Draw text on image using PIL or OpenCV. Two complete examples are given.

draw_text_on_img_opencv.py

import cv2

img = cv2.imread("test.jpg")

# OpenCV only support limited font and can only
# draw ASCII characters. If you want to draw non-ASCII
# characters on image, better use PIL
font = cv2.FONT_HERSHEY_PLAIN

# color is in BGR format, so the first component is B, second
# component is G, and the third component is for R.
# Do not get it wrong
color = (0, 0, 255)

# (x, y) are the coordinates where you want to draw text.
# The doc on `putText` is https://goo.gl/sEqDSf
# putText only support ascci characters, all other characters are rendered as box
cv2.putText(img, text="some text", org=(x, y),
            fontFace=font, fontScale=1, color=color, thickness=1)
cv2.imshow("image", img)
cv2.waitKey(0)

draw_text_on_img_PIL.py

from PIL import Image, ImageFont, ImageDraw

im = Image.new('RGB', (1024, 1024), (255, 255, 255))

# in the font parameter, use a valid path to a font
font = ImageFont.truetype(
    font="D:/code_exprt/fzyh.ttf",
    size=250)
drawer = ImageDraw.Draw(im)

# we can measure the size of text in pixel with `textsize()` method
text_size = drawer.textsize(text="大美中國", font=font)
print("text size is {}".format(text_size))

# draw text on image with specified font and color,
# the doc on ImageDraw.text is https://goo.gl/m7hKcc
drawer.text((10, 10), "大美中國", font=font, fill=(10, 10, 10))

im.show()

approved.