// Send the drawn image to the server
$('#sendBtn').live('click', function () {
    var cvs = $('#canvas');
    var image = cvs[0].toDataURL("image/png");
    image = image.replace('data:image/png;base64,', '');

    $.ajax({
        type: 'POST',
        url: '/webcam_demo/handle_image/',
        data: '{ "part_picture" : "' + image + '" }',
        contentType: 'application/json; charset=utf-8',
        dataType: 'json',
        success: function (msg) {
            alert('Image sent!');
        }
    });
});