Trying to run simple PIL python example, can't convert jpeg to float

Question

so I wrote a simple python script

from PIL import Image
from pylab import *
im = array(Image.open(\'sample.jpg\'))
imshow(im)

and i get this er

Answer 1

What you have is close. Looking at the imshow docs, you need to pass either an Image OR a data array.

This should work:

from PIL import Image
from pylab import *
im = Image.open('sample.jpg')
imshow(im)

Here's what imshow() is expecting:

"X may be a float array, a uint8 array or a PIL image."

There are some more details here:
http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.imshow

Answer 2

I know this is coming very later but I thought I should answer just in case anyone else had the same problem. I ran into the same problem and the issue was the image I loaded did not exist in the project folder.so you need to check that sample.jpg exist and that it loads properly before using it.

if os.path.isfile('sample.jpg'): im = array(Image.open('sample.jpg'))
if im == None or im.size == 0: 
   print 'Image loaded is empty'
   sys.exit(1)

Answer 3

Try this

>>> import matplotlib.pyplot as plt
>>> plt.imshow(im.reshape(im.shape[0], im.shape[1]), cmap=plt.cm.Greys)