Getting image sizes automatically

pyIIIFpres do not provide built-in methods for inferring information about the images. Depending on your need you might find useful different solutions.

	Format not supported
Using ImageAPI	None
Pillow	None.
Exiftools	None
OpenCV	jpg 2000
Matplotlib	jpg 2000

Using ImageAPI

import requests
# when you use a proxy you might have to use the original link e.g. "http://localhost:1080/iipsrv/iipsrv.fcgi?iiif=/imageapi//m0171_0/m0171_0visn20_0001a21.jp2/info.json"
iiifimageurl = "http://lezioni.meneghetti.univr.it//imageapi/m0171_0/m0171_0visn20_0001a21.jp2/info.json" 
imageinfo =  requests.get(iiifimageurl)
jsoninfo = imageinfo.json()
imgwidth = jsoninfo['width']
imgheight = jsoninfo['height']

Exiftool

Once installed Exiftool it can be called as a subprocess:

from subprocess import check_output
out = check_output(["exiftool", imagepath])
Metadata = dict((e[:32].strip(),e[33:].strip()) for e in out.decode('utf8').split('\n'))
width = Metadata['Image Width']
height = Metadata['Image Height']

Using Pillow

pip install Pillow

from PIL import Image
image = PIL.Image.open("image.png")
width, height = image.size

Using OpenCV

pip install opencv-python

import cv2
img = cv2.imread('image.jpg')
width, height, channelsN = img.shape