Retrieving and Modifying RGB Pixel Values in Python

Retrieving RGB Values

To obtain the RGB values of a specific pixel with coordinates (x, y) from an image loaded with open("image.jpg"), you can use the Python Image Library (PIL). Here's how:

from PIL import Image

im = Image.open('image.jpg')
pix = im.load()
rgb_values = pix[x, y]

The rgb_values variable will be a tuple containing the Red, Green, and Blue values.

Writing Pixels

To create a pixel with a given RGB value on a blank graphic, you can again use PIL. Here's a simple example:

from PIL import Image
import numpy as np

# Create a new blank image
img = np.zeros((500, 500, 3), dtype=np.uint8)
img[200, 200] = [255, 0, 0]  # Set the pixel at coordinates (200, 200) to red

# Create an Image object from the array
im = Image.fromarray(img)

# Save the image as a PNG
im.save('test.png')

Note: PIL is an external library that needs to be installed separately to use this solution.