@thi.ng/pixel-convolve/pyramid.js

Extensible bitmap image convolution, kernel presets, normal map & image pyramid generation

import { assert } from "@thi.ng/errors/assert";
import { convolveImage, LANCZOS } from "./convolve.js";
function* imagePyramid(src, kernel = LANCZOS(2), minSize = 1, includeOrig = true) {
  assert(minSize > 0, `invalid min size`);
  minSize <<= 1;
  if (includeOrig) yield src;
  while (src.width >= minSize && src.height >= minSize) {
    src = convolveImage(src, { kernel, stride: 2 });
    yield src;
  }
}
export {
  imagePyramid
};