Open an image with PIL

Python has a library called PIL (short for Python Image Library). With openCV, it provides a very useful set of objects to manipulate image data.

In order to read the content of an image, we will create an Image object

from PIL import Image

We now need to specify the image filename as an argument of the open function

img = Image.open("../images/load_image_PIL/myimage.png")

If you are in the notebook, you can display the image by calling the object you just created

img

png

If you pass the image object to the constructor of a Numpy array, the values of the image will be stored in that array

import numpy as np
np.array(img)

array([[[255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        ...,
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255]],

       [[255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        ...,
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255]],

       [[255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        ...,
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255]],

       ...,

       [[255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        ...,
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255]],

       [[255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        ...,
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255]],

       [[255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        ...,
        [255, 255, 255, 255],
        [255, 255, 255, 255],
        [255, 255, 255, 255]]], dtype=uint8)