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QRCode-decode
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v0.0.1 ... master

Author SHA1 Message Date
cnwhy 14edfc7fbb v0.0.3 use jsqr 7 years ago
cnwhy 2e142c20e8 v0.0.2 7 years ago
cnwhy a98b9e1129 bugfix 7 years ago
19 changed files with 216 additions and 6429 deletions
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0
.nojekyll
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5
browser.js
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@ -3,8 +3,9 @@ var qrDecode = require('./src/QRDecode');
var decodeByDom = function (dom) { var decodeByDom = function (dom) {
var canvas = document.createElement("canvas") var canvas = document.createElement("canvas")
var ctx = canvas.getContext('2d') var ctx = canvas.getContext('2d')
canvas.width = dom.width; var isVideo = dom.tagName == 'VIDEO'
canvas.height = dom.height; canvas.width = isVideo ? dom.videoWidth : dom.width;
canvas.height = isVideo ? dom.videoHeight : dom.height;
ctx.drawImage(dom, 0, 0, canvas.width, canvas.height); ctx.drawImage(dom, 0, 0, canvas.width, canvas.height);
var data = ctx.getImageData(0, 0, canvas.width, canvas.height); var data = ctx.getImageData(0, 0, canvas.width, canvas.height);
return qrDecode(data) return qrDecode(data)

87
demo/index.html
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@ -1,14 +1,97 @@
<!DOCTYPE html> <!DOCTYPE html>
<html lang="en"> <html lang="en">
<head> <head>
<meta charset="UTF-8"> <meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge"> <meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>qrcode-decode</title> <title>qrcode-decode</title>
</head> </head>
<body> <body>
<input type="file" name="file" id="file"><br> <input type="file" name="file" id="file">
<br>
<button id="videoBut" onclick="buttonClick()">启用摄像头</button><br>
<video id="video" width="300"></video>
<div></div> <div></div>
</body> </body>
<script type="text/javascript" src="test.js"></script> <script type="text/javascript" src="../dist/qr-decode.js"></script>
<script>
document.getElementById('file').onchange = function (event) {
var el = event.target;
if (!el.files.length) return;
var file = el.files[0];
new Promise(function (ok, no) {
if (window.URL && window.URL.createObjectURL) {
ok(window.URL.createObjectURL(file));
} else if (typeof FileReader) {
var reader = new FileReader();
reader.onload = evt => {
ok(evt.target.result);
};
reader.readAsDataURL(file);
} else {
no('浏览器不支持');
}
}).then((src) => {
qrDecode.decodeByUrl(src, function (err, txt) {
var msg = document.createElement("div")
if (err) {
console.log(err);
msg.innerHTML = "err: <br>" + err;
} else {
msg.innerHTML = txt;
}
document.body.appendChild(msg);
})
});
}
var video =document.getElementById('video');
var videoBut =document.getElementById('videoBut');
var xc;
videoBut.onclick = videoEnable;
function videoEnable() {
var URL = window.URL || window.webkitURL;
navigator.getUserMedia({
video: true
}, function (stream) {
video.src = URL.createObjectURL(stream);// 将获取到的视频流对象转换为地址
video.oncanplay = function(){
videoPlay();
video.width = video.videoWidth;
video.height = video.videoHeight;
}
}, function (error) {
alert(error.name || error);
});
}
function videoStop(){
clearInterval(xc);
video.pause();
videoBut.innerText = '启动';
videoBut.onclick = videoPlay;
}
function videoPlay(){
video.play();
videoBut.innerText = '停止';
xc = setInterval(function(){
try{
var txt = qrDecode.decodeByDom(video);
var msg = document.createElement("div")
msg.innerHTML = "识别到二维码: " + txt;
document.body.appendChild(msg);
videoStop();
}catch(err){
console.log(err);
}
},300)
videoBut.onclick = videoStop;
}
</script>
</html> </html>

