[PYTHON] Put Japanese fonts in images with Colaboratory

1. Put fonts locally in Colab
2. Load images with OpenCV
3. Font drawing with PIL
4. Image display with OpenCV

I referred to this. Watlab | How to put Japanese characters in images with Python https://watlab-blog.com/2019/08/25/image-text/ How to put your favorite font in Google Colaboratory and use it with matplotlib https://qiita.com/nkay/items/b2d50349a3f5d38df45b

font.py

#Install fonts locally in Colab
from google.colab import drive
drive.mount("/content/gdrive")
!cp -a "gdrive/My Drive/font/" "/usr/share/fonts/"

from PIL import Image, ImageFont, ImageDraw
import cv2
import numpy as np
from google.colab.patches import cv2_imshow

#Function to put text in image
def img_add_msg(img, message):
    font_path = '/usr/share/fonts/meiryo.ttc'           #Path to Colab fonts
    font_size = 100                                     
    font = ImageFont.truetype(font_path, font_size)     #Define fonts in PIL
    img = Image.fromarray(img)                          # cv2(NumPy)Convert type image to PIL type
    draw = ImageDraw.Draw(img)                          #Draw function for drawing

    #Draw text (position, text, font, text color (BGR)+α) is specified)
    draw.text((50, 50), message, font=font, fill=(255, 255, 255, 0))
    img = np.array(img)                                 #PIL type image cv2(NumPy)Convert to type
    return img                                          #Returns an image with text

img = cv2.imread('/content/gdrive/My Drive/hoge/huga.jpg', 1)     #Image loading
message = 'Hello World'                                           #Japanese to put in the image
img = img_add_msg(img, message)                        

#Image display
cv2_imshow(img)

Yes.