如何在Python中讀取和設定像素RGB值？

Reading and Setting Pixel RGB Values in Python

Question:

How can you determine the RGB values of a specific pixel in an image using Python's built-in libraries? Conversely, how can you modify the RGB values of a pixel in a blank image?

Answer:

While the Python Image Library (PIL) offers a comprehensive solution for this task, it requires additional installation. To avoid such dependency, you can utilize the built-in Image module.

Reading Pixel Values:

<code class="python">from PIL import Image

im = Image.open('image.jpg')
pix = im.load()
print(pix[x, y])  # Get the RGB tuple for pixel at coordinates (x, y)</code>

Setting Pixel Values:

<code class="python">pix[x, y] = (red, green, blue, alpha)  # Set the RGB and alpha values for pixel (x, y)
im.save('modified_image.png')  # Save the edited pixels</code>

This provides a basic method for modifying individual pixels within an image without external dependencies.

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