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ColonelParrot
e9af1941e6
Update README.md 2025-03-13 23:21:51 -04:00
ColonelParrot
ce85c440ad fix scaling issue for logo 2025-03-13 23:12:58 -04:00
ColonelParrot
3f4b902c48 Bump to v1.4.0 2025-02-18 11:38:31 -05:00
ColonelParrot
1fa3133944 optimize extractPaper by saving compute when cornerPoints supplied 2025-02-18 11:36:46 -05:00
ColonelParrot
58b26c34c7 fix skipped tests with before() 2025-02-18 11:36:12 -05:00
ColonelParrot
b4e68b12c9 Update canvas, jsdom and mocha to resolve audit warnings 2025-02-02 00:09:54 -05:00
7 changed files with 1477 additions and 2145 deletions

131
README.md
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<p align="center">
<img src="docs/images/logo-github.png" height="150">
</p>
<p align="center">
<a href="https://www.jsdelivr.com/package/gh/ColonelParrot/jscanify"><img src="https://data.jsdelivr.com/v1/package/gh/ColonelParrot/jscanify/badge"></a>
<a href="https://cdnjs.com/libraries/jscanify"><img src="https://img.shields.io/cdnjs/v/jscanify"></a>
<a href="https://npmjs.com/package/jscanify"><img src="https://badgen.net/npm/dw/jscanify"></a>
<br />
<a href="https://github.com/puffinsoft/jscanify/blob/master/LICENSE"><img src="https://img.shields.io/github/license/puffinsoft/jscanify.svg"></a>
<a href="https://npmjs.com/package/jscanify"><img src="https://badgen.net/npm/v/jscanify"></a>
</p>
<p align="center">
<a href="https://nodei.co/npm/jscanify/"><img src="https://nodei.co/npm/jscanify.png"></a>
</p>
<p align="center">
Powered with <a href="https://docs.opencv.org/3.4/d5/d10/tutorial_js_root.html">opencv.js</a><br/>
Supports the web, NodeJS, <a href="https://github.com/ColonelParrot/react-scanify-demo">React</a>, and others.
<br/>
Available on <a href="https://www.npmjs.com/package/jscanify">npm</a> or via <a href="https://www.jsdelivr.com/package/gh/ColonelParrot/jscanify">cdn</a><br/>
</p>
**Features**:
- paper detection & highlighting
- paper scanning with distortion correction
> [!IMPORTANT]
> 🎉 _jscanify v1.3.0_ has just been released! **Same API, better results.** See the [release](https://github.com/puffinsoft/jscanify/releases/tag/v1.3.0) to see the difference! 🎉
- 🆕 glare suppression
- 🆕 multi-colored paper support
<hr />
<img src="docs/images/github-explanation-long.png" />
<h3 align="center" margin="0"><a href="https://github.com/puffinsoft/jscanify/wiki">➡️ view documentation</a></h3>
<hr/>
## Quickstart
> **Developers Note**: you can now use the [jscanify debugging tool](https://colonelparrot.github.io/jscanify/tester.html) to observe the result (highlighting, extraction) on test images.
### Import
npm:
```js
$ npm i jscanify
import jscanify from 'jscanify'
```
cdn:
```html
<script src="https://docs.opencv.org/4.7.0/opencv.js" async></script>
<!-- warning: loading OpenCV can take some time. Load asynchronously -->
<script src="https://cdn.jsdelivr.net/gh/ColonelParrot/jscanify@master/src/jscanify.min.js"></script>
```
> **Note**: jscanify on NodeJS is slightly different. See [wiki: use on NodeJS](https://github.com/ColonelParrot/jscanify/wiki#use-on-nodejs).
### Highlight Paper in Image
```html
<img src="/path/to/your/image.png" id="image" />
```
```js
const scanner = new jscanify();
image.onload = function () {
const highlightedCanvas = scanner.highlightPaper(image);
document.body.appendChild(highlightedCanvas);
};
```
### Extract Paper
```js
const scanner = new jscanify();
const paperWidth = 500;
const paperHeight = 1000;
image.onload = function () {
const resultCanvas = scanner.extractPaper(image, paperWidth, paperHeight);
document.body.appendChild(resultCanvas);
};
```
### Highlighting Paper in User Camera
The following code continuously reads from the user's camera and highlights the paper:
```html
<video id="video"></video> <canvas id="canvas"></canvas>
<!-- original video -->
<canvas id="result"></canvas>
<!-- highlighted video -->
```
```js
const scanner = new jscanify();
const canvasCtx = canvas.getContext("2d");
const resultCtx = result.getContext("2d");
navigator.mediaDevices.getUserMedia({ video: true }).then((stream) => {
video.srcObject = stream;
video.onloadedmetadata = () => {
video.play();
setInterval(() => {
canvasCtx.drawImage(video, 0, 0);
const resultCanvas = scanner.highlightPaper(canvas);
resultCtx.drawImage(resultCanvas, 0, 0);
}, 10);
};
});
```
To export the paper to a PDF, see [here](https://stackoverflow.com/questions/23681325/convert-canvas-to-pdf)
### Notes
- for optimal paper detection, the paper should be placed on a flat surface with a solid background color
- we recommend wrapping your code using `jscanify` in a window `load` event listener to ensure OpenCV is loaded
<h3 align="center" margin="0"><a href="https://github.com/puffinsoft/jscanify/wiki">➡️ view documentation</a></h3>
# this repository has been moved to [puffinsoft/jscanify](https://github.com/puffinsoft/jscanify)

