Binary image grayscale 1bit bw great COLOR 1-bit pixel art combining imagery

 grayscale 1bit bw great
https://www.vintagecomputing.com/index.php/archives/687/great-images-in-1-bit-color-mona-lisa
https://en.wikipedia.org/wiki/Binary_image
https://commons.wikimedia.org/wiki/File:Mona_Lisa-gutenberg121.jpg

https://simple.wikipedia.org/wiki/Dither
 https://en.m.wikipedia.org/wiki/dither
抖動(數位訊號處理)

https://learn.microsoft.com/en-us/dotnet/api/system.drawing.imaging.pixelformat?view=dotnet-plat-ext-8.0
Format1bppIndexed     196865     Specifies that the pixel format is 1 bit per pixel and that it uses indexed color. The color table therefore has two colors in it.

programming grayscale 1bit bw great Converting a grayscale image to black and white image  Transforming a Grayscale Picture
https://stackoverflow.com/questions/29577465/converting-a-grayscale-image-to-black-and-white-image-in-c-sharp
https://copyprogramming.com/howto/converting-a-grayscale-image-to-black-and-white-image-in-c