python cv2.findContours sample

# https://www.learning-nao.com/?p=2020

import numpy as numpy

import cv2

def make_list(filepath: str):

    # read

    img = cv2.imread('tmp.bmp', 0)

    # find_contours

    contours, hierarchy = cv2.findContours(img, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)

    # make list

    listx =

    listy =

    for tmp in contours[0]:

        x, y = tmp[0]

        listx.append(x)

        listy.append(y)

    # return

    return listx, listy

if __name__ == '__main__':

    listx, listy = make_list('tmp.bmp')