基于rust实现Floyd Steinberg效果
```use image::{DynamicImage, ImageBuffer};
use wasm_bindgen::prelude::*;
use web_sys::ImageData;
#
pub fn floyd_steinberg(image_data: ImageData) -> Vec<u8> {
let width = image_data.width();
let height = image_data.height();
let raw_pixels = image_data.data().to_vec();
_floyd_steinberg(width, height, raw_pixels)
}
fn _floyd_steinberg(width: u32, height: u32, data: Vec<u8>) -> Vec<u8> {
let image_buf = ImageBuffer::from_vec(width, height, data).unwrap();
let image = DynamicImage::ImageRgba8(image_buf);
let raw_pixels = image.to_luma8().to_vec();
let color_map = image::imageops::colorops::BiLevel;
let mut img_buffer = ImageBuffer::from_vec(width, height, raw_pixels).unwrap();
image::imageops::colorops::dither(&mut img_buffer, &color_map);
let dither_img = image::DynamicImage::ImageLuma8(img_buffer);
dither_img.to_rgba8().to_vec()
}
```
效果：
更多效果查看：https://yirandidi.github.io/yr_rust_konva/
源码：https://github.com/yirandidi/yr_rust_konva
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