def generate_pivot_list_fast(p_score,
                             p_char_maps,
                             f_direction,
                             Lexicon_Table,
                             score_thresh=0.5):
    """
    return center point and end point of TCL instance; filter with the char maps;
    """
    p_score = p_score[0]
    f_direction = f_direction.transpose(1, 2, 0)
    p_tcl_map = (p_score > score_thresh) * 1.0
    skeleton_map = thin(p_tcl_map.astype(np.uint8))
    instance_count, instance_label_map = cv2.connectedComponents(
        skeleton_map.astype(np.uint8), connectivity=8)

    # get TCL Instance
    all_pos_yxs = []
    if instance_count > 0:
        for instance_id in range(1, instance_count):
            pos_list = []
            ys, xs = np.where(instance_label_map == instance_id)
            pos_list = list(zip(ys, xs))

            if len(pos_list) < 3:
                continue

            pos_list_sorted = sort_and_expand_with_direction_v2(
                pos_list, f_direction, p_tcl_map)
            all_pos_yxs.append(pos_list_sorted)

    p_char_maps = p_char_maps.transpose([1, 2, 0])
    decoded_str, keep_yxs_list = ctc_decoder_for_image(
        all_pos_yxs, logits_map=p_char_maps, Lexicon_Table=Lexicon_Table)
    return keep_yxs_list, decoded_str
return center point and end point of TCL instance; filter with the char maps;
pytorchocr/utils/e2e_utils/extract_textpoint_fast.py