32
demo/test.js
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@ -1,32 +0,0 @@
var qrcodeDecode = require('../browser')
document.getElementById('file').onchange = function (event) {
var el = event.target;
if (!el.files.length) return;
var file = el.files[0];
new Promise(function (ok, no) {
if (window.URL && window.URL.createObjectURL) {
ok(window.URL.createObjectURL(file));
} else if (typeof FileReader) {
var reader = new FileReader();
reader.onload = evt => {
ok(evt.target.result);
};
reader.readAsDataURL(file);
} else {
no('浏览器不支持');
}
}).then((src) => {
qrcodeDecode.decodeByUrl(src, function (err, txt) {
var msg = document.createElement("div")
if (err) {
console.log(err);
msg.innerHTML = "err: <br>" + err;
} else {
msg.innerHTML = txt;
}
document.body.appendChild(msg);
})
});
}

14
dist/index.html vendored
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@ -1,14 +0,0 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>qrcode-decode</title>
</head>
<body>
<input type="file" name="file" id="file"><br>
<div></div>
</body>
<script type="text/javascript" src="/test.b0eca09c.js"></script>
</html>

119
dist/qr-decode.js vendored
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@ -1,13 +1,13 @@
/*! /*!
* qr-decode v0.0.1 * qr-decode v0.0.3
* (c) 2018-present cnwhy <w.why@163.com> * (c) 2018-present cnwhy <w.why@163.com>
* Released under the ISC License. * Released under the ISC License.
*/ */
(function (global, factory) { (function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(['exports'], factory) : typeof define === 'function' && define.amd ? define(factory) :
(factory((global.qrDecode = {}))); (global.qrDecode = factory());
}(this, (function (exports) { 'use strict'; }(this, (function () { 'use strict';
function AlignmentPattern(posX, posY, estimatedModuleSize) { function AlignmentPattern(posX, posY, estimatedModuleSize) {
this.x = posX; this.x = posX;
@ -847,8 +847,87 @@
if (number >= 0) return number >> bits;else return (number >> bits) + (2 << ~bits); if (number >= 0) return number >> bits;else return (number >> bits) + (2 << ~bits);
}; };
var ObjDP = Object.defineProperty;
function addAttr(obj, prop, value) {
ObjDP(obj, prop, {
configurable: true,
value: value
});
}
var Matrix = {
getPoint: function getPoint(x, y) {
return this[this.width * y + x];
},
setPoint: function setPoint(x, y, v) {
return this[this.width * y + x] = v;
},
getRow: function getRow(y) {
var start = this.width * y;
return this.slice(start, start + this.width);
},
getColumn: function getColumn(x) {
var col = [];
var y = 0;
while (y + x < this.length) {
col.push(this[y + x]);
y += this.width;
}
return col;
},
getHeight: function getHeight() {
return Math.ceil(this.length / width);
}
};
var extendArray2Matrix_1 = function (arr, width) {
addAttr(arr, 'width', width);
ObjDP(arr, 'height', {
get: Matrix.getHeight
});
addAttr(arr, 'get', Matrix.getPoint);
addAttr(arr, 'set', Matrix.setPoint);
addAttr(arr, 'getRow', Matrix.getRow);
addAttr(arr, 'getColumn', Matrix.getColumn);
return arr;
};
/**
* imageData对像转灰度矩阵
* @param {object} imageData
*/
var imageData2greyMatrix = function (imageData) {
var data = imageData.data,
width = imageData.width,
height = imageData.height;
var greyscalePixels = [];
for (var x = 0; x < width; x++) {
for (var y = 0; y < height; y++) {
var p = (y * width + x) * 4;
var r = data[p + 0];
var g = data[p + 1];
var b = data[p + 2];
