The most recent version of ScraperWiki depends on Poppler (or so the GitHub says). Unfortunately, it only specifies how to get it on macOS and Linux, not Windows.
A
To Simply install Poppler on Windows run through the below mentioned steps without touching the environmental varible.
Now go to your Python code where you want to call Poppler for image conversion and use the below mentioned code snippet:
from pdf2image import convert_from_path
pages = convert_from_path('MyPdf.pdf', 500, poppler_path = r'C:\User\Poppler\poppler-0.68.0_x86\poppler-0.68.0\bin')
for page in pages:
page.save('out.jpg', 'JPEG')