenCV's default (asynchronously).
You can check the files inside examples folder as reference on how to initialize, loading images, and saving images.
By default, mistakes in code will produce error code. You can use the following snippet to translate the error code into meaningful statement from OpenCV.
const { cv, cvTranslateError } = require('../');
try {
// Your OpenCV
} catch (err) {
console.log(cvTranslateError(cv, err));
}
This npm module uses the following versioning number:
<opencv version>-<this module version>
For Example
4.3.0-1.0.0
OpenCV version 4.3.0
OpenCV-WASM Module version 1.0.0
See also the list of contributors who participated in this project.
Code and documentation copyright 2019 the OpenCV-WASM Project Authors.
OpenCV-WASM code is licensed under BSD-3-Clause. Images, logos, docs, and articles in this OpenCV-WASM project are released under CC-BY-SA-4.0.
Libraries, dependencies, and tools used in this project are tied with their own licenses respectively.
FAQs
Precompiled OpenCV 4.3.0 to JavaScript + WebAssembly for node.js environment
We found that opencv-wasm demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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