var a = data[p + 3];
greyscalePixels.push((r * 0.2126 + g * 0.7152 + b * 0.0722) * a / 255);
}
extendArray2Matrix(greyscalePixels);
return greyscalePixels;
}
};
var Matrix2bitMatrix = function (Matrix) {}; //exports.getPointAtMatrix
var utils = { var utils = {
URShift: URShift URShift: URShift,
extendArray2Matrix: extendArray2Matrix_1,
imageData2greyMatrix: imageData2greyMatrix,
Matrix2bitMatrix: Matrix2bitMatrix
}; };
function ErrorCorrectionLevel(ordinal, bits, name) { function ErrorCorrectionLevel(ordinal, bits, name) {
@ -965,7 +1044,7 @@
var URShift$2 = utils.URShift; var URShift$2 = utils.URShift;
function BitMatrix(width, height) { function BitMatrix$1(width, height) {
if (!height) height = width; if (!height) height = width;
if (width < 1 || height < 1) { if (width < 1 || height < 1) {
@ -1052,7 +1131,7 @@
}; };
} }
var BitMatix = BitMatrix; var BitMatix = BitMatrix$1;
function ECB(count, dataCodewords) { function ECB(count, dataCodewords) {
this.count = count; this.count = count;
@ -2891,8 +2970,10 @@
Decoder.decode = function (bits) { Decoder.decode = function (bits) {
var parser = new BitMatrixParser(bits); var parser = new BitMatrixParser(bits);
var version = parser.readVersion(); var version = parser.readVersion(); //版本信息
var ecLevel = parser.readFormatInformation().ErrorCorrectionLevel; // Read codewords
var ecLevel = parser.readFormatInformation().ErrorCorrectionLevel; //格式信息
// Read codewords
var codewords = parser.readCodewords(); // Separate into data blocks var codewords = parser.readCodewords(); // Separate into data blocks
@ -2925,7 +3006,12 @@
var Decoder_1 = Decoder; var Decoder_1 = Decoder;
var debug = false; // 获取指定位置的灰度 var debug = false;
/**
* 返回获取指定位置的灰度的函数
* @param {ImageData} data
* @param {Object} base 一个有width,height信息
*/
var Pixel = function Pixel(data, base) { var Pixel = function Pixel(data, base) {
return function (x, y) { return function (x, y) {
@ -2940,7 +3026,7 @@
var binarize = function binarize(data, base, th) { var binarize = function binarize(data, base, th) {
var ret = new Array(base.width * base.height); var ret = new Array(base.width * base.height);
var getPixel = Pixel(data, base); var getPixel = Pixel(data, base); //
for (var y = 0; y < base.height; y++) { for (var y = 0; y < base.height; y++) {
for (var x = 0; x < base.width; x++) { for (var x = 0; x < base.width; x++) {
@ -3007,8 +3093,9 @@
var decodeByDom = function decodeByDom(dom) { var decodeByDom = function decodeByDom(dom) {
var canvas = document.createElement("canvas"); var canvas = document.createElement("canvas");
var ctx = canvas.getContext('2d'); var ctx = canvas.getContext('2d');
canvas.width = dom.width; var isVideo = dom.tagName == 'VIDEO';
canvas.height = dom.height; canvas.width = isVideo ? dom.videoWidth : dom.width;
canvas.height = isVideo ? dom.videoHeight : dom.height;
ctx.drawImage(dom, 0, 0, canvas.width, canvas.height); ctx.drawImage(dom, 0, 0, canvas.width, canvas.height);
var data = ctx.getImageData(0, 0, canvas.width, canvas.height); var data = ctx.getImageData(0, 0, canvas.width, canvas.height);
return QRDecode(data); return QRDecode(data);
@ -3034,8 +3121,6 @@
QRDecode.decodeByUrl = decodeByUrl; QRDecode.decodeByUrl = decodeByUrl;
var browser = QRDecode; var browser = QRDecode;
exports.default = browser; return browser;
Object.defineProperty(exports, '__esModule', { value: true });
}))); })));

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dist/qr-decode.min.js vendored
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dist/qr-decode.min.js.map vendored
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dist/qrcode-decode.js vendored
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dist/qrcode-decode.min.js vendored
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dist/qrcode-decode.min.js.map vendored
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dist/test.b0eca09c.js vendored
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dist/test.b0eca09c.map vendored
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index.html
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@ -0,0 +1,6 @@
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="refresh" content="0;url=./demo/" />
</head>
</html>

5
package.json
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@ -1,6 +1,6 @@
{ {
"name": "qr-decode", "name": "qr-decode",
"version": "0.0.1", "version": "0.0.3",
"description": "QRCode parser/decode", "description": "QRCode parser/decode",
"main": "src/QRCodeDecode.js", "main": "src/QRCodeDecode.js",
"files": [ "files": [
@ -13,7 +13,7 @@
"scripts": { "scripts": {
"test": "node test/node.js", "test": "node test/node.js",
"demo": "parcel ./demo/index.html", "demo": "parcel ./demo/index.html",
"build": "bili browser.js --format umd,umd-min --banner --exports named" "build": "bili browser.js --format umd,umd-min --banner"
}, },
"repository": { "repository": {
"type": "git", "type": "git",
@ -40,6 +40,7 @@
"dependencies": { "dependencies": {
"bmp-js": "^0.1.0", "bmp-js": "^0.1.0",
"image-type": "^3.0.0", "image-type": "^3.0.0",
"jsqr": "^1.1.1",
"pako": "^1.0.6" "pako": "^1.0.6"
} }
} }

2
server.js
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@ -1,7 +1,7 @@
var fs = require('fs') var fs = require('fs')
var imgType = require('image-type') var imgType = require('image-type')
var imgDecode = require('./src/imageDecode') var imgDecode = require('./src/imageDecode')
var qrDecode = require('./src/QRDecode') var qrDecode = require('./src/')
/** /**
* 通过Buffer识别二维码 * 通过Buffer识别二维码

8
src/QRDecode.js
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@ -3,7 +3,11 @@ var Decoder = require('./lib/Decoder');
var debug = false; var debug = false;
// 获取指定位置的灰度 /**
* 返回获取指定位置的灰度的函数
* @param {ImageData} data
* @param {Object} base 一个有width,height信息
*/
var Pixel = function (data,base) { var Pixel = function (data,base) {
return function(x,y){ return function(x,y){
if (base.width < x || base.height < y) { if (base.width < x || base.height < y) {
@ -16,7 +20,7 @@ var Pixel = function (data,base) {
var binarize = function(data,base,th){ var binarize = function(data,base,th){
var ret = new Array(base.width * base.height); var ret = new Array(base.width * base.height);
var getPixel = Pixel(data,base); var getPixel = Pixel(data,base); //
for (var y = 0; y < base.height; y++) { for (var y = 0; y < base.height; y++) {
for (var x = 0; x < base.width; x++) { for (var x = 0; x < base.width; x++) {
var gray = getPixel(x, y); var gray = getPixel(x, y);

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src/index.js
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@ -0,0 +1,4 @@
var jsqr = require('jsqr');
module.exports = function(imageData){
return jsqr(imageData.data,imageData.width,imageData.height).data;
}

4
src/lib/Decoder.js
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@ -32,8 +32,8 @@ Decoder.correctErrors = function (codewordBytes, numDataCodewords) {
Decoder.decode = function (bits) { Decoder.decode = function (bits) {
var parser = new BitMatrixParser(bits); var parser = new BitMatrixParser(bits);
var version = parser.readVersion(); var version = parser.readVersion(); //版本信息
var ecLevel = parser.readFormatInformation().ErrorCorrectionLevel; var ecLevel = parser.readFormatInformation().ErrorCorrectionLevel; //格式信息
// Read codewords // Read codewords
var codewords = parser.readCodewords(); var codewords = parser.readCodewords();

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