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@ -32,7 +32,7 @@
fill="black" class="octo-body"></path>
</svg>
</a>
<img src="images/logo-full.png" alt="jscanify logo" style="height: 100px" />
<img src="images/logo-full.png" alt="jscanify logo" style="width: 375px" />
<h2>the javascript document scanning library.</h2>
<br />
<div class="view-on">

3266
package-lock.json generated

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{
"name": "jscanify",
"version": "1.3.3",
"version": "1.4.0",
"description": "Open-source Javascript mobile document scanner.",
"main": "src/jscanify-node.js",
"directories": {
@ -25,8 +25,8 @@
},
"homepage": "https://colonelparrot.github.io/jscanify/",
"dependencies": {
"canvas": "^2.11.2",
"jsdom": "^22.0.0",
"mocha": "^10.2.0"
"canvas": "^3.1.0",
"jsdom": "^26.0.0",
"mocha": "^11.1.0"
}
}

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@ -1,4 +1,4 @@
/*! jscanify v1.3.3 | (c) ColonelParrot and other contributors | MIT License */
/*! jscanify v1.4.0 | (c) ColonelParrot and other contributors | MIT License */
const { Canvas, createCanvas, Image, ImageData } = require("canvas");
const { JSDOM } = require("jsdom");
@ -153,9 +153,9 @@ class jscanify {
extractPaper(image, resultWidth, resultHeight, cornerPoints) {
const canvas = createCanvas();
const img = cv.imread(image);
const maxContour = this.findPaperContour(img);
const maxContour = cornerPoints ? null : this.findPaperContour(img);
if(maxContour == null){
if(maxContour == null && cornerPoints === undefined){
return null;
}

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@ -1,4 +1,4 @@
/*! jscanify v1.3.3 | (c) ColonelParrot and other contributors | MIT License */
/*! jscanify v1.4.0 | (c) ColonelParrot and other contributors | MIT License */
(function (global, factory) {
typeof exports === "object" && typeof module !== "undefined"
@ -144,9 +144,9 @@
extractPaper(image, resultWidth, resultHeight, cornerPoints) {
const canvas = document.createElement("canvas");
const img = cv.imread(image);
const maxContour = this.findPaperContour(img);
const maxContour = cornerPoints ? null : this.findPaperContour(img);
if(maxContour == null){
if(maxContour == null && cornerPoints === undefined){
return null;
}

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@ -39,21 +39,30 @@ function setup() {
})
}
console.log("=== beginning tests ===");
console.log("loading OpenCV.js...");
let scanner;
let cv;
const scanner = new jscanify();
scanner.loadOpenCV(function (cv) {
before(function (done) {
console.log("=== beginning tests ===");
console.log("loading OpenCV.js...");
scanner = new jscanify();
scanner.loadOpenCV(function (loadedCv) {
cv = loadedCv;
console.log("Finished loading OpenCV.js");
console.log("Writing test images to: " + OUTPUT_FOLDER);
setup()
done();
});
});
/**
/**
* tests an individual image
*/
function test(testImage, imageCount) {
function test(testImage, imageCount) {
describe("image #" + imageCount, function () {
it("should highlight paper", function (done) {
it("should highlight paper", function () {
const highlighted = scanner.highlightPaper(testImage);
const higlightedOutputPath = OUTPUT_FOLDER + "highlighted-" + imageCount + ".jpg";
writeFileSync(
@ -62,10 +71,9 @@ scanner.loadOpenCV(function (cv) {
);
assert.ok(existsSync(higlightedOutputPath));
done();
});
it("should extract paper", function (done) {
it("should extract paper", function () {
const extracted = scanner.extractPaper(testImage, 386, 500);
const extractedOutputPath = OUTPUT_FOLDER + "extracted-" + imageCount + ".jpg";
@ -75,10 +83,9 @@ scanner.loadOpenCV(function (cv) {
);
assert.ok(existsSync(extractedOutputPath));
done();
});
it("should label corner points", function (done) {
it("should label corner points", function () {
const parsedImage = cv.imread(testImage);
const paperContour = scanner.findPaperContour(parsedImage);
const {
@ -111,27 +118,23 @@ scanner.loadOpenCV(function (cv) {
writeFileSync(cornerPointsOutputPath, canvas.toBuffer("image/jpeg"));
assert.ok(existsSync(cornerPointsOutputPath));
done();
});
});
}
}
setup();
let imageCount = 1;
let imageCount = 1;
/*
/*
* go through all images in test image directory
*/
readdirSync(TEST_IMAGE_DIRECTORY).forEach((file) => {
readdirSync(TEST_IMAGE_DIRECTORY).forEach((file) => {
const TEST_IMAGE_PATH = path.join(TEST_IMAGE_DIRECTORY, file);
if(!file.endsWith("-sized.png")){ // these images are for the website, not testing
if (!file.endsWith("-sized.png")) { // these images are for the website, not testing
let tempCount = imageCount++;
loadImage(TEST_IMAGE_PATH).then(function (image) {
test(image, tempCount);
});
}
})
});
})