参考url

pip install

DOS> .\python.exe -m pip install google-cloud-vision

python script

#!python
# -*- coding: utf-8 -*-
import sys
from google.cloud import vision
from google.oauth2 import service_account
from PIL import Image

def main():
    text_detection()

def text_detection():
    tiff_file_path = sys.argv[1]

    img = Image.open(tiff_file_path)

    img_file_path = tiff_file_path
    img_file_path = "tmp.png"
    img.save( img_file_path )

    credentials = service_account.Credentials.from_service_account_file(
        'brave-airship-ないしょ.json'
    )

    client = vision.ImageAnnotatorClient(credentials=credentials)
    with open(img_file_path ,'rb') as f:
        content = f.read()
    image = vision.Image(content=content)

    response = client.text_detection(image=image)
    #response = client.label_detection(image=image)
    #response = client.document_text_detection(image=image)

    if response.error.message:
        print( response )
        return

    for text in response.text_annotations:
        disp_str = text.description.encode('cp932',"ignore").decode('cp932')
        print( disp_str )

if __name__ == '__main__':
    main()