Python - How To Convert A 24-bit PNG Image To 32-bit Using Open-cv Or PIL
Solution 1:
I looked at the christmas.png
image in the code you linked to, and it appears to be a 624x8 pixel image with a palette and an 8-bit alpha channel.
Assuming the sample image works, you can make one with the same characteristics by taking a PNG image and adding a fully opaque alpha channel like this:
#!/usr/local/bin/python3
from PIL import Image
# Load the image and convert to 32-bit RGBA
im = Image.open("image.png").convert('RGBA')
# Save result
im.save("result.png")
I generated a gradient image and applied that processing and got this, so maybe you can try that:
Solution 2:
I think you have confused the color bit-depth with the size of the input image/array. From the links posted in the comments, there is no mention of 32 as a bit depth. The script at that tutorial link uses an image with 3-channel, 8-bit color (red, green, and blue code values each represented as numbers from 0-255). The input image must have the same height as the array, but can be a different width to allow scrolling.
For more on bit-depth: https://en.wikipedia.org/wiki/Color_depth
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