Resize any image into a square logo using OpenCV & NumPy!

resize-square-logos.py

import cv2
import numpy as np

logo_name = "original-logo.png"
logo = cv2.imread(logo_name, cv2.IMREAD_UNCHANGED)
assert(logo.any())

h, w, s = logo.shape
if w > h:
    out_img = np.zeros((w, w, s)) 
    yoff = round((w-h)/2)
    out_img[yoff:yoff+h, :w] = logo
else:
    out_img = np.zeros((h, h, s))
    xoff = round((h-w)/2)
    out_img[:h, xoff:xoff+h] = logo

resize_square = 150
if resize_square:
    out_img = cv2.resize(out_img, (resize_square, resize_square), interpolation=cv2.INTER_AREA)

h, w, _ = out_img.shape
cv2.imwrite("{}_{}_{}".format(w, h, logo_name), out_img)