将图像传递给ajax中的数据对象

// 将图像转换为Base64编码字符串
function imageToBase64(imageUrl, callback) {
  var canvas = document.createElement('canvas');
  var ctx = canvas.getContext('2d');
  var img = new Image();
  img.crossOrigin = 'Anonymous';

  img.onload = function() {
    canvas.width = img.width;
    canvas.height = img.height;
    ctx.drawImage(img, 0, 0);
    var base64 = canvas.toDataURL('image/png');
    callback(base64);
  };

  img.src = imageUrl;
}

// 发送Ajax请求
function sendAjaxRequest(imageUrl) {
  imageToBase64(imageUrl, function(base64) {
    var data = {
      image: base64
    };

    $.ajax({
      url: 'your_server_url',
      type: 'POST',
      data: data,
      success: function(response) {
        // 处理服务器返回的响应数据
      },
      error: function(xhr, status, error) {
        // 处理请求错误
      }
    });
  });
}

// 调用函数发送Ajax请求
sendAjaxRequest('your_image_url');