发布于 2011-03-24 22:06:41
我认为Get image data in JavaScript?回答了你的问题:
// Code taken from MatthewCrumley (https://stackoverflow.com/a/934925/298479)
function getBase64Image(img) {
// Create an empty canvas element
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
// Copy the image contents to the canvas
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
// Get the data-URL formatted image
// Firefox supports PNG and JPEG. You could check img.src to guess the
// original format, but be aware the using "image/jpg" will re-encode the image.
var dataURL = canvas.toDataURL("image/png");
return dataURL.replace(/^data:image\/(png|jpg);base64,/, "");
}
将img
标记传递给此函数。它将返回base64编码的图像。不过,它将被重新编码。因此,您无法访问原始图像数据。
https://stackoverflow.com/questions/5420384
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