如何使用ajax请求上传图像

I'm search in the internet for a solution. I find some of them but they didn't work for me. Basically I have an input form on a laravel project where I want to upload an image with ajax request.

On the Get request instead of sending the image is sending the following parameter value [object%20FormData]

I know that I'm doing something wrong but I don't know what it is. Can anyone help me? Here is my Html code

<form class="form-horizontal" id="upload" enctype="multipart/form-data" action="{{{ URL::route('upload') }}}" autocomplete="off" onsubmit="return false">
    <input type="hidden" name="_token" value="{{ csrf_token() }}" />
    <input type="file" name="image" id="image" />
    <button type="button" id="upload_image_btn" class="btn btn-default">Upload!</button>
</form>

And here is my ajax code

var image = $('#image')[0].files[0];
formdata = new FormData();
formdata.append( 'image', image );
formdata.append( 'action', 'image' );

$.ajax({
    type: "GET",
    url: '{{{ URL::route('upload') }}}',
    data: formdata,
    dataType: 'json',
    contentType: false,
    processData: false,
    success: function (data) {
        console.log(data);
    },
    error: function (data) {
        var errors = data.responseJSON;
        $.each(errors, function (key, data) {
            $.each(data, function (index, data) {
                $(".upload_error").text(data);
            })
        })
    }
});

Can anyone help me to find what I'm doing wrong? Thank you

SOLUTION: as the comment says, I changed the GET request of ajax to POST and it work. Thank you for your help