how to display picture with red and black colors in waveshare epaper

[eleveyuan]

In this project, I wanna display a Chinese zodiac image, which contains black text and a red paper cutout. It's beautiful. It can show the power of Chinese character（‘龍’ means dragon）

here is problem, how to display it?

[eleveyuan]

here is the Programming Principle. So I have to split image into two images(red pixels and black pixels)

[eleveyuan]

lemariva/image2eink give a solution for this situation. and check this link(https://lemariva.com/blog/2019/08/raspberry-pi-displaying-images-eink-screen) for more detail

first use imagemagick to remap picture from a RGB-color scheme to a 3-color scheme

# Create 3 color palette:
magick xc:red xc:white xc:black +append palette.gif
# Image dithering using Floyd-Steinberg:
magick dragon.png -remap palette.gif res_dragon.png

then use lemariva's code to splite picture