How to solve this captcha? about cbl-js HOT 2 CLOSED

var cbl = new CBL({
    preprocess: function(img) {
        img.debugImage("debugPreprocessed");
        img.binarize(220);
        img.debugImage("debugPreprocessed");
        img.convolute([ [1, 0, 1],
                        [0, 1, 0],
                        [1, 0, 1] ], 1/3);
        img.debugImage("debugPreprocessed");
        img.blur();
        img.debugImage("debugPreprocessed");
        img.binarize(200);
        img.debugImage("debugPreprocessed");
        img.colorRegions(40, true);
        img.debugImage("debugPreprocessed");
    },
    character_set: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
    blob_min_pixels: 50,
    blob_max_pixels: 500,
    pattern_width: 20,
    pattern_height: 20,
    allow_console_log: true,
    blob_debug: "debugSegmented"
});