用canvas建立圖片

// 建立canvas DOM元素，並設置其寬高和圖片同樣   
    var canvas = document.createElement("canvas");  
    canvas.width = image.width;  
    canvas.height = image.height;  
    // 座標(0,0) 表示今後處開始繪製，至關於偏移。  
    canvas.getContext("2d").drawImage(image, 0, 0);  
	console.log(canvas);
	image.src =canvas.toDataURL();
	//var imageSrc=canvas.toDataURL("image/png");

繪製和模仿圖片

問題1：Tainted canvases may not be exported. ORS與Canvas圖片toDataURL https://www.web-tinker.com/article/20687.html