InvalidSchema: No connection adapters were found forの意味がわからない

JupyterLab上でこのサイトでこの画像を出力したいです。

このようなコードで最終的に画像を表示したいです。

python
1Img=Image.open(io.BytesIO(requests.get(img_tag).content))
2Img

前提

以下のエラーメッセージの意味がわかりません。
InvalidSchema: No connection adapters were found for '<img alt="「織田信長」" class="cimage cimageContent" src="https://ranking.xgoo.jp/image_proxy/smartcrop/w_450_h_300/tool/images/column/2023/03/2023_0302_colmun_main1_1.jpg"/>'

発生している問題・エラーメッセージ

---------------------------------------------------------------------------
InvalidSchema                             Traceback (most recent call last)
/var/folders/jr/2p724fh51wv7fxmql7kxyb1h0000gn/T/ipykernel_50717/3505334762.py in <module>
----> 1 requests.get(img_tag)

~/opt/anaconda3/lib/python3.9/site-packages/requests/api.py in get(url, params, **kwargs)
     71     """
     72 
---> 73     return request("get", url, params=params, **kwargs)
     74 
     75 

~/opt/anaconda3/lib/python3.9/site-packages/requests/api.py in request(method, url, **kwargs)
     57     # cases, and look like a memory leak in others.
     58     with sessions.Session() as session:
---> 59         return session.request(method=method, url=url, **kwargs)
     60 
     61 

~/opt/anaconda3/lib/python3.9/site-packages/requests/sessions.py in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)
    585         }
    586         send_kwargs.update(settings)
--> 587         resp = self.send(prep, **send_kwargs)
    588 
    589         return resp

~/opt/anaconda3/lib/python3.9/site-packages/requests/sessions.py in send(self, request, **kwargs)
    693 
    694         # Get the appropriate adapter to use
--> 695         adapter = self.get_adapter(url=request.url)
    696 
    697         # Start time (approximately) of the request

~/opt/anaconda3/lib/python3.9/site-packages/requests/sessions.py in get_adapter(self, url)
    790 
    791         # Nothing matches :-/
--> 792         raise InvalidSchema(f"No connection adapters were found for {url!r}")
    793 
    794     def close(self):

InvalidSchema: No connection adapters were found for '<img alt="「織田信長」" class="cimage cimageContent" src="https://ranking.xgoo.jp/image_proxy/smartcrop/w_450_h_300/tool/images/column/2023/03/2023_0302_colmun_main1_1.jpg"/>'

該当のソースコード

python
1import requests
2from bs4 import BeautifulSoup
3url=('https://ranking.goo.ne.jp/column/8616/')
4res=requests.get(url)
5soup=BeautifulSoup(res.text,'html.parser')
6img_tag=soup.find_all('img')[19]
7
8from PIL import Image
9import io
10requests.get(img_tag)