import cv2
import numpy as np


def stdc_yolo(stdc_det, yolo_det):
    im = np.uint8(stdc_det)
    # ret, thresh = cv2.threshold(im, 0.5, 255, cv2.THRESH_BINARY)
    # contours = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
    if not yolo_det.size:
        return yolo_det

    #
    x_c = ((yolo_det[:, 0] + yolo_det[:, 2]) // 2).astype(int)
    y_c = ((yolo_det[:, 1] + yolo_det[:, 3]) // 2).astype(int)

    yolo_filted = yolo_det[im[y_c, x_c] == 0]

    return yolo_filted