python - 树莓派相机透明图像叠加

Question

是否可以在 pi 相机预览上叠加透明(png 或 gif)图像？

我找到了一些代码，但它是白色背景

import picamera

from PIL import Image
from time import sleep

with picamera.PiCamera() as camera:

camera.start_preview()

# Load the arbitrarily sized image
img = Image.open('lol.gif')
# Create an image padded to the required size with
# mode 'RGB'
pad = Image.new('RGB', (
    ((img.size[0] + 31) // 32) * 32,
    ((img.size[1] + 15) // 16) * 16,
    ))
# Paste the original image into the padded one
pad.paste(img, (0, 0))

# Add the overlay with the padded image as the source,
# but the original image's dimensions
o = camera.add_overlay(pad.tostring(), size=img.size)
# By default, the overlay is in layer 0, beneath the
# preview (which defaults to layer 2). Here we make
# the new overlay semi-transparent, then move it above
# the preview
o.alpha = 255
o.layer = 3

# Wait indefinitely until the user terminates the script
while True:
    sleep(1)

Answer 1

将 'RGB' 更改为 'RGBA'

我没有条件来测试它，但我想这会解决你的问题。