title: python FPDF not sizing correctly
body: <p>I am getting a list of images from a directory and I am trying to convert a list of images to PDF. I am getting their width and height and using Image module. When the program runs and I open the PDF file, the picture look very big and only a corner of the pic.  </p>
  
  <pre><code>from fpdf import FPDF
  from PIL import Image
  import glob
  import os
  
  image_directory = '/Users/myuser/pics/'
  extensions = ('*.jpg','*.png','*.gif')
  pdf = FPDF()
  imagelist=[]
  for ext in extensions:
      imagelist.extend(glob.glob(os.path.join(image_directory,ext)))
  
  for imageFile in imagelist:
      cover = Image.open(imageFile)
      width, height = cover.size
      pdf.add_page()
      # 1 px = 0.264583 mm (FPDF default is mm)
      pdf.image(imageFile, 0, 0, float(width * 0.264583), float(height * 0.264583))
  pdf.output(image_directory + "file.pdf", "F")
  </code></pre>
  
  <p>The image is the left one and the right is the PDF
  <a href="https://i.stack.imgur.com/mM0aD.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mM0aD.jpg" alt="enter image description here"></a></p>