Show HN: Building a 42-inch E-Ink frame for generative art

Re:Show HN: Building a 42-inch E-Ink frame for generative art by schlarpc on Tuesday October 10, 2023 @04:26PM (#37837009)

I have a similar display, and also use blue noise dithering. Mine is driven in the backend by a web browser, which means I was able to abuse CSS and mix-blend-mode to do the dithering for me:

  ha-card::after {
    content: "";
    background-image: url(/local/visionect-dither.png);
    background-repeat: repeat;
    position: absolute;
    height: 100%;
    width: 100%;
    display: block;
    mix-blend-mode: multiply;
  }

The dithering texture used is 128_128/LDR_LLL1_10.png from https://github.com/Calinou/free-blue-noise-textures

[ Parent | on HN ]

Re:Show HN: Building a 42-inch E-Ink frame for generative art by lawlessone on Tuesday October 10, 2023 @04:50PM (#37837280)

what are the 3d and 4d textures?

[ Parent | on HN ]

Re:Show HN: Building a 42-inch E-Ink frame for generative art by webkike on Tuesday October 10, 2023 @05:21PM (#37837712)

(I could be wrong, but here's what I'm guessing) 3D refers to RGB, and 4D refers to RGB plus Alpha

[ Parent | on HN ]

Re:Show HN: Building a 42-inch E-Ink frame for generative art by jalict on Wednesday October 11, 2023 @02:56AM (#37841722)

Usually something like volumetric data, animations, or other forms of data packed into something the GPU can swallow. I am not sure why you would apply the filters to those kinds.

[ Parent | on HN ]

Re:Show HN: Building a 42-inch E-Ink frame for generative art by ghusbands on Wednesday October 11, 2023 @07:00AM (#37842979)

Looking at the example image in the article for the dithering, it does unnecessarily reduce the quality in some areas, like the water on the left, the buildings in the bottom left and the background on the right.

[ Parent | on HN ]