Converting arrays to images using Python

ArrayImage.py

from PIL import Image
import numpy as np

# Generate a 100x100 array of random floats between 0.0 and 1.0
random_floats = np.random.rand(100,100)

# Scale these up to lie in the range of 8-bit integers (between 0.0 and 255.0)
random_floats_8bit = random_floats * 255.0

# Round these float values to the nearest integer
random_round = np.round(random_floats_8bit)

# Convert these rounded floats to actual 8 bit integers
random_8bit = np.array(random_round,dtype=np.uint8)

# Convert this array of 8bit integers into an image
random_image = Image.fromarray(random_8bit)

# Let's have a look at the image we've just created
random_image.show()

# It's really tiny so let's make it bigger (zoom in)
random_zoom = random_image.resize((5000,5000), Image.NEAREST)

# Let's have a look at this new, zoomed-in image
random_zoom.show()