v0.0.3 use jsqr

src/QRDecode.js

@@ -3,7 +3,11 @@ var Decoder = require('./lib/Decoder');
 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) {
 	return function(x,y){
 		if (base.width < x || base.height < y) {
@@ -16,7 +20,7 @@ var Pixel = function (data,base) {
 
 var binarize = function(data,base,th){
 	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 x = 0; x < base.width; x++) {
             var gray = getPixel(x, y);

src/index.js

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

src/lib/Decoder.js

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