Kernel: Python 3 (Ubuntu Linux)

read image pillow/pil and matplotlib into numpy array

Kernel: "Python 3 (Ubuntu Linux)"

In [1]:

!wget -q -N http://www.mindlaws.com/space/galaxypic1.jpg

In [2]:

!file galaxypic1.jpg

galaxypic1.jpg: JPEG image data, JFIF standard 1.01, aspect ratio, density 1x1, segment length 16, comment: "Xat.com uJDO", baseline, precision 8, 350x350, frames 3

In [1]:

from IPython.display import Image
Image('galaxypic1.jpg')

In [2]:

import PIL
import numpy as np
img = PIL.Image.open("galaxypic1.jpg").convert("L") 
galaxy = np.array(img)
print(galaxy.shape)
galaxy

(350, 350)

array([[1, 1, 1, ..., 3, 2, 2],
       [1, 1, 1, ..., 3, 3, 2],
       [1, 1, 1, ..., 3, 3, 3],
       ...,
       [2, 2, 2, ..., 1, 1, 1],
       [2, 2, 2, ..., 2, 2, 2],
       [2, 2, 2, ..., 2, 2, 2]], dtype=uint8)

In [3]:

import matplotlib.pyplot as plt
galaxy2 = plt.imread("galaxypic1.jpg")
galaxy2.shape

(350, 350, 3)

In [4]:

galaxy2[90:100, 90:100, :].sum(axis=2)

array([[32, 27, 27, 27, 29, 29, 23, 26, 29, 32],
       [32, 29, 27, 27, 29, 32, 26, 26, 30, 33],
       [31, 29, 29, 29, 31, 31, 27, 30, 33, 33],
       [35, 31, 31, 31, 33, 33, 27, 30, 33, 38],
       [35, 33, 31, 31, 33, 35, 27, 30, 33, 38],
       [35, 33, 31, 33, 33, 35, 30, 30, 35, 38],
       [38, 38, 41, 42, 42, 42, 21, 50, 33, 42],
       [38, 38, 42, 42, 42, 42, 53, 22, 23, 23],
       [38, 38, 42, 42, 42, 42, 51, 23, 90, 77],
       [38, 39, 42, 42, 42, 42, 62, 25, 62, 31]], dtype=uint64)

In [0]: